JP2007005293A - 電解質および電池 - Google Patents
電解質および電池 Download PDFInfo
- Publication number
- JP2007005293A JP2007005293A JP2006146780A JP2006146780A JP2007005293A JP 2007005293 A JP2007005293 A JP 2007005293A JP 2006146780 A JP2006146780 A JP 2006146780A JP 2006146780 A JP2006146780 A JP 2006146780A JP 2007005293 A JP2007005293 A JP 2007005293A
- Authority
- JP
- Japan
- Prior art keywords
- sultone
- electrolyte
- negative electrode
- positive electrode
- examples
- 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.)
- Granted
Links
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- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 13
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- 150000002019 disulfides Chemical class 0.000 description 1
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- PCJHRQJSBBKOPE-UHFFFAOYSA-N ethene;trifluoromethyl hydrogen carbonate Chemical group C=C.OC(=O)OC(F)(F)F PCJHRQJSBBKOPE-UHFFFAOYSA-N 0.000 description 1
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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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- 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
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Abstract
【解決手段】正極21と負極22とがセパレータ23および電解質24を介して対向配置されている。電解質24は、プロペンスルトン、1, 3−ブタンスルトン、トルエンスルトンあるいは1,8−ナフトスルトンなどのスルトンを含有する電解液と、高分子化合物とを含んでいる。これにより、電極の表面に良好な被膜が形成され、イオン伝導性が向上すると共に、高温環境下であっても充放電効率が改善される。
【選択図】図2
Description
図1は、本発明における第1の実施の形態としての二次電池を分解して表すものである。この二次電池は、いわゆるラミネートフィルム型といわれるものであり、正極リード11および負極リード12が取り付けられた巻回電極体20をフィルム状の外装部材30の内部に収容したものである。
本実施例では、上記第1の実施の形態に対応した二次電池を作製した。まず、正極活物質としてリチウム・コバルト複合酸化物(LiCoO2 )94質量部と、導電剤としてグラファイト3質量部と、結着剤としてポリフッ化ビニリデン3質量部とを混合したのち、溶剤としてN−メチル−2−ピロリドンを添加し正極合剤スラリーを得た。次いで、得られた正極合剤スラリーを、厚み20μmのアルミニウム箔よりなる正極集電体21Aの両面に均一に塗布し乾燥させて正極活物質層21Bを形成した。正極活物質層21Bの面積密度は片面当たり40mg/cm2 とした。そののち、正極活物質層21Bが形成された正極集電体21Aを幅50mm,長さ300mmの形状に切断して正極21を作製した。
電解質用組成物として、電解液100質量部に対して重合性化合物であるアクリル酸エステル溶液を5質量部の割合で混合したものを用いたことを除き、他は実施例1−1〜1−8と同様にして二次電池を作製した。その際、外装部材30の開放辺を熱融着により貼り合わせたのち、ガラス板に挟んで加熱し、重合性化合物を重合させることによりゲル状の電解質24を形成した。また、アクリル酸エステルは、化8に示したトリメチロールプロパントリアクリレートと、化9に示したネオペンチルグリコールジアクリレートとを、トリメチロールプロパントリアクリレート:ネオペンチルグリコールジアクリレート=3:7の質量比で混合したものを用いた。電解液は実施例1−1〜1−8と同様のものとした。
電解液を高分子化合物であるヘキサフルオロプロピレンとフッ化ビニリデンとの共重合体に保持させ、ゲル状の電解質24を作製したことを除き、他は実施例1−1〜1−8と同様にして二次電池を作製した。具体的には、次のようにして作製した。
本実施例では、上記第2の実施の形態に対応した二次電池を作製した。具体的には、セパレータ23を以下のようにして作製した点を除き、他は実施例3−1〜3−8とほぼ同様の手順である。
実施例5−1については実施例4−1〜4−8と同様にして作製し、実施例5−2については実施例4−9と同様にして作製した。但し、どちらも化4(4)に示したプロペンスルトンを添加剤として用いた。添加剤の含有量は0.5質量%とした。
Claims (13)
- スルトンを含む電解液と高分子化合物とを含有することを特徴とする電解質。
- 前記電解液における前記スルトンの含有量は、0.05質量%以上1質量%以下の範囲内であることを特徴とする請求項1記載の電解質。
- 前記スルトンは、酸素原子に第2級炭素原子または第3級炭素原子が結合した化合物、および炭素原子間の多重結合を有する化合物からなる群のうちの少なくとも1種を含むことを特徴とする請求項1記載の電解質。
- 前記スルトンは、1,3−ブタンスルトン,プロペンスルトン,トルエンスルトンおよび1,8−ナフトスルトンからなる群のうちの少なくとも1種を含むことを特徴とする請求項1記載の電解質。
- 前記電解液は、低粘度溶媒を含むことを特徴とする請求項1記載の電解質。
- 正極および負極と共に電解質を備えた電池であって、
前記電解質は、スルトンを含む電解液と高分子化合物とを含有する
ことを特徴とする電池。 - 前記電解液における前記スルトンの含有量は、0.05質量%以上1質量%以下の範囲内であることを特徴とする請求項6記載の電池。
- 前記スルトンは、酸素原子に第2級炭素原子または第3級炭素原子が結合した化合物、および炭素原子間の多重結合を有する化合物からなる群のうちの少なくとも1種を含むことを特徴とする請求項6記載の電池。
- 前記スルトンは、1,3−ブタンスルトン,プロペンスルトン,トルエンスルトンおよび1,8−ナフトスルトンからなる群のうちの少なくとも1種を含むことを特徴とする請求項6記載の電池。
- 前記正極,負極および電解質をフィルム状の外装部材に収納したことを特徴とする請求項6記載の電池。
- 前記正極と前記負極との間にセパレータを備え、
前記セパレータは、電気絶縁性を有する多孔質膜からなる基材層と、この基材層の少なくとも一方の面に設けられたフッ化ビニリデンを含む高分子化合物層とを有する
ことを特徴とする請求項6記載の電池。 - 前記高分子化合物層は、フッ化ビニリデンとヘキサフルオロプロピレンとの共重合体を含むことを特徴とする請求項11記載の電池。
- 前記電解液は、低粘度溶媒を含むことを特徴とする請求項11記載の電池。
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008015987A1 (en) * | 2006-08-04 | 2008-02-07 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte battery, battery pack and vehicle |
JP2008204923A (ja) * | 2007-02-22 | 2008-09-04 | Sanyo Electric Co Ltd | 非水電解質及び該非水電解質を含む非水電解質二次電池 |
WO2009057232A1 (ja) * | 2007-11-02 | 2009-05-07 | Panasonic Corporation | 非水電解質二次電池 |
JP2010080229A (ja) * | 2008-09-25 | 2010-04-08 | Sony Corp | 電極及び電池 |
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CN112271330A (zh) * | 2020-10-21 | 2021-01-26 | 广州天赐高新材料股份有限公司 | 电解液添加剂、电解液及储能装置 |
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