Engineered NiCo-LDH nanosheets- and ZnFe_(2)O_(4) nanocubes-decorated carbon nanofiber bonded mats for high-rate asymmetric supercapacitors  

作　　者：Jae-Gyoung Seong Tae Hoon Ko Danyun Lei Woong-Ki Choi Yun-Su Kuk Min-Kang Seo Byoung-Suhk Kim 

机构地区：[1]Department of Organic Materials&Fiber Engineering,Jeonbuk National University,567 Baekje-daero,Deokjin-gu,Jeonju-si,Jeollabuk-do,54896,Republic of Korea [2]Department of BIN Convergency Technology,Jeonbuk National University,567 Baekje-daero,Deokjin-gu,Jeonju-si,Jeollabuk-do,54896,Republic of Korea [3]Korea Institute of Carbon Convergence Technology,Jeonju,54852,Republic of Korea [4]Department of Environmental Biology and Water Engineering,College of Urban Construction,Wuchang Shouyi University,Wuhan,430064,China

出　　处：《Green Energy & Environment》2022年第6期1228-1240,共13页绿色能源与环境（英文版）

基　　金：supported by the National Research Foundation of Korea grant funded by the Korea government(MSIT)(No.2020R1A2C2012356);the National Research Foundation of Korea grant funded by the Korea government(MSIT)(2020R1I1A1A01073937).

摘　　要：In this work,we have prepared the hierarchically nanostructured core–shell NiCo layered double hydroxide(NiCo-LDH)nanosheets-and ZnFe_(2)O_(4) nanocubes-decorated polyacrylonitrile(PAN)/pitch-based carbon nanofibers(PPCNs)webs(NiCo-LDH@PPCNs as cathode and ZnFe_(2)O_(4)@PPCNs as anode materials)with the bonded network structure by a facile and scalable hydrothemal method.Herein,the low-cost pitch with lower softening point(~90℃)as co-precursor was utilized to produce the PAN/pitch-based carbon nanofibers(PPCNs)with enhanced electrical conductivity.The obtained PPCNs with pitch content of 30%(PP30CNs)electrode material delivered higher specific capacitance(~67 F g^(-1))than that(~48 F g^(-1))of the PAN-based carbon nanofibers(PCNs)at 1 A g^(-1),due to the increased electrical conductivity and lower interfacial charge transfer resistance(RCT)of~0.16 U.Further,the NiCo-LDH-decorated PP30CNs(NiCoLDH@PP30CNs)as cathode material showed superior specific capacitance of 1162 F g^(-1) at 1.0 A g^(-1) and ultra-high retention rate of 91.56%at 10 A g^(-1).The ZnFe_(2)O_(4)@PP30CNs as anode material also showed higher specific capacitance of 282 F g^(-1) at 1 A g^(-1) and good rate capability with capacitance retention of 56.73%at 10 A g^(-1).The as-fabricated asymmetric NiCo-LDH@PP30CNs//ZnFe_(2)O_(4)@PP30CNs hybrid supercapacitor device delivered a specific capacitance of~98 F g^(-1) at 1 A g^(-1) and excellent capacitance retention of~88%after 5000 charge–discharge cycles.

关 键 词：Carbon nanofiber Pitch Asymmetric Rate capability SUPERCAPACITOR 

分 类 号：TM53[电气工程—电器]