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Lithium ion battery electrolyte and constitutive lithium ion battery

A lithium-ion battery and electrolyte technology, applied in the field of lithium-ion batteries, can solve problems such as poor low-temperature performance, achieve the effects of improving low-temperature performance, widening the liquid range, and improving the average discharge voltage

Inactive Publication Date: 2007-06-06
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of poor low-temperature performance of the current lithium-ion battery electrolyte, the purpose of the present invention is to provide a lithium-ion battery electrolyte and a lithium-ion battery composed of

Method used

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  • Lithium ion battery electrolyte and constitutive lithium ion battery
  • Lithium ion battery electrolyte and constitutive lithium ion battery
  • Lithium ion battery electrolyte and constitutive lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 (preparation of electrolyte)

[0025] By mixing EC:DEC:PA=1:1:1 (volume ratio), and adding 1M LiPF in the glove box 6 To prepare 50ml of electrolyte solution, wherein the volume ratio of cyclic carbonate to ester / chain carbonate is 1:2.

Embodiment 2～5

[0026] Embodiment 2~5 (preparation of electrolytic solution)

[0027] Electrolyte is prepared in the same manner as in Example 1, except that the volume content of PA is different, and electrolyte 1M LiPF is prepared respectively 6 EC:DEC:PA=1:1:2, 1M LiPF 6 EC:DEC:PA=1:1:3, 1M LiPF 6 EC:DEC:PA=1:1:4 and 1M LiPF 6 EC:DEC:PA=1:1:5, wherein the volume ratio of cyclic carbonate to ester / chain carbonate is 1:3-1:6, respectively.

Embodiment 6

[0028] Embodiment 6 (preparation of electrolyte)

[0029] By mixing EC:DEC:EMC:PA=1:1:2:6 (volume ratio), and adding 1.2MLiPF in the glove box 6 To prepare 50ml of electrolyte solution, wherein the volume ratio of cyclic carbonate to ester / chain carbonate is 1:9 respectively.

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Abstract

An electrolyte of Li ion cell is prepared from non-aqueous organic solvent, Li salt and prolyl acetate compound. The propyl acetate compound used as cosolvent of electrolyte has low melting point and low viscosity so that low temperature performance of Li ion cell can be effectively improved.

Description

technical field [0001] The invention relates to a lithium-ion battery electrolyte and the lithium-ion battery composed of it. Background technique [0002] Lithium-ion batteries are a new generation of green and environmentally friendly batteries developed in the 1990s. They have the characteristics of high voltage, high specific energy, long charge and discharge life, stable discharge performance, safety, and environmental protection. They have become the leading portable power supply and power battery. . Lithium-ion batteries will become the first choice in those occasions that require high battery electrical performance, energy density, reliability, and safety, such as aviation, aerospace, and military fields. The harsh requirements for lithium-ion batteries in these special fields are mainly reflected in low-temperature performance, cycle life and safety, and the composition of the electrolyte is one of the key factors determining these performances. [0003] Lithium-i...

Claims

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Application Information

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IPC IPC(8): H01M10/40H01M6/16H01M10/0525H01M10/0569
CPCY02E60/122Y02E60/10
Inventor 谢晓华解晶莹孙伟陈立宝
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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