Bimetallic CoNiSe_(2)/C nanosphere anodes derived from Ni-Co-metal-organic framework precursor towards higher lithium storage capacity  

作　　者：Weifan Zhang Lei Wang Guochun Ding Yuejia Yang Guang Yang Jing Xu Ningning Xu Lingling Xie Qing Han Limin Zhu Xiaoyu Cao Jianmin Ma 

机构地区：[1]School of Chemistry and Chemical Engineering,Henan University of Technology,Zhengzhou 450001,China [2]School of Environmental Engineering,Henan University of Technology,Zhengzhou 450001,China [3]Key Laboratory of High Specific Energy Materials for Electrochemical Power Sources of Zhengzhou City,Henan University of Technology,Zhengzhou 450001,China [4]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,China

出　　处：《Chinese Chemical Letters》2023年第2期534-541,共8页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation, China (Nos. 52071132, 21773057 and U1904216);Zhongyuan Thousand People Plan-The Zhongyuan Youth Talent Support Program (in Science and Technology), China (No. ZYQR201810139);Innovative Funds Plan of Henan University of Technology, China (No. 2020ZKCJ04);Fundamental Research Funds for the Henan Provincial Colleges and Universities in Henan University of Technology, China (No. 2018RCJH01)。

摘　　要：Through uncomplicated carbonation process,a carbon-embedded CoNiSe_(2)/C nanosphere was synthesized from Ni-Co-MOF (metal-organic framework) precursor whose controllable structure and synergistic effect of bimetallic Ni/Co brought CoNiSe_(2)/C anodes with high specific surface area (172.79 m^(2)/g) and outstanding electrochemical performance.CoNiSe_(2)/C anodes obtained reversible discharge capacities of850.9 mAh/g at 0.1 A/g after cycling for 100 cycles.In addition,CoNiSe_(2)/C exhibits excellent cycle stability and reversibility in the rate test at a current density of 0.1–2.0 A/g.When the current density returns to 0.5 A/g for 150 cycles,its discharge ratio the capacity is 330.8 m Ah/g.Electrochemical impedance spectroscopy (EIS) tests suggested that CoNiSe_(2)/C anodes had a lower charge transfer impedance of 130.02Ωafter 30 cycles.In-situ X-ray diffraction (XRD) tests confirmed the alloying mechanism of CoNiSe_(2)/C which realized higher lithium storage capacity.This work affords substantial evidence for the extension of bimetallic selenides in secondary batteries,promoting the development of bimetallic selenides in anode materials for LIBs.

关 键 词：MOFs Bimetallic compound CoNiSe_(2)/C anode nanosphere Lithium-ion batteries Lithium storage performance 

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]