Non-aqueous electrolyte for lithium ion battery and lithium ion battery using non-aqueous electrolyte

A technology for non-aqueous electrolyte and lithium-ion battery, applied in the field of electrolyte for lithium-ion battery and non-aqueous electrolyte for lithium-ion battery, can solve the problem that high temperature performance and low temperature performance cannot be balanced, low impedance additives lack high temperature effect, impedance big problem

Active Publication Date: 2020-11-10
ZHUHAI COSMX BATTERY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Most lithium-ion battery products have the problem that high-temperature performance and low-temperature performance cannot be balanced. For this reason, additives are usually added to the electrolyte to improve the high-low temperature performance of lithium-ion batteries. However, when general additives have better high-temperature effects, the impedance will be lower. Larger, and the high temperature effect of low impedance additives is lacking, so it is necessary to optimize the combination of additives to obtain better high and low temperature performance

Method used

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  • Non-aqueous electrolyte for lithium ion battery and lithium ion battery using non-aqueous electrolyte
  • Non-aqueous electrolyte for lithium ion battery and lithium ion battery using non-aqueous electrolyte
  • Non-aqueous electrolyte for lithium ion battery and lithium ion battery using non-aqueous electrolyte

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Embodiment 1-14 and comparative example 2-9

[0077] The preparation process of Examples 1-14 and Comparative Examples 2-9 is the same as that of Comparative Example 1, the difference is only in the components and contents of the electrolyte, and the specific components and contents added are shown in Table 1 below.

[0078] The composition and content of the electrolytic solution of table 1 embodiment 1-14 and comparative example 1-9

[0079]

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Abstract

The invention provides a non-aqueous electrolyte for a lithium ion battery and the lithium ion battery using the non-aqueous electrolyte. The non-aqueous electrolyte adopted by the invention comprises(a) a lithium salt, (b) a non-aqueous organic solvent and (c) at least one compound as shown in a formula 1, and further comprises at least one of the following components (d) and (e): (d) at least one compound as shown in a formula 2 and (e) an anhydride compound, through the synergistic effect of the components, the battery has better low-temperature charging and discharging performance while improving the high-temperature storage performance and the cycle performance.

Description

technical field [0001] The invention belongs to the technical field of electrolyte solution for lithium ion batteries, and in particular relates to a nonaqueous electrolyte solution for lithium ion batteries and a lithium ion battery using the nonaqueous electrolyte solution. Background technique [0002] Since its commercialization, lithium-ion batteries have been widely used in digital, energy storage, power, military aerospace and communication equipment and other fields due to their light weight, high specific energy, no memory effect, and good cycle performance. With the wide application of lithium-ion batteries, consumers have put forward higher requirements for the energy density, cycle life, high temperature performance, safety and other performance of lithium-ion batteries. [0003] Most lithium-ion battery products have the problem that high-temperature performance and low-temperature performance cannot be balanced. For this reason, additives are usually added to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0567H01M10/4235H01M2300/0025Y02E60/10
Inventor 曾长安李素丽
Owner ZHUHAI COSMX BATTERY CO LTD
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