Convenient room-temperature synthesis of sulfur and nitrogen co-doped NiCo-LDH coupled with CNTs on NiCo foam as battery-type electrode for high performance hybrid supercapacitor  

作　　者：Li Song Xiao-Hong Zhong Fang-Lin Wang Zhi-Hui Huang Zhe Hong Yun-Fang Gao Hai-Dong Wang Jian-Wei Ren Sheng-Jie Peng Lei Li 

机构地区：[1]College of Biological,Chemical Sciences and Engineering,Jiaxing University,Jiaxing 314001,China [2]College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China [3]College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [4]Research and Development Department,Jiangxi Ganfeng LiEnergy Technology Co.,Ltd.,Xinyu 338000,China [5]Department of Mechanical Engineering Science,University of Johannesburg,Auckland Park,Johannesburg 2092,South Africa

出　　处：《Rare Metals》2024年第9期4286-4301,共16页稀有金属（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21978111,22278175 and 22108094);Zhejiang Provincial Natural Science Foundation of China(Nos.LZ24B060001 and LY22E020016);Jiaxing Key Research Project(No.2022BZ10001);the“Innovation Jiaxing·Excellent Talent Support Plan”Top Talent for Innovation and Entrepreneurship。

摘　　要：The convenient synthesis of the composite electrode with high supercapacitance performance plays an important role in practical application but is challenging.Herein,the carbon nanotubes(CNTs)coupled with lowcrystalline sulfur and nitrogen co-doped Ni Co-LDH(denoted as SN-Ni Co-LDH)nanosheets array are grown on Ni Co foam(NCF)substrate by two convenient steps of metal induced self-assembly and corrosion engineering,which present the advantages of operating at roomtemperature and low preparation costs.Benefiting from the S–N co-doping and low-crystallinity of Ni Co-LDH,the prepared SN-Ni Co-LDH@CNTs@NCF electrode presents a topping charge capacity of 2470 C·g^(-1)(4.94 C·cm^(-2))at 5 m A·cm^(-2).Furthermore,the fabricated asymmetry supercapacitor(ASC)achieves an extraordinary energy density of 77 Wh·kg^(-1)(0.617 m Wh·cm^(-2))at a power density of 438 W·kg^(-1)(3.5 m W·cm^(-2))and outstanding stability(91%capacity retention after 5000 cycles at20 m A·cm^(-2)).Impressively,the structure evolution of Ni Co-LDH during the charge/discharge processes has been thoroughly elucidated by in-situ Raman spectra.Therefore,this work verifies a powerful strategy and practical value for preparing composite electrodes with high supercapacitance performance,and also provides guidance for the rational design of the smart electrodes.

关 键 词：SUPERCAPACITOR NiCo-LDH Carbon nanotubes Sulfur and nitrogen co-doped Convenient synthesis 

分 类 号：TM53[电气工程—电器] TB332[一般工业技术—材料科学与工程]