Template sacrificial controlled synthesis of hierarchical nanoporous carbon@NiCo_(2)S_(4)microspheres for high-performance hybrid supercapacitors  

作　　者：Kai Yuan Teng-Jia Gao Yang Yang Wang Luo Shun Li Chao-Yang Zhang Jian-Xiong Xu Na Li Yi-Rong Zhu 

机构地区：[1]Hunan Key Laboratory of Electrochemical Green Metallurgy Technology,College of Materials and Advanced Manufacturing,Hunan University of Technology,Zhuzhou 412007,China [2]Hunan Key Laboratory of Biomedical Nanomaterials and Devices,College of Life Sciences and Chemistry,Hunan University of Technology,Zhuzhou 412007,China [3]School of Metallurgy and Environment,Central South University,Changsha 410083,China

出　　处：《Rare Metals》2023年第8期2643-2657,共15页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.52174247);the Distinguish Young Scientists of Hunan province(No.2022JJ10024);"Hejian"Innovative Talent Project of Hunan Province(No.2022RC1088);the Natural Science Foundation of Hunan Province(Nos.2021JJ30212 and 2021JJ30216);the Scientific Research and Innovation Foundation of Hunan University of Technology(No.CX2209)。

摘　　要：Binary transition metal sulfides are hotly investigated in advanced energy storage devices because of their ultra-high reversible capacity.Nevertheless,the unsatisfied rate capability and cycling stability still hinder their practical application.Herein,hierarchical nanoporous carbon@NiCo_(2)S_(4)(HNCMs@NCS)composites with coreshell flower-like structures were prepared by in situ growing of NiCo_(2)S_(4) nanosheets on HNCMs through a hydro thermal-as sis ted template sacrificial method.Benefiting from a synergistic effect between the NiCo_(2)S_(4)shell with high specific capacity and the HNCMs with unique porous structure,the synthesized flower-like HNCMs@NCS composites exhibit extraordinary electrochemical performances,including a high capacity of 346.9 mAh·g^(-1)at 1 A·g^(-1),superb rate property with86.4%initial capacity at 30 A·g^(-1)and predominant cycle stability with 81.2%capacity retention after 5000 cycles.Furthermore,the resulting HNCMs@NCS cathode was coupled with the chemical-activated HNCMs(AHNCMs)anode to construct a hybrid supercapacitor device.The asfabricated device exhibits superior energy density(49.9 Wh·kg^(-1)at 802 W·kg^(-1))and ultra-high power density(24 kW·kg^(-1)at 29.5 Wh·kg^(-1)).This fascinating result further demonstrates the tremendous prospect of the synthesized HNCMs@NCS composites as high-performance supercapacitor electrode materials.

关 键 词：Hybrid supercapacitors(HSCs) NiCo_(2)S_(4) Hierarchical nanoporous carbon(HNC) Template sacrificial method 

分 类 号：TM53[电气工程—电器] TB383.1[一般工业技术—材料科学与工程]