Preparation method of positive electrode material for lithium ion battery containing metaphosphate

A lithium metaphosphate and ion battery technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of difficult control of material uniformity, limited performance of positive electrode materials, capacity decay, etc., to improve cycle performance and safety Performance, solution to uneven response, and the effect of inhibiting structural decay
CN110931799BActive Publication Date: 2020-06-26SOUNDON NEW ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUNDON NEW ENERGY TECH CO LTD
Publication Date
2020-06-26

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Abstract

The invention provides a preparation method of a metaphosphate-containing lithium ion battery positive electrode material. The preparation method of the metaphosphate-containing lithium ion battery positive electrode material comprises the following steps: mixing a lithium-containing oxide with dihydric phosphate, and calcining in an oxidizing atmosphere to obtain the lithium ion battery positiveelectrode material, wherein the general formula of the lithium-containing oxide is Li Ni Co < c > Mn < d > X < 1-b-c-d > O < 2 >, and X comprises one or more of Al, Mg and Zr. The preparation method of the metaphosphate-containing lithium ion battery positive electrode material provided by the invention is good in coating effect, few in coating impurities and simple in preparation method, and the lithium ion battery prepared from the metaphosphate-containing lithium ion battery positive electrode material is good in cycle performance and safety.
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Description

technical field

[0001] The invention relates to the field of lithium ion batteries, in particular to a method for preparing a positive electrode material of a lithium ion battery containing metaphosphate. Background technique

[0002] With the rapid development of new energy vehicles, more and more electric vehicles have begun to enter the lives of ordinary consumers. Range and service life have been major concerns. As the cruising range of electric vehicles continues to catch up with fuel vehicles, the accidents of vehicle fires and explosions remind people that more and more attention should be paid to the safety of vehicles.

[0003] As the main part of the battery, the structural instability of the ternary cathode material is an important aspect affecting the performance of the battery. The surface structure of the ternary material is prone to excessive delithiation, which makes the layered structure of the material change to a spinel structure and an inert rock salt p...

Claims

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