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Flame-retardant sodium ion battery electrolyte

A sodium-ion battery and electrolyte technology, applied in secondary batteries, organic electrolytes, non-aqueous electrolytes, etc., can solve the problems of scarcity and uneven distribution of lithium resources, reduce internal resistance, ease the increase of internal resistance, and suppress internal resistance. The effect of increased resistance

Pending Publication Date: 2022-02-11
HENAN FAENLAITE NEW ENERGY SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since 2010, people have gradually realized that lithium resources are scarce and unevenly distributed. Especially in the context of the global renewable energy revolution, lithium-ion batteries alone are not enough to support human beings to fully move towards electrification and sustainable development. The road to renewable energy

Method used

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  • Flame-retardant sodium ion battery electrolyte
  • Flame-retardant sodium ion battery electrolyte
  • Flame-retardant sodium ion battery electrolyte

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1: a kind of flame-retardant sodium ion battery electrolyte, comprises organic solvent, sodium salt and additive; Described additive comprises flame-retardant additive and film-forming additive; Described flame-retardant additive comprises three-(2,2,2 - one or both of trifluoroethyl) phosphate and two (2,2,2-trifluoroethyl) methyl phosphate; the film-forming additive is fluoroethylene carbonate; barrier of the present invention Tris-(2,2,2-trifluoroethyl) phosphate and bis(2,2,2-trifluoroethyl) methyl phosphate used in fuel additives will release P-containing or The free radicals of F combine with the free radicals of H to form non-combustible substances and block the chain reaction of combustion, thus effectively flame retardant;

[0026] The film-forming additive of the present invention selects fluoroethylene carbonate instead of conventional vinylene carbonate. After the decomposition of fluoroethylene carbonate, HF can be produced and VC can be produced...

Embodiment 2

[0038] Embodiment 2: A kind of flame-retardant sodium-ion battery electrolyte; Prepared by the following method, at room temperature, in the glove box, ethylene carbonate, ethyl methyl carbonate, diethyl carbonate, and propylene carbonate are configured according to the mass ratio A mixed solvent, dissolving the sodium salt in the mixed solvent, the weight ratio of the sodium salt to the mixed solvent is 15:85, and then adding flame retardant additives and film-forming additives.

[0039] Wherein, the flame retardant additive is 0.5-1.5 parts of tris-(2,2,2-trifluoroethyl) phosphate; the film-forming additive is 1-2 parts of fluoroethylene carbonate; the organic The solvent includes 20-30 parts of ethylene carbonate, 35-45 parts of ethyl methyl carbonate, 15-25 parts of diethyl carbonate and 10-20 parts of propylene carbonate; the sodium salt is 10-20 parts sodium hexafluorophosphate.

Embodiment 3

[0040] Embodiment 3: A kind of flame-retardant sodium-ion battery electrolyte; Prepared by the following method, at room temperature, in a glove box, ethylene carbonate, ethyl methyl carbonate, diethyl carbonate, and propylene carbonate are configured according to the mass ratio A mixed solvent, dissolving the sodium salt in the mixed solvent, the weight ratio of the sodium salt to the mixed solvent is 15:85, and then adding flame retardant additives and film-forming additives.

[0041] Wherein, the flame retardant additive is 0.5 part of tri-(2,2,2-trifluoroethyl) phosphate; the film-forming additive is 1 part of fluoroethylene carbonate; the organic solvent includes 20 Parts of ethylene carbonate, 35 parts of ethyl methyl carbonate, 15 parts of diethyl carbonate and 10 parts of propylene carbonate; the sodium salt is 10 parts of sodium hexafluorophosphate.

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Abstract

The invention discloses a flame-retardant sodium-ion battery electrolyte which comprises an organic solvent, sodium salt and an additive, the additive comprise a flame-retardant additive and a film-forming additive; and the flame- retardant additive comprises one or two of tris (2, 2, 2-trifluoroethyl) phosphate and bis (2, 2, 2-trifluoroethyl) methyl phosphate; the film forming additive is fluoroethylene carbonate; and the additive also comprises a functional auxiliary agent. The flame-retardant additive disclosed by the invention has the beneficial effects that the tri-(2, 2, 2-trifluoroethyl) phosphate and the bis (2, 2, 2-trifluoroethyl) methyl phosphate adopted in the flame-retardant additive can release free radicals containing P or F to be combined with H free radicals when being heated to generate non-combustible substances and block a chain reaction of combustion, so that flame is effectively retarded; and the fluoroethylene carbonate is selected as the film-forming additive, so that the film-forming requirement is met, the internal resistance is reduced, and the problem that the internal resistance is increased after the flame retardant generates incombustible substances is solved.

Description

technical field [0001] The invention relates to a sodium-ion battery electrolyte, in particular to a flame-retardant sodium-ion battery electrolyte. Background technique [0002] Sodium-ion batteries were proposed at the same time as lithium-ion batteries in the 1970s, but the excellent performance of lithium-ion batteries made scientists give up research on sodium-ion batteries, and almost all invested in the research and development of lithium-ion batteries. Lithium-ion batteries Great progress has also been made in the past 50 years. Especially in 1990, Sony realized the commercialization of lithium-ion battery technology, which led to the rapid development of lithium-ion battery technology, but the research on sodium-ion batteries was relatively stagnant during the same period. [0003] However, since 2010, people have gradually realized that lithium resources are scarce and unevenly distributed. Especially in the context of the global renewable energy revolution, lithiu...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/42H01M10/054
CPCH01M10/0567H01M10/4235H01M10/054H01M2300/0025Y02E60/10
Inventor 邵俊华孔东波张利娟宋东亮王亚洲李海杰韩飞郭飞王郝为闫国锋龚国斌
Owner HENAN FAENLAITE NEW ENERGY SCI & TECH CO LTD
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