JP3371573B2 - Manufacturing method of lithium secondary battery - Google Patents
Manufacturing method of lithium secondary batteryInfo
- Publication number
- JP3371573B2 JP3371573B2 JP26235294A JP26235294A JP3371573B2 JP 3371573 B2 JP3371573 B2 JP 3371573B2 JP 26235294 A JP26235294 A JP 26235294A JP 26235294 A JP26235294 A JP 26235294A JP 3371573 B2 JP3371573 B2 JP 3371573B2
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- active material
- electrode active
- secondary battery
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はリチウム二次電池の製造
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a lithium secondary battery.
【０００２】[0002]
【従来の技術】近年、電子機器の小型化が進み、それに
応じて電力源となる電池の小型化が進み、特に携帯性を
重視して二次電池の小型化が強く望まれている。その中
でも従来の二次電池と比較して、単位体積、単位重量あ
たりの放電容量が大きいリチウム二次電池の開発が進ん
でおり、特開平１−３０４６６４号公報、特開平３−２
２５７５０号公報、特開平４−５６０６４号公報に示さ
れるようにその正極材料、負極材料、電解液等の材料開
発、あるいは特開平１−１８４０６９号公報、特開平１
−１９４２６５号公報、特開平２−１５８０５５号公報
に示されるように製造方法等の検討がなされている。2. Description of the Related Art In recent years, miniaturization of electronic devices has progressed, and accordingly miniaturization of batteries serving as a power source has progressed. In particular, there is a strong demand for miniaturization of secondary batteries with an emphasis on portability. Among them, a lithium secondary battery having a larger discharge capacity per unit volume and unit weight than that of a conventional secondary battery is under development, and is disclosed in JP-A-1-304664 and JP-A-3-2.
No. 25750 and Japanese Patent Application Laid-Open No. 4-56064, the development of materials such as the positive electrode material, the negative electrode material, and the electrolytic solution, or Japanese Patent Application Laid-Open Nos. 1-184069 and 1
As disclosed in Japanese Patent Application Laid-Open No. 194265 and Japanese Patent Application Laid-Open No. 2-158055, the manufacturing method and the like have been studied.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら従来の製
造方法、特に塗料化工法では負極活物質塗料の分散性が
不良であるために、塗膜密度が低く電池容量が不足す
る。また未分散の凝集塊による突起状のブツブツが多
く、充放電を繰り返すと負極表面に金属リチウム析出が
見られ放電特性が劣化する。本発明はこの課題に対しリ
チウム二次電池の製造方法、特に負極活物質塗料の塗料
化工程を検討することにより、負極の高密度化と均一化
を図り、放電特性を改善したリチウム二次電池を提供す
ることを目的としている。However, in the conventional manufacturing method, particularly the coating method, the dispersibility of the negative electrode active material coating material is poor, so that the coating film density is low and the battery capacity is insufficient. In addition, there are many protrusion-like lumps due to undispersed aggregates, and when charging and discharging are repeated, metallic lithium is deposited on the surface of the negative electrode and the discharge characteristics deteriorate. The present invention addresses this problem by examining a method for manufacturing a lithium secondary battery, particularly a coating process of a negative electrode active material coating, to achieve high density and uniformization of the negative electrode, and a lithium secondary battery having improved discharge characteristics. Is intended to provide.
【０００４】[0004]
【課題を解決するための手段】本発明は、電極板の少な
くとも一方の面にＬｉXＭＯ2（但し、Ｍは１種以上の遷
移金属を表し、０．０５≦Ｘ≦１．１０である。）を主
成分とする正極活物質層を形成し、前記電極板とは異な
る電極板の少なくとも一方の面に、炭素質材料を主成分
とする負極活物質層を形成してなるリチウム二次電池の
製造方法であって、前記負極活物質層を形成する活物質
塗料をスクリューパドルを組み合わせてなる連続式二軸
混練装置において混練し、前記負極活物質塗料の全塗料
重量に対する固形分重量比を３０％以上、９０％以下で
混練とすること、あるいは前記負極活物質層を形成する
活物質塗料をオリフィス状細孔と前記オリフィス状細孔
と対面する板面からなる超高圧分散装置において分散
し、前記負極活物質塗料の全塗料重量に対する全固形分
重量比が、５０％以上、７０％以下とし、かつ、前記オ
リフィス状細孔から前記負極活物質塗料を５０ｋｇ／ｃ
ｍ 2 以上、７００ｋｇ／ｃｍ 2 以下の圧力で吐出させるこ
と、あるいは前記負極活物質層を形成する活物質塗料を
前記連続式二軸混練装置において混練した後に、前記超
高圧分散装置において分散し、前記連続式二軸混練装置
において前記負極活物質塗料の全塗料重量に対する全固
形分重量比が、３０％以上、９０％以下で混練し、か
つ、超高圧分散装置においてオリフィス状細孔から５０
ｋｇ／ｃｍ 2 以上、７００ｋｇ／ｃｍ 2 以下の圧力で前記
負極活物質塗料を吐出させることを特徴とするリチウム
二次電池の製造方法である。According to the present invention, Li X MO 2 (where M represents one or more kinds of transition metals, and 0.05 ≦ X ≦ 1.10) is provided on at least one surface of the electrode plate. .) As a main component, and a negative electrode active material layer containing a carbonaceous material as a main component is formed on at least one surface of an electrode plate different from the electrode plate. A method of manufacturing a battery, wherein an active material coating material forming the negative electrode active material layer is kneaded in a continuous biaxial kneading device combining a screw paddle, and a solid content weight ratio relative to the total coating material weight of the negative electrode active material coating material. Of 30% or more and 90% or less, or the active material coating material for forming the negative electrode active material layer is dispersed in an ultrahigh pressure dispersion device composed of orifice-shaped pores and a plate surface facing the orifice-shaped pores. and, the negative active material The total solid content relative to the total paint weight of the paint
The weight ratio is 50% or more and 70% or less, and
50 kg / c of the negative electrode active material paint from the pores
Discharge at a pressure of m 2 or more and 700 kg / cm 2 or less.
When, or the negative electrode active active material coating composition forming a material layer after kneading in the continuous twin-screw kneading apparatus, wherein the dispersed in the ultra high-pressure dispersion apparatus, the continuous biaxial kneader
In the above-mentioned negative electrode active material paint,
Kneading with a weight ratio of shape components of 30% or more and 90% or less,
In the ultra high pressure disperser, 50 from the orifice
The above is applied at a pressure of not less than kg / cm 2 and not more than 700 kg / cm 2.
A method for producing a lithium secondary battery, which comprises discharging a negative electrode active material coating material .
【０００５】[0005]
【作用】本発明によれば、リチウム二次電池の負極活物
質塗料を作成するにあたり連続式二軸混練装置において
混練すること、あるいは超高圧分散装置において分散す
ること、あるいは連続式二軸混練装置により混練した後
に超高圧分散装置において分散することにより、負極の
高密度化と均一化が可能となり、放電特性の良いリチウ
ム二次電池を供給することができる。According to the present invention, in preparing a negative electrode active material coating material for a lithium secondary battery, kneading in a continuous biaxial kneading device, or dispersing in an ultrahigh pressure dispersing device, or continuous biaxial kneading device By kneading by the method and then dispersing in an ultra-high pressure dispersing device, it is possible to make the negative electrode highly dense and uniform, and to supply a lithium secondary battery having good discharge characteristics.
【０００６】[0006]
【実施例】本発明に用いられる負極の炭素質材料として
は結晶性の高い黒鉛や非晶質炭素を用いることができ、
例えば結晶性の高い黒鉛としてはメソカーボンマイクロ
ビーズ（以下ＭＣＭＢと略す。）、非晶質炭素としては
有機高分子樹脂を焼結した樹脂炭等を用いることができ
る。EXAMPLES As the carbonaceous material of the negative electrode used in the present invention, highly crystalline graphite or amorphous carbon can be used,
For example, mesocarbon microbeads (hereinafter abbreviated as MCMB) can be used as graphite having high crystallinity, and resin charcoal obtained by sintering an organic polymer resin can be used as amorphous carbon.
【０００７】本発明に用いられる負極の結合剤樹脂とし
てはホルマール系樹脂、アセタール系樹脂、アクリル／
スチレン系共重合樹脂、スチレン／ブタジエン系共重合
樹脂（以下ＳＢＲ系樹脂と略す。）等を用いることがで
きる。As the binder resin for the negative electrode used in the present invention, formal type resin, acetal type resin, acrylic /
A styrene-based copolymer resin, a styrene / butadiene-based copolymer resin (hereinafter abbreviated as SBR resin), or the like can be used.
【０００８】本発明に用いられる負極活物質塗料は、ス
クリューパドルを組み合わせてなる連続二軸混練装置を
用いて混練することにより塗膜密度が高い負極板を得る
ことができる。The negative electrode active material coating material used in the present invention can be kneaded using a continuous biaxial kneading device in which a screw paddle is combined to obtain a negative electrode plate having a high coating density.
【０００９】本発明に用いられる負極活物質塗料は、連
続式二軸混練装置において活物質塗料の塗料重量に対す
る固形分重量比（以下ＮＶと略す。）が３０％以上、９
０％以下で混練することが好ましく、４０％以上、８０
％以下で混練することが望ましい。活物質塗料のＮＶが
３０％より低いと塗料中の溶剤成分が多く、粉体に剪断
力を負荷することができず凝集塊の多い活物質塗料とな
る。また９０％より高いと塗料中の溶剤分が少なく、粉
体の濡れを促進させることができず充分な混練が得られ
ない。The negative electrode active material coating material used in the present invention has a solid content weight ratio (hereinafter abbreviated as NV) of 30% or more to the coating material weight of the active material coating material in a continuous biaxial kneading device.
It is preferable to knead at 0% or less, 40% or more, 80
It is desirable to knead the mixture at a rate of not more than%. When the NV of the active material coating is lower than 30%, the coating composition contains a large amount of solvent components, and the powder cannot be loaded with a shearing force, resulting in an active material coating having many agglomerates. On the other hand, if it is higher than 90%, the solvent content in the coating material is small, the wetting of the powder cannot be promoted, and sufficient kneading cannot be obtained.
【００１０】本発明に用いられる連続式二軸混練装置
は、一対の同心軸上にスクリューパドルを組み合わせ、
組み合わされた一対のスクリューパドルを回転させるこ
とにより、スクリューパドルを内包するバレルとの間隙
で塗料組成物を搬送しながらかつ混練する工程を連続的
に設定することが可能である。本連続二軸混練装置は従
来の混練装置と比較して連続的に塗料組成物を処理でき
ること、並びにスクリューパドルを自由に組み合わせる
ことにより、塗料組成物に合わせた任意の混練条件を設
定することができることが特徴である。連続式二軸混練
装置により混練する前に、前処理として活物質粉体を結
合剤樹脂、溶剤で湿潤させる工程を設けてもよい。The continuous twin-screw kneading apparatus used in the present invention is a combination of screw paddles on a pair of concentric shafts,
By rotating the pair of screw paddles combined with each other, it is possible to continuously set the step of kneading while transporting the coating composition in the gap between the barrel containing the screw paddles. This continuous biaxial kneading device can continuously treat the coating composition as compared with the conventional kneading device, and by freely combining screw paddles, it is possible to set any kneading condition according to the coating composition. The feature is that you can do it. Before kneading with a continuous biaxial kneading device, a step of wetting the active material powder with a binder resin and a solvent may be provided as a pretreatment.
【００１１】本発明に用いられる負極活物質塗料は、オ
リフィス状細孔から高圧の塗料を吐出し対面する板面に
衝突することにより塗料を分散する超高圧分散装置によ
り分散性が良く、凝集物の無い塗料を得ることができ
る。The negative electrode active material coating material used in the present invention has good dispersibility and agglomerates by an ultra-high pressure dispersion device that disperses the coating material by ejecting the high pressure coating material from orifice-shaped pores and colliding with the facing plate surface. It is possible to obtain a paint without
【００１２】本発明に用いられる負極活物質塗料は、５
０ｋｇ／ｃｍ2以上、７００ｋｇ／ｃｍ2以下の吐出圧力
で吐出されることが好ましく、１００ｋｇ／ｃｍ2以
上、５００ｋｇ／ｃｍ2以下で吐出されることが望まし
い。吐出圧力が５０ｋｇ／ｃｍ2より低いと衝撃力が低
いために十分な分散が達成されない、また吐出圧力が７
００ｋｇ／ｃｍ2より高いと衝撃力が大きいために、発
熱が大きく塗料材料が変性するだけでなく、活物質が破
壊されるために放電特性が低下する。超高圧分散装置を
用いて分散する塗料は流動性を有することが必要であ
り、ダブルプラネタリーミキサーやディゾルバー等を用
いて活物質粉体を結合剤樹脂、溶剤等により攪拌混合し
て流動性を有する活物質塗料とする前処理を施すことが
望ましい。The negative electrode active material paint used in the present invention is 5
The discharge pressure is preferably 0 kg / cm 2 or more and 700 kg / cm 2 or less, and more preferably 100 kg / cm 2 or more and 500 kg / cm 2 or less. If the discharge pressure is lower than 50 kg / cm 2 , sufficient impact cannot be achieved because the impact force is low.
When it is higher than 00 kg / cm 2 , the impact force is large, so that the heat generation is large and the coating material is modified, and the active material is destroyed, so that the discharge characteristics are deteriorated. It is necessary that the coating material that is dispersed using an ultra-high pressure dispersion device has fluidity, and the fluidity is obtained by stirring and mixing the active material powder with a binder resin, solvent, etc. using a double planetary mixer, dissolver, etc. It is desirable to perform a pretreatment to obtain the active material paint.
【００１３】本発明に用いられる正極のＬｉXＭＯ2（但
し、Ｍは１種以上の遷移金属を表し、０．０５≦Ｘ≦
１．１０である。）の遷移金属としてはＣｏ、Ｎｉ、Ｖ
等を用いることができ、Ｃｏ、Ｎｉを用いることが好ま
しい。Li X MO 2 of the positive electrode used in the present invention (where M represents one or more kinds of transition metals, and 0.05 ≦ X ≦
It is 1.10. ) Transition metals include Co, Ni, V
Etc. can be used, and Co and Ni are preferably used.
【００１４】本発明に用いられる正極の結合剤樹脂とし
てはフッ素系樹脂を使用することが好ましく、例えばＰ
ＴＦＥ樹脂、ＰＶｄＦ樹脂等を用いることができる。As the binder resin for the positive electrode used in the present invention, it is preferable to use a fluorine resin, for example, P
TFE resin, PVdF resin or the like can be used.
【００１５】また、正極には導電性確保のために導電性
カーボンを使用してもよい。本発明で得られる正極、及
び負極は正極活物質塗料、及び負極活物質塗料を電極板
（通常は正極はアルミ箔、負極は銅箔）上に、それぞれ
公知の方法により塗布することで形成することができ
る。また得られた極板を所定の膜厚、密度に処理すべく
カレンダー処理を施すこともできる。Further, conductive carbon may be used for the positive electrode in order to secure conductivity. The positive electrode and the negative electrode obtained in the present invention are formed by applying a positive electrode active material coating material and a negative electrode active material coating material on an electrode plate (usually an aluminum foil for the positive electrode and a copper foil for the negative electrode) by known methods. be able to. Further, the obtained electrode plate may be subjected to calendering so as to be processed to have a predetermined film thickness and density.
【００１６】（図１）に本発明に用いられる塗料化プロ
セス例を示す。１は連続式二軸混練装置、２はディゾル
バー、３は超高圧分散装置、４は塗工装置、５はカレン
ダー装置である。FIG. 1 shows an example of a coating process used in the present invention. 1 is a continuous twin-screw kneading device, 2 is a dissolver, 3 is an ultrahigh pressure dispersing device, 4 is a coating device, and 5 is a calendering device.
【００１７】連続式二軸混練装置１は、ホッパ６から供
給される活物質塗料７ａを、搬送しながらかつ混練する
工程８ａと、溶剤あるいは別分散した塗料７ｂを、添加
しながら混練する工程８ｂを連続的に設定することが可
能である。なお、１１はスクリューパドルを示す。The continuous twin-screw kneading apparatus 1 includes a step 8a of kneading the active material coating material 7a supplied from the hopper 6 while it is being conveyed, and a step 8b of kneading it while adding a coating material 7b which is a solvent or another dispersion. Can be set continuously. In addition, 11 shows a screw paddle.
【００１８】ディゾルバー２は、連続二軸混練装置で作
成された活物質塗料７ｃに溶剤あるいは別分散した塗料
７ｂを添加することができる。ディゾルバー２は連続二
軸混練装置１で作成された活物質塗料７ｃが次工程の超
高圧分散装置３で容易に分散される塗料であるならば必
ずしも必要ではない。For the dissolver 2, the active material paint 7c prepared by a continuous twin-screw kneading machine can be added with a solvent or another paint 7b dispersed separately. The dissolver 2 is not always necessary as long as the active material coating material 7c produced by the continuous biaxial kneading device 1 is a coating material which can be easily dispersed by the ultrahigh pressure dispersing device 3 in the next step.
【００１９】超高圧分散装置３は、オリフィス状細孔１
２から塗料を吐出して分散する原理を用いた、分散媒体
を用いない分散装置で、例えばＡＰＶゴウリン社製ホモ
ジナイザを用いることができる。主たる塗料化装置が超
高圧分散装置３の場合には塗料はある程度の流動性を有
していないと分散できないために、前処理としてディゾ
ルバー２あるいはダブルプラネタリーミキサー等におい
て活物質粉体と、結合剤樹脂、溶剤の攪拌混合処理が必
要になる。The ultra-high pressure dispersion device 3 has an orifice-shaped pore 1
A homogenizer manufactured by APV Gourin Co., Ltd. can be used in a dispersion device that does not use a dispersion medium and that uses the principle of discharging and dispersing the coating material from 2. When the main paint-making device is the ultra-high pressure dispersing device 3, the paint cannot be dispersed unless it has a certain degree of fluidity. Therefore, as a pretreatment, it is combined with the active material powder in the dissolver 2 or the double planetary mixer. It is necessary to stir and mix the agent resin and solvent.
【００２０】塗工装置４は、グラビアコータ、コンマコ
ータ、キスコータ、リバースコータ、ダイコータ等の塗
布部４ａと乾燥部４ｂを組み合わせて用いることができ
る。The coating device 4 may be a combination of a coating part 4a such as a gravure coater, a comma coater, a kiss coater, a reverse coater and a die coater and a drying part 4b.
【００２１】カレンダー装置５は、ロール９を複数段組
み合わせて圧力、温度等を設定して極板を所定内の厚
み、密度にカレンダリングすることができる。ロール９
の材料としては、メタル、樹脂等を用いることができ、
メタル−メタル、メタル−樹脂等の組み合わせができ
る。カレンダー処理は塗工乾燥後の塗膜密度が所定内の
密度であれば必ずしも必要ではない。The calendering device 5 is capable of calendering the electrode plate to a predetermined thickness and density by combining a plurality of rolls 9 and setting the pressure, temperature and the like. Roll 9
As the material of, metal, resin, etc. can be used,
Combinations of metal-metal, metal-resin, etc. are possible. Calendering is not always necessary as long as the coating film density after coating and drying is within the predetermined range.
【００２２】本発明の正極活物質層は、ＬｉXＭＯ2（但
し、Ｍは１種以上の遷移金属を表し、０．０５≦Ｘ≦
１．１０である。）と、結合剤樹脂、溶液、必要に応じ
て加えられる導電剤からなる活物質塗料を上記塗料化プ
ロセス、塗工プロセス例を用いて塗膜密度を３．２ｇ／
ｃｍ3以上、４．０ｇ／ｃｍ3以下にすることが好まし
く、３．４ｇ／ｃｍ3以上、３．８ｇ／ｃｍ3以下にする
ことが望ましい。塗膜密度が３．２ｇ／ｃｍ3より低い
と一定体積内に規定重量以上の活物質を充填できないた
めに放電容量が低下する。また塗膜密度が４．０ｇ／ｃ
ｍ3より大きいと、塗膜内の空隙が減るために電解液と
の接触が悪化して、活物質が有効に活用されないために
放電容量が低下する。The positive electrode active material layer of the present invention comprises Li X MO 2 (where M represents one or more kinds of transition metals, and 0.05 ≦ X ≦
It is 1.10. ) And a binder resin, a solution, and a conductive agent added as needed, and an active material coating material having a coating film density of 3.2 g /
cm 3 or more, preferably to 4.0 g / cm 3 or less, 3.4 g / cm 3 or more, it is desirable to 3.8 g / cm 3 or less. When the coating film density is less than 3.2 g / cm 3 , the discharge capacity is lowered because the active material cannot be filled in a certain volume in excess of the specified weight. The coating film density is 4.0 g / c
When it is larger than m 3 , the voids in the coating film are reduced, so that the contact with the electrolytic solution is deteriorated and the active material is not effectively utilized, so that the discharge capacity is reduced.
【００２３】本発明の負極活物質層は、炭素質材料と、
結合剤樹脂、溶液からなる活物質塗料を上記塗料化プロ
セス、塗工プロセス例を用いて塗膜密度を１．０ｇ／ｃ
ｍ3以上、１．８ｇ／ｃｍ3以下にすることが好ましく、
１．２ｇ／ｃｍ3以上、１．６ｇ／ｃｍ3以下にすること
が望ましい。塗膜密度が１．０ｇ／ｃｍ3より低いと一
定体積内に規定重量以上の活物質を充填できないために
放電容量が低下する。また塗膜密度が１．８ｇ／ｃｍ3
より大きいと、塗膜内の空隙が減るために電解液との接
触が悪化して、活物質が有効に活用されないために放電
容量が低下する。The negative electrode active material layer of the present invention comprises a carbonaceous material,
An active material paint consisting of a binder resin and a solution was used to obtain a coating film density of 1.0 g / c by using the above-mentioned coating process and coating process examples.
m 3 or more and 1.8 g / cm 3 or less are preferable,
It is desirable that the amount is 1.2 g / cm 3 or more and 1.6 g / cm 3 or less. When the coating film density is lower than 1.0 g / cm 3 , the discharge capacity is reduced because it is impossible to fill the active material in a given volume with a specified weight or more. The coating film density is 1.8 g / cm 3.
When it is larger than the above range, the voids in the coating film are reduced, so that the contact with the electrolytic solution is deteriorated and the active material is not effectively utilized, so that the discharge capacity is reduced.
【００２４】本発明は上記した構成、すなわち負極活物
質塗料を二軸混練装置において混練すること、あるいは
負極活物質塗料を超高圧分散装置において分散するこ
と、あるいは負極活物質塗料を連続式二軸混練装置にお
いて混練した後に、超高圧分散装置において分散するこ
とにより負極の高密度化と均一化の改善が可能となり、
放電特性に優れたリチウム二次電池を提供することがで
きる。The present invention has the above-described structure, that is, the negative electrode active material coating material is kneaded in a biaxial kneading device, or the negative electrode active material coating material is dispersed in an ultrahigh pressure dispersing device, or the negative electrode active material coating material is continuous biaxial. After kneading in the kneading device, it becomes possible to improve the density and homogenization of the negative electrode by dispersing in the ultra-high pressure dispersing device,
A lithium secondary battery having excellent discharge characteristics can be provided.
【００２５】以下、本発明を実施例を用いて説明する。
負極の作製
（負極１）
ＭＣＭＢ １００部
ＳＢＲ系樹脂 ５部
ＣＭＣ水溶液 ４５部
上記組成物を連続式二軸混練装置で混練した後、ディゾ
ルバーにおいて、
ＣＭＣ水溶液 ６０部
添加して負極活物質塗料を得た。
（負極２）負極１の負極塗料の連続式二軸混練装置での
ＣＭＣ水溶液を１２部、ディゾルバーにおけるＣＭＣ水
溶液を９３部とした他は全て負極１と同様にして負極活
物質塗料を得た。
（負極３）負極１の負極塗料の連続式二軸混練装置での
ＣＭＣ水溶液を１０５部、ディゾルバーにおけるＣＭＣ
水溶液を０部とした他は全て負極１と同様にして負極活
物質塗料を得た。
（負極４）負極１の負極塗料の連続式二軸混練装置での
ＣＭＣ水溶液を２４５部、ディゾルバーにおけるＣＭＣ
水溶液を０部とした他は全て負極１と同様にして負極活
物質塗料を得た。
（負極５）
ＭＣＭＢ １００部
ＳＢＲ系樹脂 ５部
ＣＭＣ水溶液 １０５部
上記組成物をダブルプラネタリーミキサーで攪拌した
後、ホモジナイザにおいて、
吐出圧力 ４００ｋｇ／ｃｍ2
で吐出して負極活物質塗料を得た。
（負極６）負極５におけるホモジナイザの吐出圧力を５
０ｋｇ／ｃｍ2とした他は全て負極５と同様にして負極
活物質塗料を得た。
（負極７）負極５におけるホモジナイザの吐出圧力を７
００ｋｇ／ｃｍ2とした他は全て負極５と同様にして負
極活物質塗料を得た。
（負極８）
ＭＣＭＢ １００部
ＳＢＲ系樹脂 ５部
ＣＭＣ水溶液 ４５部
上記組成物を連続式二軸混練装置で混練し、ディゾルバ
ーで攪拌した後、ホモジナイザにおいて、
吐出圧力 ４００ｋｇ／ｃｍ2
で吐出して負極活物質塗料を得た。
（負極９）負極８の負極塗料の連続式二軸混練装置での
ＣＭＣ水溶液を４５部、ディゾルバーにおけるＣＭＣ水
溶液を６０部とした他は全て負極８と同様にして負極活
物質塗料を得た。
（負極１０）負極８の負極塗料の連続式二軸混練装置で
のＣＭＣ水溶液を１２部、ディゾルバーにおけるＣＭＣ
水溶液を９３部とした他は全て負極８と同様にして負極
活物質塗料を得た。
（負極１０）負極８におけるホモジナイザの吐出圧力を
５０ｋｇ／ｃｍ2とした他は全て負極８と同様にして負
極活物質塗料を得た。
（負極１１）負極８におけるホモジナイザの吐出圧力を
７００ｋｇ／ｃｍ2とした他は全て負極８と同様にして
負極活物質塗料を得た。
（負極１’）負極１の負極塗料の連続式二軸混練装置で
のＣＭＣ水溶液を３１５部、ディゾルバーにおけるＣＭ
Ｃ水溶液を０部とした他は全て負極１と同様にして負極
活物質塗料を得た。
（負極２’）負極１の負極塗料の連続式二軸混練装置で
のＣＭＣ水溶液を2.1部、ディゾルバーにおけるＣＭＣ
水溶液を102.9部とした他は全て負極１と同様にして負
極活物質塗料を得た。
（負極３’）負極５におけるホモジナイザの吐出圧力を
３０ｋｇ／ｃｍ2とした他は全て負極５と同様にして負
極活物質塗料を得た。
（負極４’）負極５におけるホモジナイザの吐出圧力を
８００ｋｇ／ｃｍ2とした他は全て負極５と同様にして
負極活物質塗料を得た。
（負極５’）負極８の負極塗料の連続式二軸混練装置で
のＣＭＣ水溶液を３１５部、ディゾルバーにおけるＣＭ
Ｃ水溶液を０部とした他は全て負極８と同様にして負極
活物質塗料を得た。
（負極６’）負極８におけるホモジナイザの吐出圧力を
３０ｋｇ／ｃｍ2とした他は全て負極８と同様にして負
極活物質塗料を得た。
（負極７’）負極８におけるホモジナイザの吐出圧力を
８００ｋｇ／ｃｍ2とした他は全て負極８と同様にして
負極活物質塗料を得た。The present invention will be described below with reference to examples. Preparation of Negative Electrode (Negative Electrode 1) MCMB 100 parts SBR-based resin 5 parts CMC aqueous solution 45 parts After kneading the above composition with a continuous biaxial kneading device, 60 parts of CMC aqueous solution was added in a dissolver to obtain a negative electrode active material paint. It was (Negative electrode 2) A negative electrode active material coating material was obtained in the same manner as in the negative electrode 1 except that the CMC aqueous solution in the continuous biaxial kneading device for the negative electrode 1 was 12 parts and the CMC aqueous solution in the dissolver was 93 parts. (Negative electrode 3) 105 parts of CMC aqueous solution in a continuous biaxial kneading device for negative electrode paint of negative electrode 1, CMC in dissolver
A negative electrode active material coating material was obtained in the same manner as in the negative electrode 1 except that the aqueous solution was 0 part. (Negative electrode 4) 245 parts of CMC aqueous solution in a continuous biaxial kneading device for negative electrode paint of negative electrode 1, CMC in dissolver
A negative electrode active material coating material was obtained in the same manner as in the negative electrode 1 except that the aqueous solution was 0 part. (Negative electrode 5) MCMB 100 parts SBR-based resin 5 parts CMC aqueous solution 105 parts After stirring the above composition with a double planetary mixer, a homogenizer was discharged at a discharge pressure of 400 kg / cm 2 to obtain a negative electrode active material paint. (Negative electrode 6) The discharge pressure of the homogenizer at the negative electrode 5 is set to 5
A negative electrode active material coating material was obtained in the same manner as in the negative electrode 5 except that the amount was 0 kg / cm 2 . (Negative electrode 7) The discharge pressure of the homogenizer at the negative electrode 5 is set to 7
A negative electrode active material coating material was obtained in the same manner as the negative electrode 5 except that the amount was set to 00 kg / cm 2 . (Negative electrode 8) MCMB 100 parts SBR-based resin 5 parts CMC aqueous solution 45 parts The above composition was kneaded by a continuous biaxial kneading device, stirred by a dissolver, and then discharged by a homogenizer at a discharge pressure of 400 kg / cm 2 to obtain a negative electrode. An active material paint was obtained. (Negative electrode 9) A negative electrode active material coating material was obtained in the same manner as the negative electrode 8 except that 45 parts of the CMC aqueous solution in the continuous biaxial kneading device for the negative electrode coating material of the negative electrode 8 and 60 parts of the CMC aqueous solution in the dissolver were used. (Negative electrode 10) 12 parts of CMC aqueous solution in a continuous biaxial kneading device for negative electrode paint of negative electrode 8, CMC in dissolver
A negative electrode active material coating material was obtained in the same manner as in the negative electrode 8 except that the amount of the aqueous solution was 93 parts. (Negative electrode 10) A negative electrode active material coating material was obtained in the same manner as in the negative electrode 8 except that the discharge pressure of the homogenizer in the negative electrode 8 was 50 kg / cm 2 . (Negative Electrode 11) A negative electrode active material coating material was obtained in the same manner as in the negative electrode 8 except that the homogenizer discharge pressure in the negative electrode 8 was 700 kg / cm 2 . (Negative electrode 1 ′) 315 parts of CMC aqueous solution in a continuous biaxial kneading device for negative electrode paint of negative electrode 1, CM in dissolver
A negative electrode active material coating material was obtained in the same manner as in the negative electrode 1 except that the C aqueous solution was set to 0 part. (Negative electrode 2 ') 2.1 parts of CMC aqueous solution in a continuous biaxial kneading device for negative electrode paint of negative electrode 1, CMC in dissolver
A negative electrode active material coating material was obtained in the same manner as in the negative electrode 1 except that the aqueous solution was changed to 102.9 parts. (Negative electrode 3 ′) A negative electrode active material coating material was obtained in the same manner as in the negative electrode 5 except that the discharge pressure of the homogenizer in the negative electrode 5 was 30 kg / cm 2 . (Negative electrode 4 ′) A negative electrode active material coating material was obtained in the same manner as the negative electrode 5 except that the discharge pressure of the homogenizer in the negative electrode 5 was 800 kg / cm 2 . (Negative electrode 5 ′) 315 parts of CMC aqueous solution in a continuous biaxial kneading device for negative electrode paint of negative electrode 8, CM in dissolver
A negative electrode active material coating material was obtained in the same manner as in the negative electrode 8 except that the C aqueous solution was set to 0 part. (Negative electrode 6 ′) A negative electrode active material coating material was obtained in the same manner as in the negative electrode 8 except that the homogenizer discharge pressure in the negative electrode 8 was set to 30 kg / cm 2 . (Negative electrode 7 ′) A negative electrode active material coating material was obtained in the same manner as the negative electrode 8 except that the homogenizer discharge pressure of the negative electrode 8 was 800 kg / cm 2 .
【００２６】得られた負極１から７’の各負極用塗料を
２０．０μｍ厚の銅箔両面に塗布、乾燥し、必要に応じ
てカレンダー処理して全厚が０．２ｍｍ厚で塗膜密度が
１．３ｇ／ｃｍ3から１．６ｇ／ｃｍ3の負極層を作製し
た。Each of the obtained negative electrode coating materials for negative electrodes 1 to 7'is applied on both sides of a copper foil having a thickness of 20.0 μm, dried, and calendered if necessary to give a coating film density of 0.2 mm in total thickness. Of 1.3 g / cm 3 to 1.6 g / cm 3 was prepared.
【００２７】正極の作製
（正極１）
ＬｉＣｏＯ2 １００部
導電性カーボンブラック １部
フッ素系ＰＴＦＥ樹脂 ８部
ＣＭＣ水溶液 ４７部
上記組成物を連続式二軸混練装置で混練した後、ディゾ
ルバーにおいて、
ＣＭＣ水溶液 ２６部
添加し攪拌した後に、ホモジナイザを用いて分散して正
極活物質塗料を得た。Preparation of Positive Electrode (Positive Electrode 1) LiCoO 2 100 parts Conductive carbon black 1 part Fluorine-based PTFE resin 8 parts CMC aqueous solution 47 parts The above composition was kneaded in a continuous biaxial kneading device and then in a dissolver, a CMC aqueous solution. After adding 26 parts and stirring, the mixture was dispersed using a homogenizer to obtain a positive electrode active material coating material.
【００２８】得られた正極用塗料を２０μｍ厚のアルミ
箔両面に塗布、乾燥し、全厚が０．２ｍｍ厚で塗膜密度
が３．４ｇ／ｃｍ3から３．７ｇ／ｃｍ3の正極層を作製
した。The obtained positive electrode coating material is applied to both sides of an aluminum foil having a thickness of 20 μm and dried, and the total thickness is 0.2 mm and the coating film density is from 3.4 g / cm 3 to 3.7 g / cm 3 Was produced.
【００２９】（表１）に、得られた負極、正極の製造条
件を示す。Table 1 shows the manufacturing conditions of the obtained negative electrode and positive electrode.
【００３０】[0030]
【表１】 [Table 1]
【００３１】（実施例１）正極１と負極１をセパレータ
を介して巻き込んでＡ形リチウム二次電池を作成した。Example 1 A positive electrode 1 and a negative electrode 1 were wound with a separator interposed therebetween to prepare an A-type lithium secondary battery.
【００３２】（実施例２）正極１と負極２をセパレータ
を介して巻き込んでＡ形リチウム二次電池を作成した。(Example 2) A positive electrode 1 and a negative electrode 2 were wound with a separator interposed therebetween to prepare an A-type lithium secondary battery.
【００３３】（実施例３）正極１と負極３をセパレータ
を介して巻き込んでＡ形リチウム二次電池を作成した。(Example 3) A positive electrode 1 and a negative electrode 3 were wound with a separator interposed therebetween to prepare an A-type lithium secondary battery.
【００３４】（実施例４）正極１と負極４をセパレータ
を介して巻き込んでＡ形リチウム二次電池を作成した。Example 4 An A-type lithium secondary battery was prepared by winding the positive electrode 1 and the negative electrode 4 through a separator.
【００３５】（実施例５）正極１と負極５をセパレータ
を介して巻き込んでＡ形リチウム二次電池を作成した。Example 5 An A-type lithium secondary battery was prepared by winding the positive electrode 1 and the negative electrode 5 with a separator interposed therebetween.
【００３６】（実施例６）正極１と負極６をセパレータ
を介して巻き込んでＡ形リチウム二次電池を作成した。Example 6 An A-type lithium secondary battery was prepared by winding the positive electrode 1 and the negative electrode 6 with a separator interposed therebetween.
【００３７】（実施例７）正極１と負極７をセパレータ
を介して巻き込んでＡ形リチウム二次電池を作成した。(Example 7) A positive electrode 1 and a negative electrode 7 were wound with a separator interposed therebetween to prepare an A-type lithium secondary battery.
【００３８】（実施例８）正極１と負極８をセパレータ
を介して巻き込んでＡ形リチウム二次電池を作成した。Example 8 A positive electrode 1 and a negative electrode 8 were wound with a separator interposed therebetween to prepare an A-type lithium secondary battery.
【００３９】（実施例９）正極１と負極９をセパレータ
を介して巻き込んでＡ形リチウム二次電池を作成した。Example 9 An A type lithium secondary battery was prepared by winding the positive electrode 1 and the negative electrode 9 with a separator interposed therebetween.
【００４０】（実施例１０）正極１と負極１０をセパレ
ータを介して巻き込んでＡ形リチウム二次電池を作成し
た。Example 10 An A-type lithium secondary battery was prepared by winding the positive electrode 1 and the negative electrode 10 with a separator interposed therebetween.
【００４１】（実施例１１）正極１と負極１１をセパレ
ータを介して巻き込んでＡ形リチウム二次電池を作成し
た。Example 11 A positive electrode 1 and a negative electrode 11 were wound with a separator interposed therebetween to prepare an A-type lithium secondary battery.
【００４２】（実施例１２）正極１と負極１２をセパレ
ータを介して巻き込んでＡ形リチウム二次電池を作成し
た。Example 12 An A-type lithium secondary battery was prepared by winding the positive electrode 1 and the negative electrode 12 with a separator interposed therebetween.
【００４３】（比較例１）正極１と負極１’をセパレー
タを介して巻き込んでＡ形リチウム二次電池を作成し
た。(Comparative Example 1) A positive electrode 1 and a negative electrode 1'were wound with a separator interposed therebetween to prepare an A type lithium secondary battery.
【００４４】（比較例２）正極１と負極２’をセパレー
タを介して巻き込んでＡ形リチウム二次電池を作成し
た。(Comparative Example 2) A positive electrode 1 and a negative electrode 2'were wound with a separator interposed therebetween to prepare an A-type lithium secondary battery.
【００４５】（比較例３）正極１と負極３’をセパレー
タを介して巻き込んでＡ形リチウム二次電池を作成し
た。(Comparative Example 3) A positive electrode 1 and a negative electrode 3'were wound with a separator interposed therebetween to prepare an A type lithium secondary battery.
【００４６】（比較例４）正極１と負極４’をセパレー
タを介して巻き込んでＡ形リチウム二次電池を作成し
た。(Comparative Example 4) A positive electrode 1 and a negative electrode 4'were wound with a separator interposed therebetween to prepare an A type lithium secondary battery.
【００４７】（比較例５）正極１と負極５’をセパレー
タを介して巻き込んでＡ形リチウム二次電池を作成し
た。(Comparative Example 5) A positive electrode 1 and a negative electrode 5'were wound with a separator interposed therebetween to prepare an A type lithium secondary battery.
【００４８】（比較例６）正極１と負極６’をセパレー
タを介して巻き込んでＡ形リチウム二次電池を作成し
た。(Comparative Example 6) A positive electrode 1 and a negative electrode 6'were wound with a separator interposed therebetween to prepare an A type lithium secondary battery.
【００４９】（比較例７）正極１と負極７’をセパレー
タを介して巻き込んでＡ形リチウム二次電池を作成し
た。表２）には、本発明の実施例及び比較例の極板組み
合わせの一覧を示す。(Comparative Example 7) A positive electrode 1 and a negative electrode 7'were wound with a separator interposed therebetween to prepare an A type lithium secondary battery. Table 2) shows a list of electrode plate combinations of Examples of the present invention and Comparative Examples.
【００５０】[0050]
【表２】 [Table 2]
【００５１】得られた各試料について以下の評価を行っ
た。比較サンプルとして松下電池工業（株）製Ａ形リチ
ウム二次電池１７５００を用意した。
（１）放電容量［％］
室温において、一定電流（１００ｍＡ）、終止電圧
（４．１Ｖ）で充電を完了した二次電池を一定電流（５
００ｍＡ）で放電して、放電開始から低下する電圧が終
止電圧（３．０Ｖ）に達した時間を放電時間として、放
電電流値と放電時間の積から求めた放電容量の、比較サ
ンプルの放電容量に対する比。（図２）は放電容量測定
を行ったときの放電電圧曲線を示す図である。
（２）サイクル寿命［％］
室温において、一定条件（放電：電流５００ｍＡ終止電
圧３．０Ｖ、充電：電流１００ｍＡ終止電圧４．１Ｖ）
で充放電を繰り返して放電容量を測定し、初期放電容量
の９０％になったときの充放電回数の、比較サンプルの
回数に対する比。The following evaluations were performed on each of the obtained samples. As a comparative sample, A-type lithium secondary battery 17500 manufactured by Matsushita Battery Industrial Co., Ltd. was prepared. (1) Discharge capacity [%] At room temperature, a secondary battery that had been charged at a constant current (100 mA) and a cutoff voltage (4.1 V) was charged at a constant current (5 V).
The discharge capacity of the comparative sample is the discharge capacity obtained from the product of the discharge current value and the discharge time, where the discharge time is the time at which the voltage that decreases from the start of discharge reaches the final voltage (3.0 V). Ratio to. FIG. 2 is a diagram showing a discharge voltage curve when the discharge capacity is measured. (2) Cycle life [%] At room temperature, constant conditions (discharge: current 500 mA, final voltage 3.0 V, charge: current 100 mA, final voltage 4.1 V)
The discharge capacity was measured by repeating charge and discharge with the ratio of the number of times of charge and discharge when it reached 90% of the initial discharge capacity to the number of times of the comparative sample.
【００５２】（図３）はサイクル寿命測定を行ったとき
の充放電回数に対する放電容量変化を示す図である。FIG. 3 is a diagram showing the change in discharge capacity with respect to the number of times of charge and discharge when the cycle life was measured.
【００５３】（表３）に本測定結果の一覧を示す。Table 3 shows a list of the measurement results.
【００５４】[0054]
【表３】 [Table 3]
【００５５】[0055]
【発明の効果】以上詳述した様に本発明によれば、上記
した構成すなわち炭素質材料を主成分とする負極活物質
塗料を連続式二軸混練装置において混練すること、ある
いは負極活物質塗料を超高圧分散装置においてオリフィ
ス状細孔から吐出させ対面する板面に衝突させて分散す
ること、あるいは負極活物質塗料を連続式二軸混練装置
において混練した後に、超高圧分散装置においてオリフ
ィス状細孔から吐出して対面する板面に衝突させて分散
することにより、負極の高密度化と均一化が可能となり
放電特性に優れたリチウム二次電池を提供することがで
きる。As described above in detail, according to the present invention, the negative electrode active material coating material having the above-mentioned constitution, that is, the carbonaceous material as a main component is kneaded in the continuous biaxial kneading device, or the negative electrode active material coating material is kneaded. Is discharged from the orifice-shaped pores in the ultra-high pressure dispersing device to collide with the facing plate surface to disperse, or the negative electrode active material paint is kneaded in the continuous biaxial kneading device and then the orifice-shaped fine particles in the ultra-high pressure dispersing device. By discharging from the holes and colliding with the facing plate surface to disperse them, the density and uniformity of the negative electrode can be increased, and a lithium secondary battery having excellent discharge characteristics can be provided.
【００５６】なお以上の説明では円筒型リチウム二次電
池を主に用いて説明したが、コイン型二次電池でも応用
することができることはもちろんである。In the above description, a cylindrical lithium secondary battery was mainly used, but it goes without saying that a coin type secondary battery can also be applied.
【図１】本発明の実施例の塗料化プロセスと塗工プロセ
スを示す図FIG. 1 is a diagram showing a coating process and a coating process according to an embodiment of the present invention.
【図２】本発明の実施例の二次電池を用いて放電容量測
定を行ったときの放電電圧曲線を示す図FIG. 2 is a diagram showing a discharge voltage curve when a discharge capacity is measured using the secondary battery of the example of the present invention.
【図３】本発明の実施例の二次電池を用いてサイクル寿
命測定を行ったときの放電容量を示す図FIG. 3 is a diagram showing the discharge capacity when cycle life measurement is performed using the secondary battery of the example of the present invention.
１ 連続式二軸混練装置 ２ ディゾルバー ３ ホモジナイザ分散装置 ４ａ、４ｂ 塗工装置 ５ カレンダー装置 ６ ホッパ ７ａ 活物質塗料 ７ｂ 溶剤あるいは別分散した塗料 ７ｃ 活物質塗料 ８ａ、８ｂ 混練部 ９ カレンダーロール １０ａ 巻き出し部 １０ｂ 巻き取り部 １１ スクリューバトル １２ オリフィス状細孔 1 Continuous twin-screw kneader 2 dissolvers 3 Homogenizer Disperser 4a, 4b Coating device 5 Calendar device 6 hoppers 7a Active material paint 7b Solvent or other dispersion paint 7c Active material paint 8a, 8b kneading section 9 calendar rolls 10a Unwinding section 10b winding section 11 screw battle 12 Orifice-shaped pore
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−215761（ＪＰ，Ａ) 特開 平１−148335（ＪＰ，Ａ) 特開 昭55−139824（ＪＰ，Ａ) 実開 昭59−48810（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 4/02 - 4/04 H01M 10/40 B01F 7/00 - 7/32 ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-6-215761 (JP, A) JP-A 1-148335 (JP, A) JP-A 55-139824 (JP, A) Actual development Sho-59- 48810 (JP, U) (58) Fields surveyed (Int.Cl. 7 , DB name) H01M 4/02-4/04 H01M 10/40 B01F 7/ 00-7/32
Claims (3)
（但し、Ｍは１種以上の遷移金属を表し、０．０５≦Ｘ
≦１．１０である。）を主成分とする正極活物質層を形
成し、前記電極板とは異なる電極板の少なくとも一方の
面に炭素質材料を主成分とする負極活物質層を形成して
なるリチウム二次電池の製造方法であって、前記負極活
物質層を形成する前記負極活物質塗料を、スクリューパ
ドルを組み合わせてなる連続式二軸混練装置により混練
し、前記負極活物質塗料の全塗料重量に対する全固形分
重量比を、３０％以上、９０％以下とすることを特徴と
するリチウム二次電池の製造方法。1. A Li X MO 2 film on at least one surface of an electrode plate.
(However, M represents one or more kinds of transition metals, and 0.05 ≦ X
≦ 1.10. ) Is formed as a main component of a positive electrode active material layer, and a negative electrode active material layer containing a carbonaceous material as a main component is formed on at least one surface of an electrode plate different from the electrode plate. In the manufacturing method, the negative electrode active material coating material for forming the negative electrode active material layer is kneaded by a continuous biaxial kneading device formed by combining screw paddles, and the total solid content relative to the total coating weight of the negative electrode active material coating material. A method for manufacturing a lithium secondary battery, wherein the weight ratio is 30% or more and 90% or less.
（但し、Ｍは１種以上の遷移金属を表し、０．０５≦Ｘ
≦１．１０である。）を主成分とする正極活物質層を形
成し、前記電極板とは異なる電極板の少なくとも一方の
面に炭素質材料を主成分とする負極活物質層を形成して
なるリチウム二次電池の製造方法であって、前記負極活
物質層を形成する負極活物質塗料を、オリフィス状細孔
と前記オリフィス状細孔と対面する板面からなる超高圧
分散装置により分散し、前記負極活物質塗料の全塗料重
量に対する全固形分重量比が、５０％以上、７０％以下
とし、かつ、前記オリフィス状細孔から前記負極活物質
塗料を５０ｋｇ／ｃｍ 2 以上、７００ｋｇ／ｃｍ 2 以下の
圧力で吐出させることを特徴とするリチウム二次電池の
製造方法。2. Li X MO 2 on at least one surface of the electrode plate.
(However, M represents one or more kinds of transition metals, and 0.05 ≦ X
≦ 1.10. ) Is formed as a main component of a positive electrode active material layer, and a negative electrode active material layer containing a carbonaceous material as a main component is formed on at least one surface of an electrode plate different from the electrode plate. A method of manufacturing, wherein the negative electrode active material coating material forming the negative electrode active material layer is dispersed by an ultrahigh pressure dispersion device composed of orifice-shaped pores and a plate surface facing the orifice-shaped pores, and the negative electrode active material coating material is dispersed. Total paint weight
The total solid content weight ratio to the amount is 50% or more and 70% or less
And, from the orifice-shaped pores, the negative electrode active material
Paint 50kg / cm 2 or more, 700kg / cm 2 or less of
A method for manufacturing a lithium secondary battery, which comprises discharging with pressure .
（（但し、Ｍは１種以上の遷移金属を表し、０．０５≦
Ｘ≦１．１０である。）を主成分とする正極活物質層を
形成し、前記電極板とは異なる電極板の少なくとも一方
の面に炭素質材料を主成分とする負極活物質層を形成し
てなるリチウム二次電池の製造方法であって、前記負極
活物質層を形成する負極活物質塗料を、スクリューパド
ルを組み合わせてなる連続式二軸混練装置により混練し
た後に、オリフィス状細孔と前記オリフィス状細孔と対
面する板面からなる超高圧分散装置により分散し、前記
連続式二軸混練装置において前記負極活物質塗料の全塗
料重量に対する全固形分重量比が、３０％以上、９０％
以下で混練し、かつ、超高圧分散装置においてオリフィ
ス状細孔から５０ｋｇ／ｃｍ 2 以上、７００ｋｇ／ｃｍ 2
以下の圧力で前記負 極活物質塗料を吐出させることを特
徴とするリチウム二次電池の製造方法。3. Li X MO 2 on at least one surface of the electrode plate.
(However, M represents one or more kinds of transition metals, and 0.05 ≦
X ≦ 1.10. ) Is formed as a main component of a positive electrode active material layer, and a negative electrode active material layer containing a carbonaceous material as a main component is formed on at least one surface of an electrode plate different from the electrode plate. A method of manufacturing, wherein the negative electrode active material coating material for forming the negative electrode active material layer is kneaded by a continuous biaxial kneading device in which screw paddles are combined, and then the orifice-shaped pores and the orifice-shaped pores are faced with each other. Dispersed by an ultra-high pressure dispersion device consisting of a plate surface ,
Full coating of the negative electrode active material paint in a continuous biaxial kneading device
The total solid content weight ratio to the material weight is 30% or more, 90%
Knead below and use the ultra high pressure disperser
50kg / cm 2 or more, 700kg / cm 2
A method for manufacturing a lithium secondary battery , comprising discharging the negative electrode active material coating material under the following pressure .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26235294A JP3371573B2 (en) | 1994-10-26 | 1994-10-26 | Manufacturing method of lithium secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26235294A JP3371573B2 (en) | 1994-10-26 | 1994-10-26 | Manufacturing method of lithium secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08124598A JPH08124598A (en) | 1996-05-17 |
| JP3371573B2 true JP3371573B2 (en) | 2003-01-27 |
Family
ID=17374557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26235294A Expired - Fee Related JP3371573B2 (en) | 1994-10-26 | 1994-10-26 | Manufacturing method of lithium secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3371573B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11102844A (en) * | 1997-07-28 | 1999-04-13 | Matsushita Electric Ind Co Ltd | Electrical double layer capacitor and manufacture thereof |
| EP1018749B1 (en) * | 1998-07-17 | 2002-10-02 | Murata Manufacturing Co., Ltd. | Method for producing conductive composition and conductive composition |
| JP2009252683A (en) * | 2008-04-10 | 2009-10-29 | Sumitomo Chemical Co Ltd | Manufacturing method of positive electrode body for nonaqueous electrolyte secondary battery |
| JP2014078357A (en) * | 2012-10-09 | 2014-05-01 | Toyota Motor Corp | Method for producing electrode paste |
-
1994
- 1994-10-26 JP JP26235294A patent/JP3371573B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08124598A (en) | 1996-05-17 |
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