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A lithium ion battery electrolyte and a lithium ion battery containing the electrolyte

A lithium ion battery and electrolyte technology, applied in the field of lithium ion battery and lithium ion battery electrolyte, can solve the problems of poor cycle life and safety of secondary batteries, capacity attenuation, etc. The effect of oxygen evolution reaction

Active Publication Date: 2022-02-08
SHANSHAN ADVANCED MATERIALS QUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention effectively solves the problem of poor cycle life and safety of lithium-ion secondary batteries and capacity fading under high voltage

Method used

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  • A lithium ion battery electrolyte and a lithium ion battery containing the electrolyte
  • A lithium ion battery electrolyte and a lithium ion battery containing the electrolyte
  • A lithium ion battery electrolyte and a lithium ion battery containing the electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Electrolyte preparation:

[0049]In a glove box filled with argon (oxygen content ≤ 1ppm, water content ≤ 1ppm), ethylene carbonate (EC), diethyl carbonate (DEC), and ethyl methyl carbonate (EMC) were mixed at a ratio of 1:1:1. The volume ratio is mixed evenly and stirred continuously to obtain a mixed solution, and lithium salt LiPF is added to the mixed solution 6 Dissolved to prepare LiPF containing 6 solution, followed by LiPF-containing 6 LiBOB and compound 1 were added into the solution, stirred to make it completely dissolved, and the electrolyte solution of Example 1 was obtained. Among them, lithium salt LiPF 6 The mass percentage in the electrolyte is 12.5%, the mass percentage of compound 1 in the electrolyte is 1%, and the mass percentage of LiBOB in the electrolyte is 1%. The electrolyte formulation is shown in Table 1.

Embodiment 2～16

[0051] Examples 2-16 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 electrolyte, which includes an organic solvent, an electrolyte lithium salt and an additive. According to the mass percentage in the lithium-ion battery electrolyte, the additive is composed of: aryl sulfur-containing ester compound 0.1 ‑5%, boron lithium salt 0.2‑5%. The invention also discloses a lithium ion battery comprising a positive pole, a negative pole, a separator and the lithium ion battery electrolyte. The invention effectively solves the problems of poor cycle life and safety of the lithium ion secondary battery and capacity fading under high voltage.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-ion battery electrolyte and a lithium-ion battery containing the electrolyte. Background technique [0002] Facing the increasingly prominent energy crisis and environmental pollution, lithium-ion batteries, as a new type of high-energy green energy storage device, are widely used in important industrial fields such as portable electronic devices, electric vehicles, and large-scale energy storage. Energy density and cost reduction. The cathode material is an important part of the lithium-ion battery, and its cost accounts for about 30% to 40% of the battery cost. At present, the specific energy of the entire battery is mainly limited by the specific capacity of the cathode material. Therefore, it is urgent to develop high specific energy, low-cost , long-life and safe new cathode material. High-nickel ternary material is a promising material, which has the advantage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0567H01M10/0525H01M2300/0025Y02E60/10
Inventor 王建斌杨艳茹黄慧聪朱学全郭力
Owner SHANSHAN ADVANCED MATERIALS QUZHOU CO LTD
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