In this work,we have prepared the hierarchically nanostructured core-shell NiCo layered double hydroxide(NiCo-LDH)nanosheets-and ZnFe2O4 nanocubes-decorated polyacrylonitrile(PAN)/pitch-based carbon nanofibers(PPCNs)webs(NiCo-LDH@PPCNs as cathode and ZnFe2O4@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 Ag-1,due to the increased electrical con-ductivity and lower interfacial charge transfer resistance(RCT)of～0.16 Ω.Further,the NiCo-LDH-decorated PP30CNs(NiCo-LDH@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 ZnFe2O4@PP30CNs as anode material also showed higher specific capacitance of 282 Fg-1 at 1 Ag-1 and good rate capability with capacitance retention of 56.73％at 10 A g-1.The as-fabricated asymmetric NiCo-LDH@PP30CNs//ZnFe2O4@PP30CNs hybrid super-capacitor device delivered a specific capacitance of～98 Fg-1 at 1 A g-1 and excellent capacitance retention of～88％after 5000 charge-discharge cycles.

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

Department of Organic Materials&Fiber Engineering,Jeonbuk National University,567 Baekje-daero,Deokjin-gu,Jeonju-si,Jeollabuk-do,54896,Republic of Korea;Department of BIN Convergency Technology,Jeonbuk National University,567 Baekje-daero,Deokjin-gu,Jeonju-si,Jeollabuk-do,54896,Republic of Korea;Department of Environmental Biology and Water Engineering,College of Urban Construction,Wuchang Shouyi University,Wuhan,430064,China;Korea Institute of Carbon Convergence Technology,Jeonju,54852,Republic of Korea

绿色能源与环境（英文）

[1]Jae-Gyoung Seong;Tae Hoon Ko;Danyun Lei;Woong-Ki Choi;Yun-Su Kuk;Min-Kang Seo;Byoung-Suhk Kim-.Engineered NiCo-LDH nanosheets-and ZnFe2O4 nanocubes-decorated carbon nanofiber bonded mats for high-rate asymmetric supercapacitors)[J].绿色能源与环境（英文）,2022(06):1228-1240

PPCNs,hydrothemal,PP30CNs

Engineered,NiCo,LDH,nanosheets,ZnFe2O4,nanocubes,decorated,carbon,bonded,mats,asymmetric,supercapacitors,In,this,have,prepared,hierarchically,nanostructured,core,shell,layered,double,hydroxide,polyacrylonitrile,PAN,pitch,nanofibers,webs,cathode,anode,materials,network,by,facile,scalable,method,Herein,cost,lower,softening,point,precursor,was,utilized,produce,enhanced,electrical,conductivity,obtained,content,electrode,delivered,higher,specific,capacitance,than,that,Ag,due,increased,interfacial,transfer,resistance,RCT,Further,showed,superior,ultra,retention,also,Fg,good,capability,fabricated,hybrid,device,excellent,after,discharge,cycles

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