Lithium ion battery non-aqueous electrolyte containing cyano cyclic unsaturated hydrocarbon compound and lithium ion battery

A lithium-ion battery, non-aqueous electrolyte technology, applied in the field of lithium-ion battery non-aqueous electrolyte and lithium-ion batteries, can solve the problems of interface film instability, impedance, gas production and voltage drop increase, and achieve improved cycle performance And discharge performance, increase life and stability, improve the effect of storage capacity

Pending Publication Date: 2021-12-28
SHANSHAN ADVANCED MATERIALS QUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the F-generation additives have different action mechanisms at different temperatures, voltages, and positive and negative electrode interfaces. In the perfluorinated system, the interface film between the positive and negative electrodes/el

Method used

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  • Lithium ion battery non-aqueous electrolyte containing cyano cyclic unsaturated hydrocarbon compound and lithium ion battery
  • Lithium ion battery non-aqueous electrolyte containing cyano cyclic unsaturated hydrocarbon compound and lithium ion battery
  • Lithium ion battery non-aqueous electrolyte containing cyano cyclic unsaturated hydrocarbon compound and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]The non-aqueous electrolyte solution for lithium-ion batteries was prepared as follows: in a glove box, ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC) and ethyl methyl carbonate (EMC) were mixed according to mass Mix at a ratio of 25:5:50:20 to obtain a mixed solvent, and then add LiPF to the mixed solvent 6 , LiDFOB, LiBF 4 The mixed lithium salt of composition (mass ratio is LiPF 6 :LiDFOB:LiBF 4 =0.95:0.0375:0.0125) to prepare an electrolyte with a mixed lithium salt concentration of 1.3M. After that, 0.5% vinylene carbonate (VC), 5% fluoroethylene carbonate (FEC), 4% 1,3-propane sultone (PS) and 1% of the compound (1) was stirred evenly to obtain the non-aqueous electrolyte solution for the lithium ion battery of Example 1.

Embodiment 2-12

[0036] Examples 2-12 are also specific examples of electrolyte preparation. Except for the parameters in Table 1, other parameters and preparation methods are the same as in Example 1. The electrolyte formulation is shown in Table 1.

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PUM

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Abstract

The invention discloses a lithium ion battery non-aqueous electrolyte containing a cyano cyclic unsaturated hydrocarbon compound. The lithium ion battery non-aqueous electrolyte comprises a lithium salt, an organic solvent and an additive, and the additive comprises a functional additive and the cyano cyclic unsaturated hydrocarbon compound with a specific structure. The electrolyte formula is optimized, the additive, the mixed lithium salt and the mixed solvent which are uniquely combined are adopted, and all the components have a synergistic effect, so that the cycle performance and the discharge performance of the lithium ion battery can be effectively improved.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a lithium-ion battery non-aqueous electrolyte containing a cyano group-containing cyclic unsaturated hydrocarbon compound and the lithium-ion battery. Background technique [0002] In recent years, the development of lithium-ion batteries has received widespread attention, and it has developed rapidly in the field of mobile phone digital, electric vehicles, electric bicycles, electric tools, and energy storage. Compared with other batteries, lithium-ion batteries have the advantages of light weight, small volume, high energy density, and long cycle life. At present, digital products such as smart phones and tablet computers have higher and higher requirements for energy density, making commercial lithium-ion batteries It is difficult for ion batteries to meet the requirements. Using high-energy-density materials as the positive electrode of the battery is the most effective way to increa...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0567H01M10/0525H01M2300/0025Y02E60/10
Inventor 吴杰钟子坊张晓宇
Owner SHANSHAN ADVANCED MATERIALS QUZHOU CO LTD
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