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Nonaqueous electrolyte, nonaqueous electrolyte secondary battery, and energy device

A technology of non-aqueous electrolyte and secondary battery, which is applied in the field of non-aqueous electrolyte, non-aqueous electrolyte secondary battery and energy devices, and can solve problems such as battery expansion

Pending Publication Date: 2020-05-05
MITSUBISHI CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When carbon and silicon compounds are used in combination as the negative electrode active material, there is a problem that the thickness of the negative electrode expands due to repeated charge and discharge, which causes the battery to swell.

Method used

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  • Nonaqueous electrolyte, nonaqueous electrolyte secondary battery, and energy device
  • Nonaqueous electrolyte, nonaqueous electrolyte secondary battery, and energy device
  • Nonaqueous electrolyte, nonaqueous electrolyte secondary battery, and energy device

Examples

Experimental program
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no. 1 approach

[0113] Hereinafter, the first embodiment of the present invention will be described in detail. The following embodiments are examples (representative examples) of this embodiment, and this embodiment is not limited to these contents. This embodiment can be arbitrarily changed and implemented in the range which does not deviate from the summary.

[0114] The non-aqueous electrolytic solution of the present embodiment is a non-aqueous electrolytic solution for a non-aqueous electrolytic solution secondary battery, and the non-aqueous electrolytic solution secondary battery has:

[0115] a positive electrode capable of intercalating and deintercalating metal ions;

[0116] A negative electrode capable of intercalating and deintercalating metal ions and comprising a negative electrode active material, wherein the negative electrode active material contains a metal compound-based material and graphite, and the metal compound-based material includes a metal capable of alloying with...

no. 2 approach

[0685] Hereinafter, a second embodiment of the present invention will be described in detail. The following embodiments are examples (representative examples) of this embodiment, and this embodiment is not limited to these contents. This embodiment can be arbitrarily changed and implemented in the range which does not deviate from the summary.

[0686] The non-aqueous electrolytic solution of the present embodiment is a non-aqueous electrolytic solution secondary battery provided with a positive electrode, a negative electrode and a non-aqueous electrolytic solution, wherein the positive electrode contains a metal oxide represented by the following composition formula (14),

[0687] Li a101 Ni b101 co c101 m d101 o 2 ...(14)

[0688] (In the above formula (14), a101, b101, c101 and d101 are expressed as values ​​of 0.90≤a101≤1.10, 0.50≤b101≤0.98, 0.01≤c101<0.50, 0.01≤d101<0.50, and satisfy b101+c101+d101 =1; M represents at least one element selected from t...

no. 3 approach

[0783] Hereinafter, a third embodiment of the present invention will be described in detail. The constituent requirements described below are an example (representative example) of this embodiment, and this embodiment is not limited to these specific contents, and can be implemented with various changes within the scope of the gist.

[0784] The non-aqueous electrolytic solution of the present embodiment is a non-aqueous electrolytic solution for an energy device, wherein,

[0785] The non-aqueous electrolytic solution is a non-aqueous electrolytic solution containing the following (A) and (B).

[0786] (A) a compound represented by the following general formula (21);

[0787] (B) a salt containing an anion having at least one bond selected from the group consisting of F-P-O bond, F-S-O bond or F-S=O bond,

[0788] [chem 39]

[0789]

[0790] (In general formula (21), R 211 , R 212 and R 213 each independently being an alkyl group with or without s...

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Abstract

The present invention addresses the problem of providing a nonaqueous electrolyte secondary battery with less battery swelling during repeated charging and discharging. Provided is a nonaqueous electrolyte used for a nonaqueous electrolyte secondary battery, the nonaqueous electrolyte secondary battery being provided with: a positive electrode capable of occluding and releasing metal ions; a negative electrode capable of occluding and releasing metal ions and including a negative electrode active material (wherein the negative electrode active material contains: a metal compound-based materialcomprising a metal alloyable with Li; and graphite); and a nonaqueous electrolyte comprising a nonaqueous solvent and an electrolyte dissolved in the nonaqueous solvent, wherein the nonaqueous electrolyte contains at least one compound represented by general formula (A) or (B). R1-R3 each represent an alkyl group having 1-10 carbon atoms which may have a substituent or an aryl group having 6-18 carbon atoms which may have a substituent, X represents hydrogen, or an alkenyl group or alkynyl group having 1-10 carbon atoms. R4-R6 each represent a hydrocarbon group having 1-20 carbon atoms whichmay have a substituent, and Y represents S, NH or NR7. R7 represents a hydrocarbon group having 1-20 carbon atoms.

Description

technical field [0001] The invention relates to a non-aqueous electrolyte, a non-aqueous electrolyte secondary battery and an energy device. Background technique [0002] Lithium primary batteries, lithium secondary batteries, electric double layer capacitors, lithium ion capacitors, etc. Energy devices are being put into practical use. However, in recent years, there has been an increasing demand for higher performance of energy devices. [0003] Among them, many studies have been conducted in the field of positive electrode and negative electrode active materials, and additives for nonaqueous electrolyte solutions as methods for improving battery characteristics of nonaqueous electrolyte solution secondary batteries. [0004] For example, Patent Document 1 discloses a study on improving the cycle capacity retention rate by making the non-aqueous electrolyte contain a specific silicon compound containing at least two or more unsaturated bonds and a specific salt containin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01G11/06H01G11/46H01G11/62H01G11/64H01M6/16H01M10/0568H01M10/0569
CPCH01M10/0567H01G11/06H01G11/46H01G11/62H01G11/64Y02E60/10H01M4/625H01M4/134H01M4/386H01M4/483H01M4/525H01M4/505H01M10/0525H01M2004/027H01M2004/028H01G11/50Y02T10/70H01M10/0568
Inventor 渡会笃中泽英司泽脩平
Owner MITSUBISHI CHEM CORP
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