Lithium ion secondary battery positive electrode material and preparation method thereof

Lithium ion secondary battery positive electrode material and preparation method thereof

The invention discloses a lithium ion secondary battery positive electrode material and a preparation method thereof. Doping of a lithium secondary battery positive electrode active substance is carried out by virtue of the synergistic effect among specific elements so as to realize simultaneous pro...

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Hauptverfasser: SHEN LANYAO, XU SHIGUO, ZHANG JIQUAN, WU BIN, LI MIAO, ZHOU HENGHUI, YANG XINHE
Format: Patent
Sprache:eng
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BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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creator SHEN LANYAO
XU SHIGUO
ZHANG JIQUAN
WU BIN
LI MIAO
ZHOU HENGHUI
YANG XINHE
description The invention discloses a lithium ion secondary battery positive electrode material and a preparation method thereof. Doping of a lithium secondary battery positive electrode active substance is carried out by virtue of the synergistic effect among specific elements so as to realize simultaneous protection for a lithium-oxygen layer and a transitional metal-oxygen layer in a lithium cobalt oxide layered structure. By virtue of the optimal design of a secondary sintering technology, gradient doping or wrapping of the specific elements can be realized, so that the structural stability of large-particle lithium cobalt oxide of the material in a circulating process, particularly under a high-voltage condition, is better protected, and more excellent electrochemical performance is obtained; therefore, the lithium ion secondary battery positive electrode material can simultaneously meet the requirements on a high-discharge-voltage platform, high capacity and good circulating performance.
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Doping of a lithium secondary battery positive electrode active substance is carried out by virtue of the synergistic effect among specific elements so as to realize simultaneous protection for a lithium-oxygen layer and a transitional metal-oxygen layer in a lithium cobalt oxide layered structure. By virtue of the optimal design of a secondary sintering technology, gradient doping or wrapping of the specific elements can be realized, so that the structural stability of large-particle lithium cobalt oxide of the material in a circulating process, particularly under a high-voltage condition, is better protected, and more excellent electrochemical performance is obtained; therefore, the lithium ion secondary battery positive electrode material can simultaneously meet the requirements on a high-discharge-voltage platform, high capacity and good circulating performance.</abstract><oa>free_for_read</oa></addata></record>
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subjects BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
title Lithium ion secondary battery positive electrode material and preparation method thereof
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