Lithium-ion battery and its electrolyte
A technology of lithium ion battery and electrolyte, applied in the field of lithium ion battery and its electrolyte, can solve the problems of increased DC resistance, deterioration of electrochemical performance, etc., and achieve the effect of improving the structure of film formation
Active Publication Date: 2018-10-26
CONTEMPORARY AMPEREX TECH CO
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Problems solved by technology
[0005] In view of the problems existing in the background technology, the object of the present invention is to provide a lithium ion battery and its electrolyte, which effectively solves the problem that the addition of anti-overcharge additives leads to the increase of the DC resistance and the deterioration of the electrochemical performance of the lithium ion battery. problems, while lithium-ion batteries have good overcharge resistance
Method used
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Embodiment 1
[0056] A lithium-ion battery was prepared by referring to the method of Comparative Example 1, except that 2% by weight of anti-overcharge additive biphenyl and 0.005% of auxiliary film-forming additive quercetin were added to the electrolyte.
Embodiment 2
[0058] A lithium-ion battery was prepared by referring to the method of Comparative Example 1, except that 2% by weight of anti-overcharge additive biphenyl and 0.008% of auxiliary film-forming additive quercetin were added to the electrolyte.
Embodiment 3
[0060] A lithium-ion battery was prepared with reference to the method of Comparative Example 1, except that 2% of the anti-overcharge additive biphenyl, 1% of the anti-overcharge additive cyclohexylbenzene and 0.005% of auxiliary components were added to the electrolyte. Membrane additive quercetin.
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Abstract
The invention provides a lithium ion battery and an electrolyte thereof. The electrolyte comprises a lithium salt and a non-aqueous organic solvent, and also comprises an overcharge protect additive and an auxiliary film-forming additive. The lithium ion battery comprises the electrolyte. The lithium ion battery is capable of avoiding problems such as lithium ion battery direct current resistance increasing and electrochemical performance deterioration caused by adding of the overcharge protect additive effectively, and possesses excellent overcharge resistance.
Description
technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium ion battery and an electrolyte thereof. Background technique [0002] When the lithium-ion battery is fully charged and continues to be charged and overcharge occurs, the positive and negative electrodes of the lithium-ion battery will be in an "overloaded" state, so a series of side reactions will occur. At the positive electrode, the non-aqueous organic solvent in the electrolyte is easily oxidized when the potential rises, and the heat released by the oxidation reaction of the non-aqueous organic solvent due to overcharging is much higher than the oxidation of the non-aqueous organic solvent under normal charge and discharge conditions. The heat released by the reaction; at the negative electrode, the intercalation reaction of lithium ions will continue, causing lithium ions to easily deposit on the surface of the negative electrode. These abnormal reactions will ...
Claims
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IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 陈玉君
Owner CONTEMPORARY AMPEREX TECH CO