JPH11329409A - Lithium ion secondary battery - Google Patents
Lithium ion secondary batteryInfo
- Publication number
- JPH11329409A JPH11329409A JP10133070A JP13307098A JPH11329409A JP H11329409 A JPH11329409 A JP H11329409A JP 10133070 A JP10133070 A JP 10133070A JP 13307098 A JP13307098 A JP 13307098A JP H11329409 A JPH11329409 A JP H11329409A
- Authority
- JP
- Japan
- Prior art keywords
- active material
- lithium ion
- ion secondary
- secondary battery
- carbon
- 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.)
- Pending
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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はリチウムイオン二次
電池に関する。The present invention relates to a lithium ion secondary battery.
【０００２】[0002]
【従来の技術とその問題点】正負電極と、リチウムイオ
ンと可逆的に電気化学反応を行う活物質と、リチウムイ
オンの移動を受け持つ非水電解液とを有し、充放電が可
能なリチウムイオン二次電池が知られている。また、走
行駆動源としてエンジンとモーターを備え、それらの両
方またはいずれか一方の駆動力により走行するハイブリ
ッド車両が知られている。このハイブリッド車両の一部
には、上述したリチウムイオン二次電池を搭載したもの
もある。2. Description of the Related Art Lithium ions capable of being charged and discharged having a positive / negative electrode, an active material which reversibly electrochemically reacts with lithium ions, and a non-aqueous electrolyte solution for transferring lithium ions. Secondary batteries are known. There is also known a hybrid vehicle that includes an engine and a motor as traveling driving sources, and travels using both or any one of the driving forces. Some hybrid vehicles are equipped with the above-described lithium ion secondary battery.
【０００３】ところで、ハイブリッド車両は、基本的
に、低速、軽負荷の領域ではエンジンよりも運転効率が
高いモーターで走行し、高速、高負荷の領域ではモータ
ーよりも運転効率が高いエンジンで走行する。したがっ
て、モーターは主として車両の発進、加速時や減速時に
用いられ、そのモーターに電力を供給する電池には、小
電力を長時間にわたって供給する高エネルギー密度より
も、短時間に大電力を供給する高出力密度であることが
要求される。[0003] By the way, a hybrid vehicle basically travels with a motor whose operating efficiency is higher than that of an engine in a low speed and light load range, and runs with an engine whose operating efficiency is higher than that of a motor in a high speed and high load range. . Therefore, the motor is mainly used when starting, accelerating and decelerating the vehicle, and the battery that supplies power to the motor supplies large power in a short time rather than the high energy density that supplies small power for a long time. High power density is required.
【０００４】しかし、従来のリチウムイオン電池は、主
にエネルギー密度の向上を目標に研究開発が進められ、
その体積および重量当たりのエネルギー密度は高い水準
に達しているが、出力密度は上述したハイブリッド車両
の要求を満たすものではない。[0004] However, conventional lithium ion batteries have been researched and developed mainly for the purpose of improving energy density.
Although their energy density per volume and weight has reached a high level, their power density does not meet the requirements of the hybrid vehicles mentioned above.
【０００５】本発明の目的は、高出力密度のリチウムイ
オン二次電池を提供することにある。An object of the present invention is to provide a lithium ion secondary battery having a high output density.
【０００６】[0006]
【課題を解決するための手段】（１） 請求項１の発明
は、リチウムイオンと電気化学反応を行う活物質と集電
体より構成される正、負電極と、リチウムイオンを移動
させるための電解液とを有するリチウムイオン二次電池
に適用され、活物質の塗布厚さを５〜８０μｍとするこ
とにより、上記目的を達成できる。 （２） 請求項２のリチウムイオン二次電池は、活物質
の塗布厚さを８〜６０μｍとしたものである。 （３） 請求項３のリチウムイオン二次電池は、活物質
の粒径を５μｍ以下としたものである。According to a first aspect of the present invention, there is provided a positive electrode and a negative electrode each including an active material that performs an electrochemical reaction with lithium ions and a current collector; The above object can be achieved by applying the present invention to a lithium ion secondary battery having an electrolytic solution and setting the applied thickness of the active material to 5 to 80 μm. (2) In the lithium ion secondary battery of the second aspect, the active material is applied in a thickness of 8 to 60 μm. (3) In the lithium ion secondary battery according to claim 3, the particle diameter of the active material is set to 5 μm or less.
【０００７】[0007]
【発明の効果】本発明によれば、活物質の塗布厚さを５
〜８０μｍとしたので、従来の塗布厚さ１００μｍの電
池のおよそ２倍の出力密度が得られる。さらに好ましく
は８〜６０μｍとすることにより、従来の塗布厚さ１０
０μｍの電池のおよそ３倍の出力密度が得られる。ま
た、活物質の粒径を５μｍ以下としたので、従来の粒径
２０μｍの電池のおよそ２倍の出力密度が得られる。い
ずれもハイブリッド車両に対して最適な高出力密度の電
池を提供できる。According to the present invention, the coating thickness of the active material is 5
Since the thickness is set to ８０80 μm, an output density approximately twice that of a conventional battery having a coating thickness of 100 μm can be obtained. More preferably, the thickness is set to 8 to 60 μm so that the conventional coating thickness 10
About three times the power density of a 0 μm battery is obtained. Further, since the particle diameter of the active material is set to 5 μm or less, an output density approximately twice as high as that of a conventional battery having a particle diameter of 20 μm can be obtained. In any case, it is possible to provide a battery with a high power density that is optimal for a hybrid vehicle.
【０００８】[0008]
【発明の実施の形態】図１は一実施の形態のリチウムイ
オン二次電池の構造を示す。一実施の形態のリチウムイ
オン二次電池は、フィルム状の正極材とセパレーターと
負極材とを円筒状に巻き付けたものであり、図１（ａ）
にその断面を、図１（ｂ）に断面の一部の詳細を示す。
正極材はアルミニウムの正極集電体の表裏に正極活物質
を塗布して形成され、負極材は銅の負極集電体の表裏に
負極活物質を塗布して形成される。FIG. 1 shows a structure of a lithium ion secondary battery according to one embodiment. The lithium ion secondary battery according to one embodiment is obtained by winding a film-shaped positive electrode material, a separator, and a negative electrode material into a cylindrical shape, and FIG.
FIG. 1B shows a detail of a part of the section.
The positive electrode material is formed by applying a positive electrode active material on the front and back of an aluminum positive electrode current collector, and the negative electrode material is formed by applying a negative electrode active material on the front and back of a copper negative electrode current collector.
【０００９】ここで、正極活物質には、LiCoO2、LiNiO
2、LiMn2O4、LixFeOy，LixVyOzに代表される金属酸化物
およびこれらの元素の一部を他の元素で置換した複合酸
化物、例えば、金属元素を置換したLixCoyMzO2（M＝M
n，Ni，Ｖなど）やLixMnyMzO4(M＝Li，Ni，Cr，Fe，Co
など）、あるいは酸素を置換したLixMn2O4-aFb、LixCoy
NizOwFaなどを用いることができる。また、負極活物質
には、黒鉛、メゾフェーズカーボン系炭素、難黒鉛性炭
素（ハードカーボン）、低温焼成炭素などの炭素材料
や、SnBxPyOz、Nb2O5、LiTixOyなどや、LiFexNy、LiMnx
Nyなどの金属酸化物、窒化物系の材料を用いることがで
きる。Here, the positive electrode active material is LiCoO2, LiNiO
2. Metal oxides represented by LiMn2O4, LixFeOy, LixVyOz and composite oxides in which some of these elements are replaced by other elements, for example, LixCoyMzO2 (M = M
n, Ni, V, etc.) and LixMnyMzO4 (M = Li, Ni, Cr, Fe, Co
LixMn2O4-aFb, LixCoy substituted with oxygen
NizOwFa or the like can be used. In addition, carbon materials such as graphite, mesophase carbon-based carbon, non-graphitizable carbon (hard carbon), low-temperature calcined carbon, SnBxPyOz, Nb2O5, LiTixOy, LiFexNy, LiMnx
A metal oxide such as Ny or a nitride-based material can be used.
【００１０】上述したように、従来のリチウムイオン二
次電池は、エネルギー密度を向上させるために、活物質
の塗布厚さを１００μｍ程度まで厚くするとともに、２
０μｍ程度の粒径の大きな活物質を用いている。その結
果、内部抵抗が高くなり、高出力が出せないものとなっ
ている。As described above, in the conventional lithium ion secondary battery, in order to improve the energy density, the thickness of the active material applied is increased to about 100 μm,
An active material having a large particle size of about 0 μm is used. As a result, the internal resistance is increased and high output cannot be obtained.
【００１１】ハイブリッド車両では、短時間に大電流の
充放電が可能な高出力密度が要求されるが、短時間に大
電流の充放電は活物質の表面近傍の電池反応でまかなう
必要がある。つまり、従来の高エネルギー密度を目標と
した塗布厚さ１００μｍの活物質の内部は、短時間の大
電流の充放電には寄与しないことになる。In a hybrid vehicle, a high output density capable of charging / discharging a large current in a short time is required, but charging / discharging a large current in a short time needs to be covered by a battery reaction near the surface of the active material. That is, the inside of the conventional active material having a coating thickness of 100 μm which aims at a high energy density does not contribute to short-time charging and discharging of a large current.
【００１２】図２は、１μｍの粒径の活物質を用いて塗
布厚さを変えた場合の出力密度の実験データであり、従
来の塗布厚さ１００μｍの出力密度に対する相対出力密
度で示す。図から明らかなように、活物質の塗布厚さを
５〜８０μｍとすると、１００μｍの従来の電池のおよ
そ２倍の出力密度が得られる。さらに、活物質の塗布厚
さを８〜６０μｍとすると、１００μｍの従来の電池の
およそ３倍の出力密度が得られる。つまり、活物質の塗
布厚さを、従来の１００μｍから５〜８０μｍに、さら
に好ましくは８〜６０μｍにすることによって、高出力
密度に特化した電池とすることができる。FIG. 2 shows experimental data of the output density when the coating thickness is changed using an active material having a particle diameter of 1 μm, and is shown as a relative output density with respect to the conventional output density of 100 μm. As is clear from the figure, when the thickness of the active material applied is 5 to 80 μm, an output density approximately twice that of a conventional battery of 100 μm can be obtained. Furthermore, if the applied thickness of the active material is 8 to 60 μm, an output density approximately three times that of a conventional battery of 100 μm can be obtained. That is, by setting the applied thickness of the active material from the conventional 100 μm to 5 to 80 μm, and more preferably 8 to 60 μm, a battery specialized in high output density can be obtained.
【００１３】図３は、活物質の粒径を変えた場合の出力
密度の実験データであり、従来の粒径２０μｍの出力密
度に対する相対出力密度を示す。活物質の粒径はその最
大のものが塗布厚さ以下であればよい。しかし、活物質
個体内の拡散が遅いため、高出力密度にするには５μｍ
以下にするのが好ましい。活物質の粒径を従来の２０μ
ｍから５μｍにすることによって、従来の電池のおよそ
２倍の出力密度が得られる。FIG. 3 shows experimental data of the output density when the particle size of the active material is changed, and shows the relative output density with respect to the conventional output density with a particle size of 20 μm. The particle size of the active material may be such that the largest one is equal to or less than the coating thickness. However, since diffusion in the active material individual is slow, 5 μm
It is preferable to set the following. The particle size of the active material is
By setting m to 5 μm, an output density approximately twice that of a conventional battery can be obtained.
【００１４】このように、活物質の塗布厚さを５〜８０
μｍとすることによって、従来の塗布厚さ１００μｍの
電池のおよそ２倍の出力密度が得られる。さらに、好ま
しくは８〜６０μｍとすることによって、従来の塗布厚
さ１００μｍの電池のおよそ３倍の出力密度が得られ
る。また、活物質の粒径を５μｍ以下にすることによっ
て、従来の粒径２０μｍの電池のおよそ２倍の出力密度
が得られる。いずれも特にハイブリッド車両に対して最
適な電池を提供することができる。As described above, the coating thickness of the active material is 5 to 80.
By setting the thickness to μm, an output density approximately twice that of a conventional battery having a coating thickness of 100 μm can be obtained. Further, by preferably setting the thickness to 8 to 60 μm, an output density approximately three times that of a conventional battery having a coating thickness of 100 μm can be obtained. Further, by setting the particle size of the active material to 5 μm or less, it is possible to obtain approximately twice the output density of a conventional battery having a particle size of 20 μm. In any case, an optimal battery can be provided particularly for a hybrid vehicle.
【００１５】なお、電池の構造と材質は上述した一実施
の形態の構造と材質に限定されない。The structure and material of the battery are not limited to the structure and material of the above-described embodiment.
【図１】 発明の一実施の形態の構造を示す図である。FIG. 1 is a diagram showing a structure of an embodiment of the present invention.
【図２】 活物質の塗布厚さに対する出力密度の実験デ
ータを示す図である。FIG. 2 is a view showing experimental data of an output density with respect to a coating thickness of an active material.
【図３】 活物質の粒径に対する出力密度の実験データ
を示す図である。FIG. 3 is a diagram showing experimental data of output density with respect to the particle diameter of an active material.
フロントページの続き (72)発明者 丹上 雄児 神奈川県横浜市神奈川区宝町２番地 日産 自動 車株式会社内 (72)発明者 安部 孝昭 神奈川県横浜市神奈川区宝町２番地 日産 自動 車株式会社内 (72)発明者 岩井 健 神奈川県横浜市神奈川区宝町２番地 日産 自動 車株式会社内Continuing on the front page (72) Inventor Yuji Tangami 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Nissan Motor Co., Ltd. (72) Inventor Takaaki Abe 2 Takaracho, Kanagawa-ku, Yokohama City, Kanagawa Nissan Motor Co., Ltd. 72) Inventor Ken Iwai Nissan Motor Co., Ltd., 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa
Claims (3)
物質と集電体より構成される正、負電極と、リチウムイ
オンを移動させるための電解液とを有するリチウムイオ
ン二次電池において、 前記活物質の塗布厚さを５〜８０μｍとすることを特徴
とするリチウムイオン二次電池。1. A lithium ion secondary battery having positive and negative electrodes composed of an active material that performs an electrochemical reaction with lithium ions and a current collector, and an electrolyte solution for moving lithium ions. A lithium ion secondary battery characterized in that the applied thickness of the substance is 5 to 80 μm.
いて、 前記活物質の塗布厚さを８〜６０μｍとすることを特徴
とするリチウムイオン二次電池。2. The lithium ion secondary battery according to claim 1, wherein the applied thickness of the active material is 8 to 60 μm.
ムイオン二次電池において、 前記活物質の粒径を５μｍ以下とすることを特徴とする
リチウムイオン二次電池。3. The lithium ion secondary battery according to claim 1, wherein the active material has a particle size of 5 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10133070A JPH11329409A (en) | 1998-05-15 | 1998-05-15 | Lithium ion secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10133070A JPH11329409A (en) | 1998-05-15 | 1998-05-15 | Lithium ion secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11329409A true JPH11329409A (en) | 1999-11-30 |
Family
ID=15096149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10133070A Pending JPH11329409A (en) | 1998-05-15 | 1998-05-15 | Lithium ion secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11329409A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1184918A2 (en) * | 2000-08-28 | 2002-03-06 | Nissan Motor Co., Ltd. | Rechargeable lithium ion battery |
| JP2002100354A (en) * | 2000-09-21 | 2002-04-05 | Toshiba Battery Co Ltd | Non aqueous electrolyte secondary battery |
| JP2002151055A (en) * | 2000-08-28 | 2002-05-24 | Nissan Motor Co Ltd | Lithium ion secondary battery |
| JP2002151157A (en) * | 2000-11-13 | 2002-05-24 | Japan Storage Battery Co Ltd | Nonaqueous electrolyte secondary battery |
| US6423453B1 (en) * | 1998-08-20 | 2002-07-23 | Sony Corporation | Solid electrolyte battery |
| JP2003249211A (en) * | 2002-02-26 | 2003-09-05 | Nec Corp | Negative electrode for secondary battery, manufacturing method of secondary battery and negative electrode for secondary battery |
| WO2005013408A1 (en) | 2003-07-31 | 2005-02-10 | Nec Lamilion Energy, Ltd. | Lithium ion secondary cell |
| JP2006216395A (en) * | 2005-02-04 | 2006-08-17 | Tdk Corp | Lithium ion battery pack |
| JP2006260786A (en) * | 2005-03-15 | 2006-09-28 | Hitachi Maxell Ltd | Nonaqueous electrolyte secondary battery |
| JP2006277990A (en) * | 2005-03-28 | 2006-10-12 | Hitachi Maxell Ltd | Nonaqueous electrolyte secondary battery |
| JP2007184219A (en) * | 2005-12-29 | 2007-07-19 | Ind Technol Res Inst | Lithium-ion secondary battery of high output design |
| JP2007214086A (en) * | 2006-02-13 | 2007-08-23 | Sony Corp | Electrode for battery, and battery using it |
| JP2016131123A (en) * | 2015-01-14 | 2016-07-21 | 株式会社日立製作所 | Lithium secondary battery, power storage device including lithium secondary battery, and method for manufacturing lithium secondary battery |
| CN106784855A (en) * | 2016-12-02 | 2017-05-31 | 西安瑟福能源科技有限公司 | A kind of unmanned plane manufacture method of high temperature modification lithium ion battery |
| CN106784997A (en) * | 2017-01-19 | 2017-05-31 | 西安瑟福能源科技有限公司 | A kind of emergency starting ultra-high magnification lithium ion battery |
| CN113113571A (en) * | 2014-01-03 | 2021-07-13 | 溧阳天目先导电池材料科技有限公司 | Method for preliminary alkali metallization and application of method in battery material |
-
1998
- 1998-05-15 JP JP10133070A patent/JPH11329409A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6423453B1 (en) * | 1998-08-20 | 2002-07-23 | Sony Corporation | Solid electrolyte battery |
| EP1184918A3 (en) * | 2000-08-28 | 2007-04-04 | Nissan Motor Co., Ltd. | Rechargeable lithium ion battery |
| JP2002151055A (en) * | 2000-08-28 | 2002-05-24 | Nissan Motor Co Ltd | Lithium ion secondary battery |
| EP1184918A2 (en) * | 2000-08-28 | 2002-03-06 | Nissan Motor Co., Ltd. | Rechargeable lithium ion battery |
| JP4626105B2 (en) * | 2000-08-28 | 2011-02-02 | 日産自動車株式会社 | Lithium ion secondary battery |
| US7138208B2 (en) | 2000-08-28 | 2006-11-21 | Nissan Motor Co., Ltd. | Rechargeable lithium ion battery |
| JP2002100354A (en) * | 2000-09-21 | 2002-04-05 | Toshiba Battery Co Ltd | Non aqueous electrolyte secondary battery |
| JP2002151157A (en) * | 2000-11-13 | 2002-05-24 | Japan Storage Battery Co Ltd | Nonaqueous electrolyte secondary battery |
| JP2003249211A (en) * | 2002-02-26 | 2003-09-05 | Nec Corp | Negative electrode for secondary battery, manufacturing method of secondary battery and negative electrode for secondary battery |
| WO2005013408A1 (en) | 2003-07-31 | 2005-02-10 | Nec Lamilion Energy, Ltd. | Lithium ion secondary cell |
| JP2006216395A (en) * | 2005-02-04 | 2006-08-17 | Tdk Corp | Lithium ion battery pack |
| JP2006260786A (en) * | 2005-03-15 | 2006-09-28 | Hitachi Maxell Ltd | Nonaqueous electrolyte secondary battery |
| JP2006277990A (en) * | 2005-03-28 | 2006-10-12 | Hitachi Maxell Ltd | Nonaqueous electrolyte secondary battery |
| JP2007184219A (en) * | 2005-12-29 | 2007-07-19 | Ind Technol Res Inst | Lithium-ion secondary battery of high output design |
| JP2007214086A (en) * | 2006-02-13 | 2007-08-23 | Sony Corp | Electrode for battery, and battery using it |
| CN113113571A (en) * | 2014-01-03 | 2021-07-13 | 溧阳天目先导电池材料科技有限公司 | Method for preliminary alkali metallization and application of method in battery material |
| JP2016131123A (en) * | 2015-01-14 | 2016-07-21 | 株式会社日立製作所 | Lithium secondary battery, power storage device including lithium secondary battery, and method for manufacturing lithium secondary battery |
| CN106784855A (en) * | 2016-12-02 | 2017-05-31 | 西安瑟福能源科技有限公司 | A kind of unmanned plane manufacture method of high temperature modification lithium ion battery |
| CN106784997A (en) * | 2017-01-19 | 2017-05-31 | 西安瑟福能源科技有限公司 | A kind of emergency starting ultra-high magnification lithium ion battery |
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