HIGH-VOLTAGE TERNARY POSITIVE ELECTRODE MATERIAL WITH CORE-SHELL STRUCTURE AND PREPARATION METHOD THEREFOR

Title:

HIGH-VOLTAGE TERNARY POSITIVE ELECTRODE MATERIAL WITH CORE-SHELL STRUCTURE AND PREPARATION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2023/130779

Kind Code:

A1

Abstract:

The present invention provides a high-voltage ternary positive electrode material with a core-shell structure and a preparation method therefor. A chemical formula of the high-voltage ternary positive electrode material is LixNiaMnbCocMdO2, wherein 1.03＜x≤1.3, 0.50≤a≤0.65, 0.30≤b≤0.45, 0＜c≤0.10, a+b+c＝1, and 0≤d≤0.025. The high-voltage ternary positive electrode material comprises an inner core and a shell layer. The inner core comprises a lithium nickel manganese cobalt oxide ternary material, the molar ratio of nickel, manganese, and cobalt being (0.65-0.80):(0.05-0.60):(0.02-0.15). The shell layer comprises a lithium nickel manganese oxide binary material, the molar ratio of nickel to manganese being (0.10-0.60):(0.60-0.90). M is a doping element derived from the inner core and/or the shell layer. The high-voltage ternary positive electrode material can stably work under a ultrahigh voltage of 4.7 V, and has a ultrahigh specific discharge capacity and an excellent rate capability.

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Inventors:

HU JIN (CN)
DONG MINGXIA (CN)
ZHANG XIN (CN)

Application Number:

PCT/CN2022/122136

Publication Date:

July 13, 2023

Filing Date:

September 28, 2022

Export Citation:

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Assignee:

BASF SHANSHAN BATTERY MAT CO LTD (CN)
UNIV CENTRAL SOUTH (CN)

International Classes:

H01M4/505; H01M4/525

Foreign References:

CN114361440A	2022-04-15
CN112271284A	2021-01-26
CN112018372A	2020-12-01
CN107546383A	2018-01-05
CN109273701A	2019-01-25
CN112514118A	2021-03-16
US20180013129A1	2018-01-11

Attorney, Agent or Firm:

CHANGSHA ZONEYOUNG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)

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