High-pseudocapacitance of porous and square NiO@NC nanosheets for high-performance lithium-ion batteries  

作　　者：Ze-Lin Cai Zi-Lin Peng Meng-Qi Wang Jia-Yan Wu Hao-Sen Fan Yu-Fei Zhang 

机构地区：[1]School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China [2]School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China

出　　处：《Rare Metals》2021年第6期1451-1458,共8页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.21676060);the Natural Science Foundation of Guangdong Province of China(No.2018A030313516);the Science and Technology Planning Project of Guangzhou(No.201804010449)。

摘　　要：Layered nickel oxides have been focused with intense research interests as high-performance lithium-ion batterie(LIB)anode.However,it is hard to obtain few layered nickel oxides material directly as it easily forms bulk material with the strong interaction between the interlayer.In this work,two-dimensional(2 D)nickel-based coordination polymers were successfully prepared according to aqueous phase copolymerization approach.And then uniform carbondoped NiO nanosheets were successfully obtained from facile solution assembly and post-thermal treatment.The detailed electrochemical testing shows that the uniform NiO nanocrystals encapsulated into porous N-doped carbon(NiO@NC)nanosheets present much higher rate capability with the discharge specific capacity of 782.7 mAh·g^(-1) at high current density of 2.0 A·g^(-1) than pure NiO(690 mAh·g^(-1)).It also shows long-term cycling performance with 91%retention after 50 cycles at 1.0 A·g^(-1).The high rate capability,cycling stability and the easy synthesis make NiO@NC nanosheets as a promising candidate for LIB anode and build up new way for the fabrication of metal oxides anode materials.

关 键 词：Anode Batteries SQUARE NiO@NC nanosheets PSEUDOCAPACITIVE 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]