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Electrolyte for lithium battery, lithium battery and application of bis-borate solvent

A technology of ester solvents and electrolytes, applied in the application field of double borate solvents, can solve the problems of limited safety improvement, achieve the effects of increasing safety and reliability, good fluidity, and improving DC internal resistance growth

Inactive Publication Date: 2020-11-03
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the boron element in the electrolyte appears as an additive, and the improvement of safety is limited.

Method used

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  • Electrolyte for lithium battery, lithium battery and application of bis-borate solvent
  • Electrolyte for lithium battery, lithium battery and application of bis-borate solvent
  • Electrolyte for lithium battery, lithium battery and application of bis-borate solvent

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Embodiment Construction

[0034] 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.

[0035] 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.

[0036] Table 1

[0037]

[0038]

[0039] In Table 1, the percentage represents the percentage of each component accounting for the total mass of the electrolyte;

[0040] In Table 1, the structure of D1 is as follows:

[0041]

[0042] Table 2

[0043]

[0044]

[0045] In the above positive electrode formula, the numbers represent the mass ratio between different positive electrode material...

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Abstract

The invention relates to an electrolyte for a lithium battery, the lithium battery and application of a bis-borate solvent. The electrolyte comprises a lithium salt and a solvent, and the solvent comprises a compound shown in a formula A. The electrolyte disclosed by the invention has a relatively wide liquid range, and the high-low temperature performance and the safety performance of the batteryare considered; the prepared lithium battery has excellent cycle life, the high-temperature gas production of the battery and the increase of direct-current internal resistance in the cycle process are improved, and the safety and the reliability of the battery are improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to an electrolyte for a lithium battery, a lithium battery, and the application of a double borate solvent. Background technique [0002] Due to the development of mobile communication, digital products, electric tools and electric vehicles in modern society, the demand for high-energy power supply is increasingly urgent. Lithium-ion batteries are being widely studied as a chemical energy storage system with high energy density, excellent cycle performance and environmental friendliness, and the electrolyte, as the bridge connecting the positive and negative electrodes of lithium batteries, has great influence on the application range, safety performance and capacity of the battery. play an important role. [0003] An ideal electrolyte should have the following characteristics: high ionic conductivity, stable over a wide temperature range, low electronic conductivity, goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0569H01M10/0567H01M10/052
CPCH01M10/052H01M10/0567H01M10/0569H01M2300/0037Y02E60/10
Inventor 赵生荣
Owner HUBEI JINQUAN NEW MATERIALS CO LTD