Lithium ion battery amide-type additive having film-forming and stabilizing functions and electrolyte containing same
A technology of lithium-ion batteries and film-forming additives, applied in the field of lithium-ion batteries, can solve the problems of high price and harsh preparation conditions, and achieve the effects of inhibiting reactions, improving charge-discharge efficiency and cycle life
Inactive Publication Date: 2015-04-15
INST OF PROCESS ENG CHINESE ACAD OF SCI
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Problems solved by technology
Among them, vinylene carbonate (VC) has been reported to have a better effect, but its preparation conditions are harsh and the price is expensive.
Method used
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Experimental program
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Effect test
Embodiment 1
[0015] In a high-purity argon atmosphere glove box, mix ethylene carbonate (EC), ethyl methyl carbonate (EMC) and dimethyl carbonate (DMC) at a weight ratio of EC:EMC:DMC=1:1:1 , using lithium hexafluorophosphate as the lithium salt to prepare an electrolyte solution with a lithium salt concentration of 1mol / L, and adding a film-forming additive nicotinamide at a concentration of 0.1wt.%.
Embodiment 2
[0019] The preparation method of the electrolyte is the same as in Example 1, except that 0.1 wt.% isonicotinamide is added to the electrolyte.
Embodiment 3
[0021] The preparation method of the electrolyte is the same as in Example 1, except that 2wt.% of 2-pyridinecarboxamide is added to the electrolyte.
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The invention discloses a lithium ion battery amide-type additive having film-forming and stabilizing functions and electrolyte containing the same. The invention relates to an amide-type additive, which is suitable for lithium ion battery and has the film-forming and stabilizing functions. The additive can prominently promote the forming of SEI membrane and at the same time can control water content of electrolyte, and thus the cycle performance and safety of lithium ion battery are improved. The structure of the amide-type additive is shown in the description, wherein the R represents a five-membered or six-membered nitrogen-containing heterocyclic group, such as pyrrole, imidazole, pyridine, pyridazine, pyrimidine, pyrazine, and the like.
Description
technical field [0001] The invention relates to an amide bifunctional additive used for lithium-ion batteries, which has film-forming and stabilizing effects, and an electrolytic solution containing the additive, belonging to the field of lithium-ion batteries. Background technique [0002] Lithium-ion battery is the fastest-growing ideal energy source in the 21st century. It has the advantages of large specific energy, high voltage, long cycle life, and small self-discharge. In the field of power batteries, and in addition to civilian electronic products, lithium-ion batteries have gradually replaced traditional nickel-cadmium batteries to become the mainstream power supply in the field of military communications, and are also the key direction for the development of new communication power supplies. [0003] Electrolyte is an important part of lithium-ion batteries. It is responsible for the transmission of ions between the positive and negative electrodes through the inte...
Claims
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IPC IPC(8): H01M10/0567
CPCH01M10/0525H01M10/0567H01M2300/0025Y02E60/10
Inventor 刘恋蔡迎军任天鹭吕兴梅张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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