JP5435316B2 - 水分散型バインダー、導電材、およびフルオロエチレンカーボネートを含むリチウム二次電池 - Google Patents
水分散型バインダー、導電材、およびフルオロエチレンカーボネートを含むリチウム二次電池 Download PDFInfo
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- JP5435316B2 JP5435316B2 JP2012517417A JP2012517417A JP5435316B2 JP 5435316 B2 JP5435316 B2 JP 5435316B2 JP 2012517417 A JP2012517417 A JP 2012517417A JP 2012517417 A JP2012517417 A JP 2012517417A JP 5435316 B2 JP5435316 B2 JP 5435316B2
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- negative electrode
- water
- secondary battery
- conductive material
- lithium secondary
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Images
Classifications
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- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
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Description
上記負極は、水分散型バインダーおよび導電材を含み、
上記非水電解液は、フルオロエチレンカーボネート(FEC)を含むことを特徴とするリチウム二次電池を提供する。
正極、負極、および非水電解液を含むリチウム二次電池において、
上記負極は、水分散型バインダーおよび導電材を含み、
上記非水電解液は、フルオロエチレンカーボネート(FEC)を含むことを特徴とする。
これにより、本発明では、上記負極に水分散型バインダーと共に導電材を含む。
(負極の製造)
グラファイトとバインダーとを混合した組成物に導電性カーボンを入れ、これを水に分散させてスラリーを製造した後(グラファイト:バインダー(SBR):導電性カーボン(Super-P) = 98.6:1:0.4の重量比)、このスラリーを銅ホイールにコーティングし、130℃で十分に乾燥させ、プレスして負極を製造した。負極は厚さが約135μmであった。
LiCoO2:カーボンブラック:PVdF = 95:2.5:2.5の重量比でNMPに分散させてスラリーを製造した後、このスラリーをアルミホイルにコーティングし、130℃で十分に乾燥させ、プレスして正極を製造した。正極は厚さが約140μmであった。
上記正極と負極との間にポリプロピレンセパレータを積層し、これを電池ケースに収納した後、エチレンカーボネート(EC):フルオロエチレンカーボネート(FEC) = 90:10の重量比の電解液を注入し、電池ケースをシールして最終的に電池を作製した。
(負極および正極の製造)
上記実施例1と同一である。
上記正極と負極との間にポリプロピレンセパレータを積層し、これを電池ケースに収納した後、エチレンカーボネート(EC):フルオロエチレンカーボネート(FEC) = 85:15の重量比の電解液を注入し、電池ケースをシールして最終的に電池を作製した。
(負極の製造)
グラファイトとバインダーとを混合した組成物に導電性カーボンを入れ、これを水に分散させてスラリーを製造した後(グラファイト:バインダー(SBR):導電性カーボン(Super-P) = 95.6:4:0.4の重量比)、このスラリーを銅ホイールにコーティングし、130℃で十分に乾燥させ、プレスして負極を製造した。負極は厚さが約135μmであった。
上記実施例1と同一である。
(負極および正極の製造)
上記実施例3と同一である。
上記正極と負極との間にポリプロピレンセパレータを積層し、これを電池ケースに収納した後、エチレンカーボネート(EC):フルオロエチレンカーボネート(FEC) = 85:15の重量比の電解液を注入し、電池ケースをシールして最終的に電池を作製した。
(負極の製造)
グラファイト:バインダー(SBR) = 97:3.0の重量比で水に分散させてスラリーを製造した後、このスラリーを銅ホイールにコーティングし、130℃で十分に乾燥させ、プレスして負極を製造した。負極は厚さが約135μmであった。
LiCoO2:カーボンブラック:PVdF = 95:2.5:2.5の重量比でNMPに分散させてスラリーを製造した後、このスラリーをアルミホイルにコーティングし、130℃で十分に乾燥させ、プレスして正極を製造した。正極は厚さが約140μmであった。
上記正極と負極との間にポリプロピレンセパレータを積層し、これを電池ケースに収納した後、エチレンカーボネート(EC)電解液を注入し、電池ケースをシールして最終的に電池を作製した。
(負極の製造)
グラファイト:バインダー(SBR):導電性カーボン(Super-P) = 98.6:1:0.4の重量比で水に分散させてスラリーを製造した後、このスラリーを銅ホイールにコーティングし、130℃で十分に乾燥させ、プレスして負極を製造した。負極は厚さが約135μmであった。
上記比較例1と同一である。
上記正極と負極との間にポリプロピレンセパレータを積層し、これを電池ケースに収納した後、エチレンカーボネート(EC):フルオロエチレンカーボネート(FEC) = 80:20の重量比の電解液を注入し、電池ケースをシールして最終的に電池を作製した。
(負極の製造)
グラファイト:バインダー(SBR):導電性カーボン(Super-P) = 99.6:0:0.4の重量比で水に分散させてスラリーを製造した後、このスラリーを銅ホイールにコーティングし、130℃で十分に乾燥させ、プレスして負極を製造した。負極は厚さが約135μmであった。
上記比較例1と同一である。
上記正極と負極との間にポリプロピレンセパレータを積層し、これを電池ケースに収納した後、エチレンカーボネート(EC):フルオロエチレンカーボネート(FEC) = 90:10の重量比の電解液を注入し、電池ケースをシールして最終的に電池を作製した。
(負極の製造)
グラファイト:バインダー(SBR):導電性カーボン(Super-P) = 92.6:7:0.4の重量比で水に分散させてスラリーを製造した後、このスラリーを銅ホイールにコーティングし、130℃で十分に乾燥させ、プレスして負極を製造した。負極は厚さが約135μmであった。
上記比較例3と同一である。
* 充放電実験条件
- charge:(CC/CV mode)、1.3C / 4.2V、end current 50mA
- discharge:(CC mode)、1.0C / 3.0V cut-off
Claims (4)
- 正極、負極、および非水電解液を含むリチウム二次電池において、
上記負極は、水分散型バインダおよび導電材を含み、
上記非水電解液は、フルオロエチレンカーボネート(FEC)と、エチレンカーボネート(EC)とを含み、
上記水分散型バインダは、
スチレン−ブタジエンゴム、アクリロニトリル−ブタジエンゴム、アクリロニトリル−ブタジエン−スチレンゴム、カルボキシメチルセルロース、およびヒドロキシプロピルメチルセルロースから選ばれる1種もしくは2種以上組み合わせであって、
上記負極に対して1〜4重量%の含量で含まれ、
上記フルオロエチレンカーボネートは、上記非水電解液に対して10〜15重量%の含量で含まれ、
上記エチレンカーボネートは、上記非水電解液に対して85〜90重量%の含量で含まれることを特徴とする、
リチウム二次電池。 - 上記導電材は、アセチレンブラック、カーボンブラック、黒鉛から選ばれる1種もしくは2種以上組み合わせて用いることを特徴とする、
請求項1に記載のリチウム二次電池。 - 上記導電材は0.2〜0.8重量%含まれることを特徴とする、
請求項1又は請求項2に記載のリチウム二次電池。 - 前記負極は、負極活性物質、前記水分散型バインダ、前記導電材及び水分散型溶媒を含む混合物を集電体に塗布した後、乾燥させて得られる、
請求項1から請求項3までの何れか一項に記載のリチウム二次電池。
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US10211460B2 (en) * | 2012-04-03 | 2019-02-19 | Gs Yuasa International Ltd. | Positive electrode for battery, and battery |
US10096810B2 (en) * | 2012-05-10 | 2018-10-09 | Samsung Sdi Co., Ltd. | Separator and method of manufacturing the same and rechargeable lithium battery including the same |
US9806335B2 (en) | 2012-11-30 | 2017-10-31 | Lg Chem, Ltd. | Composite including conductive material and binder on surface of (semi) metal oxide and method of preparing anode slurry including the same |
KR101622808B1 (ko) * | 2012-11-30 | 2016-05-19 | 주식회사 엘지화학 | 복합체 및 이를 포함하는 음극 슬러리의 제조방법 |
US9590238B2 (en) | 2012-11-30 | 2017-03-07 | Lg Chem, Ltd. | Composite for anode active material and method of preparing the same |
JP6256768B2 (ja) * | 2013-01-09 | 2018-01-10 | パナソニックIpマネジメント株式会社 | 二次電池用非水電解液およびリチウム二次電池 |
US9225023B2 (en) | 2013-10-04 | 2015-12-29 | Toyota Motor Engineering & Manufacturing North America, Inc. | Fullerenes as high capacity cathode materials for a rechargeable magnesium battery |
WO2018043369A1 (ja) * | 2016-08-29 | 2018-03-08 | 株式会社Gsユアサ | 非水電解質蓄電素子 |
CN110165212A (zh) * | 2018-01-26 | 2019-08-23 | 山东星火科学技术研究院 | 一种石墨烯电池导电剂 |
JP7112872B2 (ja) * | 2018-03-30 | 2022-08-04 | 三洋電機株式会社 | 二次電池 |
JP7143114B2 (ja) * | 2018-05-11 | 2022-09-28 | 株式会社Eneosマテリアル | 蓄電デバイス用組成物、蓄電デバイス電極用スラリー、蓄電デバイス電極及び蓄電デバイス |
WO2022071317A1 (ja) * | 2020-10-02 | 2022-04-07 | 株式会社村田製作所 | 非水電解質二次電池 |
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