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Electrolyte Formulation For Reduced Gassing Wide Temperature Range Cycling

A technology of non-aqueous electrolyte and electrolyte solution, applied in non-aqueous electrolyte storage battery, electrolyte storage battery manufacturing, lithium storage battery and other directions, can solve the problems of detrimental battery performance and life, increasing volume, weight complexity and cost, limiting battery application, etc. Achieve the effect of improving power, improving battery charge-discharge cycle efficiency, and reducing gas evolution

Inactive Publication Date: 2016-05-18
A123 SYSTEMS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Extremely high or low temperatures can impair battery performance and / or life
To address performance issues at extreme temperatures, batteries can also be incorporated into heating and / or cooling systems, adding size, weight, complexity and cost
In many cases, this limits the use of batteries in extreme temperature environments

Method used

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  • Electrolyte Formulation For Reduced Gassing Wide Temperature Range Cycling
  • Electrolyte Formulation For Reduced Gassing Wide Temperature Range Cycling
  • Electrolyte Formulation For Reduced Gassing Wide Temperature Range Cycling

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0125] Example 1: Electrolyte Formulation

[0126] Example electrolyte formulations according to the present disclosure include: LiPF 6 , 1.0M; LiTFSI, 0.15M; EC, 40vol.%; EMC, 45vol.%; DEC, 10vol.%; PC, 5vol.%; ES, 1.5wt.%; VC, 1wt.%; wt.%.

[0127] The electrolyte formulations were compared with the control electrolyte formulations, as follows and with reference to Figure 1 to Figure 10 discussed. The electrolyte formulation exhibits improved performance in low and high temperature tests relative to a control electrolyte formulation.

[0128]The first control electrolyte formulation contains: LiPF 6 EC, 30 vol.%; EMC, 55 vol.%; DEC, 10 vol.%; PC, 5 vol.%; ES, 1 wt.%; and VC, 2 wt.%. The first control electrolyte formulation contained the sulfonyl-containing first additive ES, but did not provide the salt solution and anti-gassing additives of the present application.

[0129] The second control electrolyte formulation contains: LiPF 6 , 1.15M; EC, 35vol.%; EMC, 40v...

example 2

[0148] Example 2: Electrolyte formulation for control group

[0149] The electrolyte formula of the control group was composed of 1MLiPF 6 Composition, wherein: EC:PC:EMC:DEC=35:5:50:10v / v%+VC2wt.%, "EC" means ethylene carbonate; "PC" means propylene carbonate; "EMC" means methyl ethyl carbonate ester; "DEC" means diethyl carbonate; and "VC" means vinylene carbonate.

example 3

[0150] Example 3: Electrolyte Formulation Containing ES Only

[0151] This electrolyte formula consists of 1MLiPF 6 Composition, wherein, EC:PC:EMC:DEC=35:5:50:10v / v%)+ES1wt%. Here, "ES" means vinyl sulfite. The addition of ES reduces the impedance because ES reacts with the anode to form a solid electrolyte interface (SEI) that is more ionically conductive than the control electrolyte mentioned above. However, during formation, cells with this electrolyte (ie, one containing only ES additives) cannot be charged because the SEI is unstable and a large amount of gas is generated during decomposition.

[0152] Figure 13 This effect is shown where a carbon-based anode is charged with a lithium half-cell for the first time (the "forming" phase of the SEI curve). A slurry containing: 92 wt% artificial graphite dissolved in N-methylpyrrolidone (NMP), 4 wt% conductive graphite additive and 4 wt% polyvinylidene fluoride ( PVDF) binder, dried in an oven and calendered to form t...

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Abstract

A rechargeable battery cell having a specific combination of anode, cathode and electrolyte formulation is provided. The electrolyte formulation includes an additive system and a salt system. The additive system includes a first additive containing a sulfonyl group, an anti-gassing agent, and a second additive. The salt system includes a lithium salt and a co-salt. The disclosed electrolyte formulation has reduced gassing and improved performance over a wide temperature range.

Description

technical field [0001] The present disclosure relates to a non-aqueous electrolyte rechargeable battery having excellent low-temperature characteristics, long-term stability, and high energy density. Background technique [0002] Rechargeable batteries generate energy through electrochemical reactions. In conventional rechargeable batteries, the battery is designed to perform optimally at or near room temperature. Extremely high or low temperatures can impair battery performance and / or life. To address performance issues at extreme temperatures, batteries can also be incorporated into heating and / or cooling systems, which add size, weight, complexity and cost. In many cases, this limits the use of batteries in extreme temperature environments. Contents of the invention [0003] The inventors of the present disclosure believe that improved electrolyte formulations can be provided, thereby improving performance at extreme temperatures and reducing gassing. Some rechargea...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/0567H01M4/133H01M4/136H01M4/58H01M10/0568H01M10/0569
CPCH01M10/0525H01M10/0567H01M10/0568H01M10/058H01M10/056H01M10/052Y02E60/10Y02P70/50
Inventor L·J·皮奈尔C·坎皮恩A·S·格兹泽J·J·曹
Owner A123 SYSTEMS LLC
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