A kind of non-aqueous electrolyte and lithium ion battery

A non-aqueous electrolyte and lithium salt technology, applied in the field of materials, can solve the problems of high flammability and potential safety hazards of lithium-ion battery technology, and achieve the effects of reducing swelling, excellent thermal stability, and reducing failure rate

Active Publication Date: 2021-03-30
ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high flammability of carbonate materials makes lithium-ion batteries technically a huge safety hazard

Method used

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  • A kind of non-aqueous electrolyte and lithium ion battery
  • A kind of non-aqueous electrolyte and lithium ion battery
  • A kind of non-aqueous electrolyte and lithium ion battery

Examples

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Embodiment Construction

[0021] The present application is described in detail below in conjunction with the examples, but the present application is not limited to these examples. Unless otherwise specified herein, "%" represents mass percentage, and ratio represents mass ratio.

[0022] Table 1 lists the composition of the non-aqueous electrolytes of the examples and the comparative examples, and the capacity retention rate and the flash point of the electrolytes of the batteries using the non-aqueous electrolytes of the examples and the comparative examples. Battery capacity retention test method: add the electrolyte dropwise to the lithium cobalt oxide button, assemble it into a button half battery, charge and discharge at room temperature 0.2C, divide the discharge capacity of 100 cycles by the first cycle The discharge capacity is the capacity retention rate. The flash point of the electrolyte adopts the closed cup method to measure the flash point of the electrolyte prepared by the embodiment ...

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Abstract

The present invention relates to a non-aqueous electrolyte. The non-aqueous electrolyte comprises a lithium salt and an organic solvent; the organic solvent comprises a cyanogen organic silicon compound and other organic solvents; and the mass of the cyanogen organic silicon compound is 50-100% of the total mass of the organic solvent; the other organic solvents are carbonic ester and / or cyanogenorganic solvents. The electrolyte prepared by taking the cyanogen organic silicon compound as a main solvent or a cosolvent has excellent thermal stability; the high-temperature cycle life of a lithium ion battery is obviously prolonged; the swelling of the lithium ion battery is reduced at high temperature; the flame retardance of the electrolyte is fully exerted; the flash point of the non-aqueous electrolyte solution is increased, so that the safety performance of the non-aqueous electrolyte solution is improved; and the failure rate of the battery is reduced better, so that the commercialapplication requirements of the battery can be met.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a nonaqueous electrolyte and a lithium ion battery. Background technique [0002] At present, the non-aqueous solvents used in non-aqueous lithium-ion batteries are mainly organic carbonates and carboxylate compounds. In addition, the electrolyte mixed with LiPF 6 、LiBF 4 , LiClO 4 , LiAsF 6 、LiCF 3 SO 3 , Li 2 SiF 6 and other electrolytes. The carbonate group can increase the dielectric constant of the material and facilitate the dissociation of ions, thereby improving the ionic conductivity of the material. However, the high flammability of carbonate materials makes lithium-ion batteries technically a huge safety hazard. Especially in the field of hybrid and pure electric vehicles that require high safety, large capacity and high discharge rate, safety is an important factor restricting the application of these materials. Therefore, both at home and abr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0569H01M10/0525
CPCH01M10/0525H01M10/0569H01M2300/0037Y02E60/10
Inventor 尤春琴甘朝伦王峰徐凯辰钱雨涛
Owner ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
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