JPH05174810A - Battery electrode and battery - Google Patents
Battery electrode and batteryInfo
- Publication number
- JPH05174810A JPH05174810A JP3353603A JP35360391A JPH05174810A JP H05174810 A JPH05174810 A JP H05174810A JP 3353603 A JP3353603 A JP 3353603A JP 35360391 A JP35360391 A JP 35360391A JP H05174810 A JPH05174810 A JP H05174810A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- carbon powder
- positive electrode
- electrode
- negative electrode
- 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.)
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Classifications
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- 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
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- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電池用電極に係わり、
詳しくは電池用電極の電解液に対する濡れ性（含液性）
の改良に関する。FIELD OF THE INVENTION The present invention relates to a battery electrode,
Specifically, the wettability of the battery electrode to the electrolyte (liquid containing property)
Regarding the improvement of.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】リチウ
ム電池などの非水系電池の正極の活物質としては、Ｌｉ
ＮｉＯ2 、ＬｉＣｏＯ2 等の金属酸化物の粉末が使用さ
れているが、金属酸化物は非導電性物質であるため、こ
れに導電性を付与すべく導電剤が配合されて正極合剤と
して使用されている。2. Description of the Related Art Lithium batteries and other non-aqueous batteries have a positive electrode active material such as Li.
Although powders of metal oxides such as NiO 2 and LiCoO 2 are used, since the metal oxides are non-conductive substances, a conductive agent is blended to impart conductivity to the powder and used as a positive electrode mixture. Has been done.
【０００３】すなわち、非水系電池の正極は、先ず粉末
状の活物質と、炭素粉末からなる導電剤とを、フッ素樹
脂等の結着剤と混練して正極合剤を作製し、次いでこの
正極合剤を集電体（芯体）に圧延等の手段により固着さ
せることにより作製されている。この種の電極の場合、
電極反応は活物質と電解液との接触界面で起こるため、
活物質の全表面のうち電解液と直接接触する部分（以
下、「濡れ部」と称する）のみが電極反応に関与するこ
ととなる。すなわち、その電解液で濡れる部分の面積が
活物質の実効表面積となる。That is, in the positive electrode of a non-aqueous battery, first, a powdered active material and a conductive agent made of carbon powder are kneaded with a binder such as a fluororesin to prepare a positive electrode mixture, and then this positive electrode is prepared. It is produced by fixing the mixture on a current collector (core) by means such as rolling. For this type of electrode,
Since the electrode reaction occurs at the contact interface between the active material and the electrolytic solution,
Only the part of the entire surface of the active material that is in direct contact with the electrolytic solution (hereinafter referred to as the "wetting part") is involved in the electrode reaction. That is, the area of the portion wetted by the electrolytic solution becomes the effective surface area of the active material.
【０００４】しかしながら、炭素粉末は水系、非水系電
解液を問わず総じて電解液に対する濡れ性が良くない。
かかる濡れ性の良くない炭素粉末をそのまま導電剤とし
て配合すると、共存する活物質の濡れ性もまた良くない
ものとなる。而して、電池容量の小さい電池しか得難く
なる。また、活物質の濡れ性が良くないと、正極におけ
る電極反応が活物質の表面の一部すなわち上記濡れ部で
集中的に起こるようになり、濡れ部の活物質の劣化速度
が速くなる。このため、二次電池用電極として使用した
場合、サイクル特性の良くない電池しか得難くなる。However, carbon powder, whether it is an aqueous or non-aqueous electrolytic solution, generally has poor wettability with the electrolytic solution.
If such a carbon powder having poor wettability is blended as a conductive agent as it is, the wettability of the coexisting active material also becomes poor. Therefore, it becomes difficult to obtain only a battery having a small battery capacity. In addition, if the wettability of the active material is not good, the electrode reaction in the positive electrode will be concentrated on a part of the surface of the active material, that is, the wetted portion, and the deterioration rate of the active material in the wetted portion will be accelerated. Therefore, when it is used as an electrode for a secondary battery, only a battery having poor cycle characteristics can be obtained.
【０００５】本発明は、以上の事情に鑑みなされたもの
であって、その目的とするところは、優れた電池特性を
発現させ得る電池用電極及びそれを正極に用いてなる電
池を提供するにある。The present invention has been made in view of the above circumstances, and an object thereof is to provide a battery electrode capable of exhibiting excellent battery characteristics and a battery using the same as a positive electrode. is there.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
の本発明に係る電池用電極は、活物質と、導電剤として
の炭素粉末と、結着剤とからなる正極合剤を集電体に固
着させてなる電池用電極であって、前記炭素粉末として
界面活性剤を表面に吸着させた表面改質炭素粉末が使用
されていることを特徴とする。Means for Solving the Problems In order to achieve the above object, a battery electrode according to the present invention comprises a positive electrode mixture composed of an active material, carbon powder as a conductive agent, and a binder. The surface-modified carbon powder having a surface adsorbed with a surfactant is used as the carbon powder.
【０００７】本発明に係る電池用電極は、たとえば非水
系電解液リチウム電池の正極として好適に使用され得る
ものである。The battery electrode according to the present invention can be suitably used, for example, as a positive electrode of a non-aqueous electrolyte lithium battery.
【０００８】本発明においては、導電剤たる炭素粉末と
して、界面活性剤を吸着させたものが用いられる。In the present invention, a carbon powder as a conductive agent is one in which a surfactant is adsorbed.
【０００９】炭素粉末としては、カーボンブラック、ア
セチレンブラック、ケッチンブラックが例示される。こ
れらの導電性粉末は一種単独を用いてもよく、必要に応
じて二種以上を併用してもよい。Examples of the carbon powder include carbon black, acetylene black and Ketchin black. These conductive powders may be used alone or in combination of two or more if necessary.
【００１０】界面活性剤としては、炭素粉末の電解液に
対する濡れ性を改良し得るものであれば特に制限され
ず、たとえば高級脂肪酸エステル、アルキル硫酸塩等の
陰イオン系界面活性剤、高級アミンハロゲン酸塩、第４
アンモニウム塩等の陽イオン系界面活性剤、ポリエチレ
ングリコールアルキルエーテル、ポリエチレングリコー
ル脂肪酸エステル等の非イオン系界面活性剤など、種々
の界面活性剤を使用することができる。なかでも、ポリ
エチレングリコールステアレート、ポリオキシエチレン
ノニルフェノールエーテル、高級脂肪酸ペンタエリスリ
トール又はそのモノ脂肪酸エステルが好適なものとして
挙げられる。The surfactant is not particularly limited as long as it can improve the wettability of the carbon powder to the electrolytic solution, and examples thereof include anionic surfactants such as higher fatty acid esters and alkylsulfates, and higher amine halogens. Acid salt, fourth
Various surfactants such as a cationic surfactant such as ammonium salt and a nonionic surfactant such as polyethylene glycol alkyl ether and polyethylene glycol fatty acid ester can be used. Among them, polyethylene glycol stearate, polyoxyethylene nonylphenol ether, higher fatty acid pentaerythritol or monofatty acid ester thereof are preferred.
【００１１】炭素粉末の界面活性剤吸着量は、炭素粉末
１００重量部に対して１０重量部未満が好ましく、０．
５〜６重量部の範囲がより好ましい。吸着量が１０重量
部以上であると、導電剤の添加量が相対的に減少し、正
極合剤の導電性が低下して電池容量が低下するので好ま
しくない。The amount of the surface active agent adsorbed on the carbon powder is preferably less than 10 parts by weight per 100 parts by weight of the carbon powder.
A range of 5 to 6 parts by weight is more preferable. When the amount of adsorption is 10 parts by weight or more, the amount of the conductive agent added is relatively decreased, the conductivity of the positive electrode mixture is reduced, and the battery capacity is reduced, which is not preferable.
【００１２】界面活性剤を炭素粉末に吸着させる方法と
しては、たとえば界面活性剤を水やアルコール類等の低
沸点溶媒に分散又は溶解させた液に炭素粉末を浸漬した
後、溶媒を蒸散させる方法が挙げられるが、炭素粉末に
界面活性剤を有効に吸着させ得る方法であれば特に制限
なく用いることができる。As a method for adsorbing the surfactant on the carbon powder, for example, the carbon powder is immersed in a liquid in which the surfactant is dispersed or dissolved in a low boiling point solvent such as water or alcohol, and then the solvent is evaporated. However, any method can be used without particular limitation as long as it is a method capable of effectively adsorbing the surfactant on the carbon powder.
【００１３】界面活性剤を吸着させた炭素粉末は、活物
質及びＰＴＦＥ（ポリテトラフルオロエチレン）、ＰＶ
ｄＦ（ポリ二フッ化ビニリデン）等の結着剤と混練し
て、正極合剤として使用される。The carbon powder having the surface active agent adsorbed is composed of an active material, PTFE (polytetrafluoroethylene), PV
It is kneaded with a binder such as dF (polyvinylidene difluoride) and used as a positive electrode mixture.
【００１４】本発明における活物質としては、特に制限
されないが、たとえば非水系電解液電池の正極活物質と
しては、ＬｉＣｏＯ2 、ＬｉＭｎ2 Ｏ4 、ＬｉＭｎ
Ｏ2 、ＬｉＮｉＯ2 、ＭｎＯ2 、ＣｕＯが例示される。
これらの活物質は一種単独を用いてもよく、必要に応じ
て二種以上を併用してもよい。The active material in the present invention is not particularly limited, but for example, as the positive electrode active material of a non-aqueous electrolyte battery, LiCoO 2 , LiMn 2 O 4 and LiMn are used.
O 2 , LiNiO 2 , MnO 2 and CuO are exemplified.
These active materials may be used alone or in combination of two or more if necessary.
【００１５】[0015]
【作用】本発明に係る電池用電極は、導電剤として界面
活性剤を吸着させた炭素粉末が使用されているので、正
極の電解液に対する濡れ性が良好であり、電極反応にお
ける実効表面積が大きい。このため、正極における電極
反応が活物質の表面で均一に行われるようになり、活物
質の劣化速度が遅くなる。In the battery electrode according to the present invention, the carbon powder having the surfactant adsorbed as the conductive agent is used, so that the wettability of the positive electrode with respect to the electrolytic solution is good and the effective surface area in the electrode reaction is large. .. For this reason, the electrode reaction in the positive electrode is carried out uniformly on the surface of the active material, and the deterioration rate of the active material becomes slow.
【００１６】[0016]
【実施例】以下、本発明を実施例に基づいてさらに詳細
に説明するが、本発明は下記実施例により何ら限定され
るものではなく、その要旨を変更しない範囲において適
宜変更して実施することが可能なものである。EXAMPLES The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited to the following examples, and various modifications can be made without departing from the scope of the invention. Is possible.
【００１７】（実施例１）本発明に係る電池用電極を正
極とする円筒型の非水系電解液二次電池を作製した。 〔正極の作製〕炭酸コバルトと炭酸リチウムとをＣｏ：
Ｌｉの原子比１：１で混合した後、空気中で９００°Ｃ
で２０時間熱処理してＬｉＣｏＯ2 を得た。このようし
て得た活物質としてのＬｉＣｏＯ2 に、導電剤としての
表面改質炭素粉末と、結着剤としてのＰＴＦＥとを、重
量比９０：６：４の比率で混合して正極合剤を得た。こ
の正極合剤を集電体としてのアルミニウムの箔に圧延
し、２５０°Ｃで２時間真空下で熱処理して正極を作製
した。上記表面改質炭素粉末としては、アセチレンブラ
ック１００重量部に対してポリエチレングリコールステ
アレートを１重量部吸着させたものを使用した。Example 1 A cylindrical non-aqueous electrolyte secondary battery having the battery electrode according to the present invention as a positive electrode was produced. [Preparation of Positive Electrode] Cobalt carbonate and lithium carbonate were converted into Co:
After mixing Li at an atomic ratio of 1: 1 at 900 ° C in air
Then, heat treatment was performed for 20 hours to obtain LiCoO 2 . Thus obtained LiCoO 2 as an active material, surface-modified carbon powder as a conductive agent, and PTFE as a binder were mixed in a weight ratio of 90: 6: 4 to prepare a positive electrode mixture. Got This positive electrode mixture was rolled into an aluminum foil as a current collector and heat-treated under vacuum at 250 ° C. for 2 hours to produce a positive electrode. As the surface-modified carbon powder, 100 parts by weight of acetylene black and 1 part by weight of polyethylene glycol stearate adsorbed were used.
【００１８】〔負極の作製〕４００メッシュパスの黒鉛
に、結着剤としてのＰＴＦＥを、重量比９５：５の比率
で混合し、集電体としてのアルミニウムの箔に圧延し、
２５０°Ｃで２時間真空下で熱処理して、負極を作製し
た。[Preparation of Negative Electrode] 400 mesh pass graphite was mixed with PTFE as a binder in a weight ratio of 95: 5 and rolled into an aluminum foil as a current collector.
It heat-processed under vacuum at 250 degreeC for 2 hours, and produced the negative electrode.
【００１９】〔非水系電解液の調製〕エチレンカーボネ
ートとジメチルカーボネートとの体積混合比１：１の混
合溶媒に、ＬｉＰＦ6 を１モル／リットル溶かして非水
系電解液を調製した。[Preparation of Non-Aqueous Electrolyte Solution] A non-aqueous electrolyte solution was prepared by dissolving 1 mol / liter of LiPF 6 in a mixed solvent of ethylene carbonate and dimethyl carbonate at a volume mixing ratio of 1: 1.
【００２０】〔電池の作製〕以上の正負両極及び非水系
電解液を用いて円筒型の二次電池ＢＡ１（電池寸法：直
径１４．２ｍｍ、高さ：５０．０ｍｍ）を作製した。な
お、ポリプロピレン製の微孔性薄膜をセパレータとして
用いた。[Production of Battery] A cylindrical secondary battery BA1 (battery size: diameter 14.2 mm, height: 50.0 mm) was produced using the positive and negative electrodes and the non-aqueous electrolyte solution described above. A polypropylene microporous thin film was used as a separator.
【００２１】図１は作製した電池ＢＡ１の断面図であ
り、同図に示す電池ＢＡ１は、正極１及び負極２、これ
ら両電極を離隔するセパレータ３、正極リード４、負極
リード５、正極外部端子６、負極缶７などからなる。正
極１及び負極２は非水電解液が注入されたセパレータ３
を介して渦巻き状に巻き取られた状態で負極缶７内に収
容されており、正極１は正極リード４を介して正極外部
端子６に、また負極２は負極リード５を介して負極缶７
に接続され、電池ＢＡ１内部で生じた化学エネルギーを
電気エネルギーとして外部へ取り出し得るようになって
いる。FIG. 1 is a cross-sectional view of the manufactured battery BA1. The battery BA1 shown in FIG. 1 includes a positive electrode 1 and a negative electrode 2, a separator 3 for separating these electrodes, a positive electrode lead 4, a negative electrode lead 5, and a positive electrode external terminal. 6, a negative electrode can 7 and the like. The positive electrode 1 and the negative electrode 2 are separators 3 in which a non-aqueous electrolyte is injected.
It is housed in a negative electrode can 7 in a spirally wound state via a positive electrode 1 via a positive electrode lead 4 to a positive electrode external terminal 6, and a negative electrode 2 via a negative electrode lead 5 into a negative electrode can 7.
The chemical energy generated inside the battery BA1 can be taken out to the outside as electric energy.
【００２２】（実施例２）表面改質炭素粉末として、ア
セチレンブラック１００重量部に対してポリオキシエチ
レンノニルフェノールエーテルを１重量部吸着させたも
のを使用したこと以外は、実施例１と同様にして電池Ｂ
Ａ２を作製した。Example 2 The same procedure as in Example 1 was carried out except that 1 part by weight of polyoxyethylene nonylphenol ether was adsorbed to 100 parts by weight of acetylene black as the surface-modified carbon powder. Battery B
A2 was produced.
【００２３】（実施例３）表面改質炭素粉末として、ア
セチレンブラック１００重量部に対して高級脂肪酸ペン
タエリスリトールを１重量部吸着させたものを使用した
こと以外は、実施例１と同様にして電池ＢＡ３を作製し
た。Example 3 A battery was prepared in the same manner as in Example 1 except that 1 part by weight of higher fatty acid pentaerythritol was adsorbed to 100 parts by weight of acetylene black as the surface-modified carbon powder. BA3 was produced.
【００２４】（比較例１）正極合剤の作製において界面
活性剤を吸着させずに表面未改質のアセチレンブラック
を用いたこと以外は実施例１と同様にして、比較電池Ｂ
Ｃ１を作製した。Comparative Example 1 Comparative battery B was prepared in the same manner as in Example 1 except that the surface-unmodified acetylene black was used without adsorbing a surfactant in the preparation of the positive electrode mixture.
C1 was produced.
【００２５】図２は、本発明に係る電極を用いた電池Ｂ
Ａ１及び比較電池ＢＣ１の２００ｍＡ（定電流放電）に
おける初期放電特性を、縦軸に電池電圧（Ｖ）を、また
横軸に放電容量（ｍＡｈ）をとって表したグラフであ
り、同図より、本発明に係る電極を用いた電池ＢＡ１は
比較電池ＢＣ１に比し、放電容量が大きいことが分か
る。なお、放電は、２．７５Ｖを放電終止電圧とした。FIG. 2 shows a battery B using the electrode according to the present invention.
It is a graph showing the initial discharge characteristics at 200 mA (constant current discharge) of A1 and comparative battery BC1, the battery voltage (V) on the vertical axis, and the discharge capacity (mAh) on the horizontal axis. It can be seen that the battery BA1 using the electrode according to the present invention has a larger discharge capacity than the comparative battery BC1. In addition, the discharge used 2.75V as the discharge end voltage.
【００２６】図３は、本発明に係る電極を用いた電池Ｂ
Ａ１及び比較電池ＢＣ１の２００ｍＡ（定電流放電）に
おけるサイクル特性を、縦軸に電池の放電容量（ｍＡ
ｈ）を、また横軸にサイクル数（回）をとって表したグ
ラフである。同図より、本発明に係る電極を用いた電池
ＢＡ１は比較電池ＢＣ１に比し、サイクル特性に優れて
いることが分かる。なお、充放電は、２．７５Ｖを放電
終止電圧とし、４．１Ｖを充電終止電圧とした。FIG. 3 shows a battery B using the electrode according to the present invention.
The cycle characteristics of A1 and the comparative battery BC1 at 200 mA (constant current discharge) are plotted on the vertical axis, and the discharge capacity (mA
3 is a graph showing h) and the number of cycles (times) on the horizontal axis. From the figure, it can be seen that the battery BA1 using the electrode according to the present invention is superior in cycle characteristics to the comparative battery BC1. The charge and discharge was set to 2.75V as the discharge end voltage and 4.1V as the charge end voltage.
【００２７】表１に、本発明に係る電極を用いた電池Ｂ
Ａ１〜ＢＡ３及び比較電池ＢＣ１の５００サイクル経過
後の１サイクル当たりのサイクル劣化率（％／サイク
ル）を、まとめて示す。Table 1 shows battery B using the electrode according to the present invention.
The cycle deterioration rates (% / cycle) per cycle after 500 cycles of A1 to BA3 and the comparative battery BC1 are collectively shown.
【００２８】[0028]
【表１】 [Table 1]
【００２９】表１より、本発明に係る電極を用いた電池
ＢＡ１〜ＢＡ３は、比較電池ＢＣ１に比し、いずれもサ
イクル劣化率が低くサイクル特性に優れていることが分
かる。特に、界面活性剤としてポリオキシエチレングリ
コールステアレートを用いた電池ＢＡ１は、特に優れた
サイクル特性を発現することが分かる。It can be seen from Table 1 that the batteries BA1 to BA3 using the electrodes according to the present invention have a lower cycle deterioration rate and excellent cycle characteristics than the comparative battery BC1. In particular, it is found that the battery BA1 using polyoxyethylene glycol stearate as the surfactant exhibits particularly excellent cycle characteristics.
【００３０】（実施例４）ポリオキシエチレングリコー
ルステアレートの吸着量の異なる６種の表面改質アセチ
レンブラックを作製し、実施例１と同様にして、電池Ｂ
Ａ４（ポリオキシエチレングリコールステアレート吸着
部数：０．１）、電池ＢＡ５（同吸着部数：０．５）、
電池ＢＡ６（同吸着部数：２．０）、電池ＢＡ７（同吸
着部数：５．０）、電池ＢＡ８（同吸着部数：１０．
０）、電池ＢＡ９（同吸着部数：２０．０）の６種の電
池を作製した。Example 4 Six types of surface-modified acetylene blacks having different amounts of polyoxyethylene glycol stearate adsorbed were prepared, and battery B was prepared in the same manner as in Example 1.
A4 (number of adsorbed polyoxyethylene glycol stearate: 0.1), battery BA5 (number of adsorbed parts: 0.5),
Battery BA6 (same adsorption number: 2.0), battery BA7 (same adsorption number: 5.0), battery BA8 (same adsorption number: 10.
0) and battery BA9 (the same number of adsorbed parts: 20.0) as six types of batteries.
【００３１】図４は、電池ＢＡ４〜ＢＡ９の各電池の初
期の放電容量（ｍＡｈ）を縦軸に、また界面活性剤の吸
着量（重量部）を横軸にとって表したグラフである。同
グラフ中には、電池ＢＡ１及び比較電池ＢＣ１のデータ
も転記してある。同図より、界面活性剤の吸着量は、初
期の放電容量を大きくするためには、アセチレンブラッ
ク１００重量部に対して１０重量部未満であることが好
ましく、０．５〜６重量部の範囲がより好ましいことが
分かる。なお、他の炭素粉末や界面活性剤を使用した場
合においても同様の結果が得られる。FIG. 4 is a graph in which the initial discharge capacity (mAh) of each of the batteries BA4 to BA9 is plotted on the ordinate and the adsorption amount (parts by weight) of the surfactant is plotted on the abscissa. Data of the battery BA1 and the comparative battery BC1 are also transcribed in the graph. From the figure, the adsorption amount of the surfactant is preferably less than 10 parts by weight with respect to 100 parts by weight of acetylene black in order to increase the initial discharge capacity, and is in the range of 0.5 to 6 parts by weight. Is more preferable. Similar results can be obtained when other carbon powders or surfactants are used.
【００３２】叙上の実施例では本発明を非水系電解液二
次電池の正極に適用する場合の具体例について説明した
が、電解液の水系、非水系、及び、電池の一次、二次は
特に制限されない。In the above embodiments, a specific example in which the present invention is applied to the positive electrode of a non-aqueous electrolyte secondary battery is described. However, the aqueous and non-aqueous electrolytes of the electrolytic solution and the primary and secondary of the battery are There is no particular limitation.
【００３３】[0033]
【発明の効果】本発明に係る電極は、導電剤たる炭素粉
末に界面活性剤を吸着させることにより、活物質の電解
液に対する濡れ性が改良されているので、優れた電池特
性を発現する電池の作製が可能になるなど、本発明は優
れた特有の効果を奏する。EFFECTS OF THE INVENTION The electrode according to the present invention has improved wettability of an active material with an electrolytic solution by adsorbing a surfactant on carbon powder which is a conductive agent, so that the battery exhibits excellent battery characteristics. The present invention has excellent peculiar effects such as the production of
【図１】本発明に係る電極を用いた電池の断面図であ
る。FIG. 1 is a cross-sectional view of a battery using an electrode according to the present invention.
【図２】初期放電特性図である。FIG. 2 is an initial discharge characteristic diagram.
【図３】サイクル特性図である。FIG. 3 is a cycle characteristic diagram.
【図４】界面活性剤吸着量と放電容量との関係を示すグ
ラフである。FIG. 4 is a graph showing a relationship between a surfactant adsorption amount and a discharge capacity.
ＢＡ１ 電池 １ 正極 ２ 負極 ３ セパレータ ４ 正極リード ５ 負極リード ６ 正極外部端子 ７ 負極缶 BA1 battery 1 positive electrode 2 negative electrode 3 separator 4 positive electrode lead 5 negative electrode lead 6 positive electrode external terminal 7 negative electrode can
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中根 育朗 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 (72)発明者 高橋 昌利 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 (72)発明者 渡辺 浩志 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Ikuro Nakane 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (72) Masatoshi Takahashi 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Denki Incorporated (72) Inventor Hiroshi Watanabe 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.
Claims (4)
着剤とからなる正極合剤を集電体に固着させてなる電池
用電極であって、前記炭素粉末として界面活性剤を表面
に吸着させた表面改質炭素粉末が使用されていることを
特徴とする電池用電極。1. A battery electrode comprising a positive electrode mixture comprising an active material, carbon powder as a conductive agent, and a binder, which is fixed to a current collector, wherein a surfactant is used as the carbon powder. An electrode for a battery, wherein a surface-modified carbon powder adsorbed on the surface is used.
００重量部に前記界面活性剤を１０重量部未満の割合で
吸着させてなるものである請求項１記載の電池用電極。2. The surface-modified carbon powder is the carbon powder 1.
The electrode for a battery according to claim 1, wherein the surface active agent is adsorbed to 00 parts by weight at a ratio of less than 10 parts by weight.
Ｏ4 、ＬｉＭｎＯ2 、ＬｉＮｉＯ2 、ＭｎＯ2 及びＣｕ
Ｏよりなる群から選ばれた少なくとも一種の金属酸化物
である請求項１記載の電池用電極。3. The active material is LiCoO 2 , LiMn 2
O 4 , LiMnO 2 , LiNiO 2 , MnO 2 and Cu
The battery electrode according to claim 1, which is at least one metal oxide selected from the group consisting of O.
極を正極とする電池。4. A battery having the battery electrode according to claim 1 as a positive electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3353603A JPH05174810A (en) | 1991-12-18 | 1991-12-18 | Battery electrode and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3353603A JPH05174810A (en) | 1991-12-18 | 1991-12-18 | Battery electrode and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05174810A true JPH05174810A (en) | 1993-07-13 |
Family
ID=18431958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3353603A Pending JPH05174810A (en) | 1991-12-18 | 1991-12-18 | Battery electrode and battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05174810A (en) |
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| JP2001266853A (en) * | 2000-03-22 | 2001-09-28 | Matsushita Electric Ind Co Ltd | Manufacturing method of lithium secondary battery positive electrode paste |
| JP2001313035A (en) * | 2000-04-28 | 2001-11-09 | Nissan Motor Co Ltd | Nonaqeuos cell |
| JP2002093405A (en) * | 2000-09-12 | 2002-03-29 | Hitachi Maxell Ltd | Nonaqueous secondary battery and its charging method |
| JP2002134101A (en) * | 2000-10-20 | 2002-05-10 | Matsushita Electric Ind Co Ltd | Method of producing positive electrode plate for lithium secondary battery |
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-
1991
- 1991-12-18 JP JP3353603A patent/JPH05174810A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001266853A (en) * | 2000-03-22 | 2001-09-28 | Matsushita Electric Ind Co Ltd | Manufacturing method of lithium secondary battery positive electrode paste |
| JP2001313035A (en) * | 2000-04-28 | 2001-11-09 | Nissan Motor Co Ltd | Nonaqeuos cell |
| JP4682395B2 (en) * | 2000-04-28 | 2011-05-11 | 日産自動車株式会社 | Non-aqueous battery |
| JP4553468B2 (en) * | 2000-09-12 | 2010-09-29 | 日立マクセル株式会社 | Non-aqueous secondary battery and charging method thereof |
| JP2002093405A (en) * | 2000-09-12 | 2002-03-29 | Hitachi Maxell Ltd | Nonaqueous secondary battery and its charging method |
| JP2002134101A (en) * | 2000-10-20 | 2002-05-10 | Matsushita Electric Ind Co Ltd | Method of producing positive electrode plate for lithium secondary battery |
| US7923400B2 (en) | 2004-12-14 | 2011-04-12 | Nissan Motor Co., Ltd. | Method of making an electrode for use in a battery |
| JP2006172821A (en) * | 2004-12-14 | 2006-06-29 | Nissan Motor Co Ltd | Electrode and cell using same |
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| JP2006302617A (en) * | 2005-04-19 | 2006-11-02 | Nissan Motor Co Ltd | Manufacturing method of electrode for secondary battery |
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