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Hierarchical Hollow Bimetal Oxide Microspheres Synthesized through a Recrystallization Mechanism for High‐Performance Lithium‐Ion Batteries
Author(s) -
Li Fanggang,
Zheng Maojun,
You Yuxiu,
Jiang Dongkai,
Yuan Hao,
Zhai Zhihao,
Zhang Wenlan,
Ma Li,
Shen Wenzhong
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202000781
Subject(s) - bimetal , materials science , oxide , microstructure , recrystallization (geology) , chemical engineering , dissolution , porosity , annealing (glass) , nanotechnology , fabrication , lithium (medication) , current density , lithium ion battery , nanocrystal , battery (electricity) , metallurgy , composite material , medicine , paleontology , power (physics) , alternative medicine , physics , pathology , quantum mechanics , engineering , biology , endocrinology
Bimetal oxide with its intricate nanostructure holds great potential for high‐performance electrode materials in lithium‐ion batteries (LIBs). Herein, a facile strategy for the fabrication of hierarchical hollow Co 3 O 4 /ZnCo 2 O 4 microspheres is developed, involving a simple solvothermal synthesis and subsequent thermal annealing in air. An aggregation‐dissolution‐in situ recrystallization structure evolution and growth mechanism is proposed. Benefiting from the unique hierarchical hollow structure with rational porosity, synergistic effect of bimetal components, and better electrical conductivity, the as‐synthesized Co 3 O 4 /ZnCo 2 O 4 hierarchical hollow microstructure shows outstanding lithium storage properties. As a result, a superior rate capability (842 mA h g −1 at a current density of 4 A g −1 ) and an excellent cycle life (754 mA h g −1 after 800 cycles at a current density of 2 A g −1 ) are obtained. The presented strategy could be applicable to the synthesis of mixed metal oxide hierarchical hollow structures with rational porosity for high‐performance LIBs.