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Electrolyte for lithium battery, lithium battery and application of dicarboxylate solvent

A technology of ester solvents and electrolytes, applied in lithium batteries, secondary batteries, organic electrolytes, etc., can solve the problems of unreliable safety and poor thermal shock performance of lithium batteries, and achieve easy wetting of pole pieces and diaphragms, flow Good performance and increased safety and reliability

Inactive Publication Date: 2020-10-16
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lithium battery prepared by this electrolyte will have the problem of poor thermal shock performance, and the safety needs to be improved.

Method used

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  • Electrolyte for lithium battery, lithium battery and application of dicarboxylate solvent
  • Electrolyte for lithium battery, lithium battery and application of dicarboxylate solvent
  • Electrolyte for lithium battery, lithium battery and application of dicarboxylate solvent

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Embodiment Construction

[0036] The technical solutions of the present invention will be further described below through specific embodiments. It should be clear to those skilled in the art that the embodiments are only for helping to understand the present invention, and should not be regarded as specific limitations on the present invention.

[0037] The following examples and comparative examples respectively provide a lithium battery. The composition of the electrolyte is shown in Table 1, and the composition of the positive electrode, negative electrode, and separator is shown in Table 2.

[0038] Table 1

[0039]

[0040] In Table 1, the percentage represents the percentage of each component accounting for the total mass of the electrolyte;

[0041] In Table 1, the structure of D1 is as follows:

[0042]

[0043] Table 2

[0044]

[0045] In the above positive electrode formula, the numbers represent the mass ratio between different positive electrode materials, and the negative elec...

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Abstract

The invention relates to an electrolyte for a lithium battery, the lithium battery and application of a dicarboxylate solvent, the electrolyte comprises a lithium salt and a solvent, and the solvent comprises a compound shown as a formula A. The solvent shown in the formula A is added into the electrolyte, the liquid path of the solvent is wide, and the high and low temperature performance of thelithium battery can be improved; secondly, the solvent has better stability in a high-voltage system, so that the safety and reliability of the lithium battery are improved; meanwhile, compared with other solvents, the solvent is low in viscosity, good in fluidity and easy to infiltrate pole pieces and diaphragms, the alternating-current internal resistance and the direct-current internal resistance of the lithium battery are reduced, and the power performance and the cycle performance of the battery are improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to an electrolyte solution for a lithium battery, a lithium battery, and applications of dicarboxylate solvents. Background technique [0002] With the increasing demand for lithium batteries in electric tools, electric vehicles and energy storage base stations, the development of lithium batteries with higher performance and lower cost is particularly important. At present, the core of improving battery performance and reducing battery cost is the positive electrode material (the cost of positive electrode materials accounts for no less than 30% of the battery cost, and the ternary positive electrode materials account for no less than 45%). At present, increasing the working voltage of the battery can effectively increase the energy density of the battery and reduce the cost: on the one hand, increasing the voltage can increase the average working voltage of the battery; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0569H01M10/052
CPCH01M10/052H01M10/0569H01M2300/0025Y02E60/10
Inventor 赵生荣
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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