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Lithium Ion Battery

A lithium-ion battery and separator technology, applied in the direction of batteries, battery electrodes, secondary batteries, etc., can solve problems that need to be improved, achieve the effects of improving electrochemical performance, improving overcharge safety, and overcoming poor oxidation resistance

Active Publication Date: 2021-08-06
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in the above-mentioned non-aqueous electrolyte. For example, in a high-voltage system, the cycle performance, storage performance and safety performance of the above-mentioned non-aqueous electrolyte need to be improved. Safety performance such as overcharge safety and hot box safety of ion batteries also needs to be improved

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0055] (1) Preparation of non-aqueous electrolyte

[0056] Mix compound A1, ethyl methyl carbonate (EMC), and ethylene carbonate (EC) in a weight ratio of 60:35:5 as a non-aqueous solvent, and then dissolve 1.0mol / L LiPF 6 As a lithium salt, 2% DTD is then added to configure a non-aqueous electrolyte.

[0057] (2) Preparation of positive pole piece

[0058] The cathode active material LiNi 0.8 co 0.1 mn 0.1 o 2 , the conductive agent acetylene black, and the binder polyvinylidene fluoride (PVDF) at a weight ratio of 94:3:3 are fully stirred and mixed in the N-methylpyrrolidone solvent system, and then coated on the current collector Al foil and dried. Cold pressing to obtain the positive electrode sheet.

[0059] (3) Preparation of negative electrode sheet

[0060] Negative electrode active material artificial graphite, conductive agent acetylene black, binder styrene-butadiene rubber, thickener sodium carboxymethyl cellulose in a weight ratio of 95:2:2:1 are fully stir...

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Abstract

The invention provides a lithium ion battery, which comprises a positive pole piece, a negative pole piece, a separator and a non-aqueous electrolyte. The positive pole piece contains Li 1+x Ni a co b Me (1‑a‑b) o 2‑c Y c , ‑0.1≤x≤0.2, 0.8≤a<1, 0

Description

technical field [0001] The invention relates to the field of batteries, in particular to a lithium ion battery. Background technique [0002] Lithium-ion batteries are widely used in electric vehicles and consumer electronics due to their advantages such as high energy density, high output power, long cycle life and low environmental pollution. The current demand for lithium-ion batteries is: high voltage, high power, long cycle life, long storage life and excellent safety performance. [0003] Lithium-ion batteries currently widely use a non-aqueous electrolyte system using lithium hexafluorophosphate as a conductive lithium salt and cyclic carbonate and / or chain carbonate as a solvent. However, there are still many deficiencies in the above-mentioned non-aqueous electrolyte. For example, in a high-voltage system, the cycle performance, storage performance and safety performance of the above-mentioned non-aqueous electrolyte need to be improved. Safety performances such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0569H01M10/0525
CPCH01M10/0525H01M10/0569H01M2300/0037H01M10/0568Y02E60/10H01M10/0567H01M4/525H01M4/1391H01M2300/0034H01M2220/20H01M2300/0022
Inventor 冯俊敏陈培培付成华梁成都
Owner CONTEMPORARY AMPEREX TECH CO
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