Flame retardant additive for electrolyte and flame retardant lithium ion battery electrolyte
A technology of lithium-ion batteries and flame-retardant additives, which is applied in the field of electrochemical and chemical power supply products, can solve problems such as flammability, explosion, and poor stability of negative electrodes, and achieve the effect of increasing stability and improving safety performance
Active Publication Date: 2016-08-24
SHANDONG HIRONG POWER SUPPLY MATERIAL
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Problems solved by technology
However, the electrolyte components currently used in lithium batteries are flammable ester or ether mixed solvent systems. Although they have excellent electrochemical performance, they are extremely flammable and even cause explosions, causing personal and property losses. Therefore, the development of non-flammable or ether Flame-resistant lithium battery electrolyte has very important application value
[0003] The main flame retardants currently developed are phosphoric acid esters (US patent US2005277027-A1) and fluoroethers (Chinese patent 200910249883.9), but these compounds have disadvantages such as low flame retardancy and poor negative electrode stability
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Embodiment 25
[0035] in the presence of 1M LiPF 6 Add 17% TFT to the electrolyte of ethylene carbonate, dimethyl carbonate and diethyl carbonate with a volume ratio of 1:1:1. The electrolyte can be completely non-flammable. figure 1 is the cycle performance at the 1C rate of the graphite / lithium manganese oxide battery using the electrolyte. It can be seen from the figure that the use of this electrolyte does not affect the capacity and cycle performance of the battery by more than 10%.
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The invention belongs to the technical field of electrochemical and chemical power products, and particularly relates to a flame-retardant additive for electrolyte and flame-retardant lithium ion battery electrolyte, wherein specifically, fluoroazine ring compounds are contained as a flame-retardant additive. The electrolyte contains fluoroazine ring compounds and has remarkably efficient flame retardance; the electrolyte not only has good compatibility with anode and cathode, but also causes little influence on the battery performance; moreover, the burning safety of the battery is remarkably improved, and the electrolyte has broader application prospects. The flame-retardant electrolyte solution can be applied to lithium primary batteries, lithium secondary batteries and lithium ion batteries.
Description
technical field [0001] The invention belongs to the technical field of electrochemical and chemical power supply products, and specifically relates to a flame-retardant additive for an electrolyte and a flame-retardant lithium-ion battery electrolyte, specifically containing a fluoroazine ring compound as a flame-retardant additive. Background technique [0002] Lithium battery has significant advantages such as high specific energy, low self-discharge rate, and greenness, and is currently the most promising future energy system. However, the electrolyte components currently used in lithium batteries are flammable ester or ether mixed solvent systems. Although they have excellent electrochemical performance, they are extremely flammable and even cause explosions, causing personal and property losses. Therefore, the development of non-flammable or ether Flame-resistant lithium battery electrolyte has very important application value. [0003] The main flame retardants curren...
Claims
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IPC IPC(8): H01M10/0567H01M6/16
CPCH01M6/168H01M10/0567H01M2300/0025Y02E60/10
Inventor 李立飞冯金奎任海赵志华刘永张修涛任加兴刘志辉
Owner SHANDONG HIRONG POWER SUPPLY MATERIAL