Phosphor-included additive for the lithium ion battery electrolyte
A lithium-ion battery and electrolyte technology, which is applied in the field of lithium-ion batteries, can solve the problems of lithium-ion battery performance, reduced cycle performance, and capacity reduction with a large amount of additives added, and achieve the effect of small battery capacity and cycle performance
Inactive Publication Date: 2007-08-15
HARBIN INST OF TECH
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that when a flame retardant additive and an anti-overcharge additive are added to the electrolyte, a large amount of the additive has a large negative impact on the performance of the lithium-ion battery, such as: the capacity is significantly reduced, and the cycle performance is reduced and other problems, and a phosphorus-containing additive for lithium-ion battery electrolyte is provided
Method used
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specific Embodiment approach 1
[0010] Embodiment 1: The general formula of the phosphorus-containing additive for lithium-ion battery electrolyte of this embodiment is as follows:
[0011]
[0012] where R 1 , R 2 and R 3 is an alkyl C n H 2n+1 , alkene group, aromatic hydrocarbon group, alkyl group containing F and / or N, alkene group containing F and / or N, or aromatic hydrocarbon group containing one or more of F, N, alkoxy group, wherein R 1 , R 2 and R 3 The number of carbon atoms is 1≤n≤12.
specific Embodiment approach 2
[0013] Specific embodiment 2: R of the phosphorus-containing additive used in the electrolyte of lithium ion battery in this embodiment 1 , R 2 , R 3 One or both of them are alkyl groups containing F and / or N. Others are the same as the first embodiment.
specific Embodiment approach 3
[0014] Specific embodiment 3: R of this embodiment 1 , R 2 and R 3 The number of carbon atoms is 3≤n≤10. Others are the same as the first embodiment.
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Abstract
The phosphor additive for Li-ion cell electrolyte has chemical general formula as following. Wherein, R1, R2 and R3 denote one of CnH2n+1, alkylene, aromatic radical, F- or N-contained alkyl, F- or N-contained alkylene, and the aromatic radical contained of F, N and alkoxy; the carbon atom number in Ri (i = 1, 2, 3) is 1<=n<=12. This invention has well flame-proof effect and can prevent overcharge.
Description
technical field [0001] The invention relates to a class of additives for electrolytes of lithium ion batteries, and belongs to the field of lithium ion batteries. Background technique [0002] Due to the advantages of high specific energy, high voltage, small size, light weight and good safety, lithium-ion secondary batteries have achieved great development in the past ten years and have become one of the main power sources for communication electronic products. Some research units and manufacturers have begun to research and produce high-capacity lithium-ion batteries to power electric vehicles, etc. Although the safety of lithium-ion batteries is greatly improved than that of lithium batteries, there are still many hidden dangers, such as: the organic solvents in the electrolyte are flammable and volatile. Safety issues have become the main factor restricting the use of large-capacity and power-type lithium-ion batteries, especially under abuse conditions (such as high te...
Claims
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Login to View More IPC IPC(8): H01M10/40H01M10/02H01M6/16H01M10/056H01M10/0567
CPCY02E60/122Y02E60/10
Inventor 尹鸽平马玉林左朋建史鹏飞
Owner HARBIN INST OF TECH