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Application of trifluoroethoxy vinyl phosphate in battery electrolyte

A technology of trifluoroethoxy vinyl phosphate and fluoroethoxy vinyl phosphate, which is applied in the field of battery electrolyte additives, can solve the problems of battery capacity loss, increased manufacturing cost, and cumbersome manufacturing process, and achieve good charging and discharging Efficiency and cycle performance, increased storage performance, and effects of improved flame retardancy

Pending Publication Date: 2022-01-11
SHIJIAZHUANG SAN TAI CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, researchers usually carry out surface protection coating on the positive electrode material or add flame-retardant elements with flame-retardant effect to the electrolyte, but these methods are often accompanied by the loss of battery capacity, and the production process is cumbersome. Increased manufacturing costs

Method used

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  • Application of trifluoroethoxy vinyl phosphate in battery electrolyte
  • Application of trifluoroethoxy vinyl phosphate in battery electrolyte
  • Application of trifluoroethoxy vinyl phosphate in battery electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The battery electrolyte includes a mass ratio of 15: 77.2: 7.8 LIPF 6 However, trifluoroacetate and trifluoroethoxy phosphoric acid vinyl phosphate (99.5% or more purity), the moisture content of 27 ppm, acid value of 39 ppm, oxygen, and oxygen content.

Embodiment 2

[0021] The organic solvent is mixed with a volume ratio of 30: 40:30, a methyl propionate and methyl propionate and trifluoroacetate;

[0022] Take the weight ratio of 1: 2 LIBF 4 LISO 3 CF 3 Common as a lithium salt;

[0023] The battery electrolyte includes a mass ratio of 18: 80: 2, an organic solvent and a trifluoroethoxy phroleter (99.5% or more purity), the obtained battery electrolyte 30 ppm, 41 ppm, oxygen <1 ppm.

Embodiment 3

[0025] The volume ratio of 10: 20: 30: 30: 10: 30: 30: 30: Detethyl carbonate, methyl carbonate, diethyl carbonate and trifluoroacetate mixed organic solvent;

[0026] Take the weight ratio of 1: 2: 1 Liclo 4 , LIN (CF 3 SO 2 ) 2 And LIC (CF 3 SO 2 ) 3 Common as a lithium salt;

[0027] The battery electrolyte includes a mass ratio of 15.6: 83: 1.4, a organic solvent, and trifluoroethoxy phrolene (99.5% or more), the water content of 29 ppm, acid value is 40 ppm, oxygen part of the resulting battery electrolyte <1 ppm.

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Abstract

The invention discloses an application of trifluoroethoxy vinyl phosphate in a battery electrolyte, and relates to the technical field of battery electrolyte additives, trifluoroethoxy vinyl phosphate is added into the battery electrolyte as an additive, and the dosage of trifluoroethoxy vinyl phosphate is 1.4-10% of the mass of the battery electrolyte. The prepared battery electrolyte added with trifluoroethoxy vinyl phosphate can effectively improve the flame retardant property, so that the battery electrolyte cannot be ignited, meanwhile, good charge-discharge efficiency and cycle performance can be ensured, and the capacity retention rate can reach 93.1% or above under the condition of 50 DEG C after 300 charge-discharge cycles at 1C; and particularly, the high-temperature cycle performance of the lithium battery is improved, meanwhile, the low-temperature (-40 DEG C) discharge efficiency of 80.01% or above can be guaranteed, the storage performance of the battery can be improved, and other performance of the lithium battery is not affected.

Description

Technical field [0001] The present invention relates to the technical field of battery electrolyte additives, in particular, trifluoroethoxy phosphoric acid vinyl phrolenes in battery electrolyte. Background technique [0002] Recently, the concerns of energy storage technologies have been increasing. As the energy storage technology extends to the extension of equipment such as a portable telephone, a portable camera, a laptop, a personal computer, and an electric vehicle, the demand for high energy density batteries used as such electronic devices is also increasing. Lithium-ion secondary batteries are one of the most satisfactory batteries, and is currently actively conducting various research on their improvements. [0003] Among the secondary batteries currently used, the lithium secondary battery developed in the early 1990s includes an anode made of a carbon material capable of embedding or removing the lithium ion, a cathode made of lithium oxide and one The nonaqueous el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/056
CPCH01M10/0567H01M10/056Y02E60/10
Inventor 高山林胜赛李庆占邢艳召刘鹏田丽霞张茜张民彭鹏鹏郝俊侯荣雪王军葛建民武利斌闫彩桥许晓丹闫朋飞杨世雄赵光华何蕊魏爱佳
Owner SHIJIAZHUANG SAN TAI CHEM CO LTD
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