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Non-aqueous electrolyte used for layered manganese acid lithium battery

A non-aqueous electrolyte, layered lithium manganate technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problem of not finding the high voltage characteristics of layered lithium manganate batteries, and achieve cost reduction and improvement. Excellent effect of cycle life and cycle characteristics

Active Publication Date: 2013-10-23
ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furanone derivatives and furanone are two different substances, and the applicant has not retrieved any reports about using furanone derivatives to improve the high-voltage characteristics of layered lithium manganate batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] lithium salt LiPF 6 It is dissolved in the mixed solvent of ethylene carbonate / ethyl methyl carbonate / dimethyl carbonate / propylene carbonate with a mass ratio of 30 / 55 / 10 / 5 to obtain an electrolytic solution, wherein LiPF 6 The concentration is 1 mole / liter, and 1% of vinylene carbonate and 0.5% of Obtain the electrolyte solution of the present invention, use the electrolyte solution of the present invention for the layered lithium manganate battery, test the cycle performance of the layered lithium manganate battery under normal temperature environment voltage 4.2V and 4.4V, 1C rate charge and discharge, in Table 1 Test results are listed.

Embodiment 2

[0025] lithium salt LiPF 6 It is dissolved in the mixed solvent of ethylene carbonate / ethyl methyl carbonate / dimethyl carbonate / propylene carbonate with a mass ratio of 30 / 55 / 10 / 5 to obtain an electrolytic solution, wherein LiPF 6 The concentration is 1 mole / liter, and 1% of 1,3-propiolactone sulfonate and 0.5% of Obtain the electrolyte solution of the present invention, use the electrolyte solution of the present invention for the layered lithium manganate battery, test the cycle performance of the layered lithium manganate battery under normal temperature environment voltage 4.2V and 4.4V, 1C rate charge and discharge, in Table 1 Test results are listed.

Embodiment 3

[0027] lithium salt LiPF 6 It is dissolved in the mixed solvent of ethylene carbonate / ethyl methyl carbonate / dimethyl carbonate / propylene carbonate with a mass ratio of 30 / 55 / 10 / 5 to obtain an electrolytic solution, wherein LiPF 6 The concentration is 1 mole / liter, and 1% of vinylene carbonate and 1.5% of Obtain the electrolyte solution of the present invention, use the electrolyte solution of the present invention for the layered lithium manganate battery, test the cycle performance of the layered lithium manganate battery under normal temperature environment voltage 4.2V and 4.4V, 1C rate charge and discharge, in Table 1 Test results are listed.

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Abstract

The invention discloses a non-aqueous electrolyte used for a layered manganese acid lithium battery. The non-aqueous electrolyte comprises a non-aqueous organic solvent, lithium salt and a film forming additive, wherein the non-aqueous electrolyte further comprises one or more furanone derivatives; the molecular formula of the furanone derivative is shown in the specification, wherein R1-R4 are independently selected from one of hydrogen, hydroxyl, halogen, alkyl, alkoxy, halogenated alkyl, halogenated alkoxy, alkylene, halogenated alkylene, phenyl, halogenated phenyl, biphenyl, halogenated biphenyl, phenyl ether, triphenyl, halogenated phenyl ether, halogenated triphenyl, amido and ester group; R1-R4 are not hydrogen simultaneously; halogen is F, Cl or Br; the halogenation is partial substitution or full substitution; and the furanone derivatives account for 0.01-3% of the total mass of the non-aqueous electrolyte. By applying the non-aqueous electrolyte, the cycle life of the layered manganese acid lithium battery under a high voltage can be greatly improved.

Description

technical field [0001] The invention relates to a lithium ion battery electrolyte, in particular to a nonaqueous electrolyte suitable for a layered lithium manganate battery. Background technique [0002] Due to the advantages of high specific energy, high voltage, small size, light weight, and no memory effect, lithium-ion batteries are currently widely used in portable electronic products such as mobile communications and digital cameras, and are gradually being used in national defense and military applications. Lithium cobalt oxide (LiCoO 2 ), but with the rise of cobalt prices, the cost of lithium-ion batteries using lithium cobaltate as the positive electrode material increases sharply, and, in the lithium cobaltate material, when more than half of the lithium is deintercalated, the crystal structure collapses, and the reversibility decreases. Therefore, it is difficult for lithium-ion batteries to obtain higher energy density. In recent years, based on Li 2 MnO 3 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0566
CPCY02E60/12Y02E60/10
Inventor 陈黎骆宏钧袁翔云
Owner ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
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