JP7342273B2 - Li二次電池用の電解質 - Google Patents
Li二次電池用の電解質 Download PDFInfo
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- JP7342273B2 JP7342273B2 JP2022537745A JP2022537745A JP7342273B2 JP 7342273 B2 JP7342273 B2 JP 7342273B2 JP 2022537745 A JP2022537745 A JP 2022537745A JP 2022537745 A JP2022537745 A JP 2022537745A JP 7342273 B2 JP7342273 B2 JP 7342273B2
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- H—ELECTRICITY
- 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
- H01M10/0569—Liquid materials characterised by the solvents
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- H—ELECTRICITY
- 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
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- 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
- H01M10/0567—Liquid materials characterised by the additives
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- H—ELECTRICITY
- 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
- H01M10/0568—Liquid materials characterised by the solutes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
- H01M2300/0034—Fluorinated solvents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
- H01M2300/0037—Mixture of solvents
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Description
試験したセルは、コインセルの型CR2025であった。正のケーシング、正極(電解質中に予浸)、セルガード-セパレータ、50μLの電解質液滴、負極、スペーサ、波形バネ、及び負のケーシングをその順序で積み重ねることによって、セルを調製した。80kg/cm2の圧力で、MTI corp.製の手動圧接プレスを用いて、圧接を行った。
リチウム試料の不動態化を、2ステップで行った。最初に、上記セクション1に記載のセルを、セルが対称である(Li金属がアノード及びカソードの両方に対して選択される)ように構築した。次に、セルを、電流密度0.60mA/cm2で5回、半サイクル当たり2時間でサイクリングし、1.20mAh/cm2の容量を得た。その後、セルを12時間静置した後、取り出し、SEIを含む不動態化Li電極を、リチウムセルから引き抜く。
不動態化リチウム電極を含むコインセルを、以下の条件下で数回充電及び放電し、その充電-放電サイクル性能を決定する:カソードとして銅箔及びアノードとしてリチウム箔からなるセル構成を使用して、クーロン効率をBiologic VMP-3ポテンショスタットで測定する。初めに、ある特定量のリチウム金属(3.80mAhの容量に相当する約1mg/50μLの電解質)を、0.38mA/cm2の定電流を使用して銅箔上にメッキし、その後、逆電流を最大0.50Vの電位に印加することによって、Qcleanを得、これを使用して、CE1st=Qclean/Qinitialにより図1及び図2中の1番目のサイクル効率を計算する。
スルホラン(SL)対リチウムビス(トリフルオロメタンソルフォニル)イミド(LiTFSI)のモル比に対するサイクリング効率の関係を試験するために、0.5のステップでモル比を2:1から4:1まで変化させ、この間10体積%のFEC含有量を一定に維持し、第1の充電及び放電サイクル並びに後続の充電及び放電サイクルでクーロン効率を測定した。実験結果を図1に示す。
Claims (10)
- リチウム二次電池に好適なスルホラン(SL)系電解質組成物であって、
39.0体積%≦x≦47.5体積%の量(x)のリチウムビス(トリフルオロメタンソルフォニル)イミド(LiTFSI)、及び
1.0≦y≦15.0体積%の量(y)のフルオロエチレンカーボネート(FEC)を含み、
SL/LiTFSIが、2.0≦z≦3.5のモル比(z)で含まれる、電解質組成物。 - FECが、2.0≦y≦15.0体積%の量(y)で含まれる、請求項1に記載の電解質組成物。
- FECが、2.5≦y≦15.0体積%の量(y)で含まれる、請求項1又は2に記載の電解質組成物。
- FECが、10.0≦y≦15.0体積%の量(y)で含まれる、請求項1~3のいずれか一項に記載の電解質組成物。
- FECが、10.0体積%の量で含まれる、請求項1~4のいずれか一項に記載の電解質組成物。
- SL/LiTFSIが、2.0<z≦3.5のモル比(z)で含まれる、請求項1~5のいずれか一項に記載の電解質組成物。
- SL/LiTFSIが、2.5≦z≦3.5のモル比(z)で含まれる、請求項1~6のいずれか一項に記載の電解質組成物。
- SL/LiTFSIが、2.5<z<3.5のモル比(z)で含まれる、請求項1~7のいずれか一項に記載の電解質組成物。
- SL/LiTFSIが、2.5<z≦3.0のモル比(z)で含まれる、請求項1~8のいずれか一項に記載の電解質組成物。
- 請求項1~9のいずれか一項に記載の電解質組成物を含む、リチウム二次電池セル。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201962951036P | 2019-12-20 | 2019-12-20 | |
US62/951,036 | 2019-12-20 | ||
EP19218679 | 2019-12-20 | ||
EP19218679.9 | 2019-12-20 | ||
PCT/EP2020/087384 WO2021123408A1 (en) | 2019-12-20 | 2020-12-21 | Electrolyte for li secondary batteries |
Publications (2)
Publication Number | Publication Date |
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JP2023510120A JP2023510120A (ja) | 2023-03-13 |
JP7342273B2 true JP7342273B2 (ja) | 2023-09-11 |
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JP2022537745A Active JP7342273B2 (ja) | 2019-12-20 | 2020-12-21 | Li二次電池用の電解質 |
Country Status (6)
Country | Link |
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US (1) | US20230019330A1 (ja) |
EP (1) | EP4078711B1 (ja) |
JP (1) | JP7342273B2 (ja) |
KR (1) | KR20220117314A (ja) |
CN (1) | CN114868289A (ja) |
WO (1) | WO2021123408A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016173890A (ja) | 2015-03-16 | 2016-09-29 | 日立マクセル株式会社 | 非水二次電池用電極および非水二次電池 |
JP2016192383A (ja) | 2015-03-31 | 2016-11-10 | トヨタ自動車株式会社 | リチウム二次電池および該電池の製造方法 |
WO2017038816A1 (ja) | 2015-08-31 | 2017-03-09 | 積水化学工業株式会社 | 電解液およびリチウムイオン二次電池 |
JP2017107830A (ja) | 2015-06-19 | 2017-06-15 | 株式会社日本触媒 | 非水電解液およびそれを用いた非水電解液二次電池 |
CN107528089A (zh) | 2017-08-18 | 2017-12-29 | 中国科学院过程工程研究所 | 纳米结构锂电池电解液添加剂、其制备方法和电解液 |
JP2020145054A (ja) | 2019-03-05 | 2020-09-10 | 株式会社日立製作所 | 非水電解液、半固体電解質層、二次電池用シート及び二次電池 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2016204278A1 (ja) * | 2015-06-19 | 2016-12-22 | 株式会社日本触媒 | 非水電解液およびそれを用いた非水電解液二次電池 |
EP3504749A4 (en) * | 2016-08-29 | 2020-05-06 | QuantumScape Corporation | SOLID STATE RECHARGEABLE BATTERY CATHOLYTES, BATTERY ARCHITECTURES SUITABLE FOR USE WITH SUCH CATHOLYTES, AND METHODS OF MAKING AND USING THE SAME |
US11094966B2 (en) * | 2017-03-02 | 2021-08-17 | Battelle Memorial Institute | High efficiency electrolytes for high voltage battery systems |
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2020
- 2020-12-21 CN CN202080087248.XA patent/CN114868289A/zh active Pending
- 2020-12-21 JP JP2022537745A patent/JP7342273B2/ja active Active
- 2020-12-21 WO PCT/EP2020/087384 patent/WO2021123408A1/en active Search and Examination
- 2020-12-21 KR KR1020227025139A patent/KR20220117314A/ko active Search and Examination
- 2020-12-21 US US17/785,459 patent/US20230019330A1/en active Pending
- 2020-12-21 EP EP20838503.9A patent/EP4078711B1/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016173890A (ja) | 2015-03-16 | 2016-09-29 | 日立マクセル株式会社 | 非水二次電池用電極および非水二次電池 |
JP2016192383A (ja) | 2015-03-31 | 2016-11-10 | トヨタ自動車株式会社 | リチウム二次電池および該電池の製造方法 |
JP2017107830A (ja) | 2015-06-19 | 2017-06-15 | 株式会社日本触媒 | 非水電解液およびそれを用いた非水電解液二次電池 |
WO2017038816A1 (ja) | 2015-08-31 | 2017-03-09 | 積水化学工業株式会社 | 電解液およびリチウムイオン二次電池 |
CN107528089A (zh) | 2017-08-18 | 2017-12-29 | 中国科学院过程工程研究所 | 纳米结构锂电池电解液添加剂、其制备方法和电解液 |
JP2020145054A (ja) | 2019-03-05 | 2020-09-10 | 株式会社日立製作所 | 非水電解液、半固体電解質層、二次電池用シート及び二次電池 |
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Publication number | Publication date |
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WO2021123408A1 (en) | 2021-06-24 |
CN114868289A (zh) | 2022-08-05 |
JP2023510120A (ja) | 2023-03-13 |
US20230019330A1 (en) | 2023-01-19 |
KR20220117314A (ko) | 2022-08-23 |
EP4078711B1 (en) | 2024-02-07 |
EP4078711A1 (en) | 2022-10-26 |
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