Hierarchical porous NiCo2O4nanosheet arrays directly grown on carbon cloth with superior lithium storage performance.
Binary metal oxides have been explored as advanced candidates in lithium-ion battery (LIB) anodes due to their high specific capacity. Herein, the hierarchical structures of porous NiCo2O4nanosheets directly grown on a conductive carbon cloth substrate (3D NCO-PSA/CC) were obtained by a facile in situ synthetic strategy. When applied as a binder-free LIB anode, it exhibited satisfactory performance with a high discharge capacity (a first discharge capacity of 2090.8 mA h g-1and a stable capacity of 1687.6 mA h g-1at 500 mA g-1), superior rate capacity (discharge capacity of 375.5 mA h g-1at 6000 mA g-1) and excellent reversibility (coulombic efficiency of approximately 100%). The outstanding performances should be attributed to the 3D porous structures, nanosheets and good conductivity of NCO-PSA/CC that could not only ensure the rapid transport of Li+ions and electrons but also remit the huge volume change during lithiation/delithiation processes. Undoubtedly, the present facile and effective strategy can be extended to other binary metal-oxide materials for use as high-performance energy storage and conversion devices.
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China. fuhg@vip.sina.com wanglei0525@126.com.
Li
L
Zhao
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China. fuhg@vip.sina.com wanglei0525@126.com.
Lei
L
Wang
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China. fuhg@vip.sina.com wanglei0525@126.com.
Peng
P
Yu
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China. fuhg@vip.sina.com wanglei0525@126.com.
Chungui
C
Tian
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China. fuhg@vip.sina.com wanglei0525@126.com.
He
H
Feng
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China. fuhg@vip.sina.com wanglei0525@126.com.
Zhongwei
Z
Diao
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China. fuhg@vip.sina.com wanglei0525@126.com and National Center for International Research on Catalytic Technology, Harbin 150080, China.
Honggang
http://orcid.org/0000-0002-5800-451X
H
Fu