TY - JOUR
T1 - Co9S8-Ni3S2/CuMn2O4-NiMn2O4 and MnFe2O4-ZnFe2O4/graphene as binder-free cathode and anode materials for high energy density supercapacitors
AU - Gopi, Chandu V.V.Muralee
AU - Vinodh, Rajangam
AU - Sambasivam, Sangaraju
AU - Obaidat, Ihab M.
AU - Singh, Saurabh
AU - Kim, Hee Je
N1 - Funding Information:
This work was supported by BK 21 PLUS, Creative Human Resource Development Program for IT Convergence, Pusan National University , Busan, South Korea. Also, this work was supported by UAEU Program for Advanced Research ( UPAR ) under Grant no. 31S312 .
Funding Information:
This work was supported by BK 21 PLUS, Creative Human Resource Development Program for IT Convergence, Pusan National University, Busan, South Korea. Also, this work was supported by UAEU Program for Advanced Research (UPAR) under Grant no. 31S312.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - An essential route to improve the energy density of asymmetric supercapacitor (ASC) is to develop unique, smart and highly-efficient positive and negative current collectors with hierarchical combination of various electroactive materials. Herein, we developed a multicomponent integration of hierarchical Co9S8-Ni3S2 nanoparticles anchored on CuMn2O4-NiMn2O4 nanosheet arrays (Co-Ni-S NPs/Cu-Ni-Mn-O NSAs) and rhombus-like shaped MnFe2O4-ZnFe2O4 nanocrystals are grown on the graphene-ink nanosheets (Mn-Zn-Fe-O/G-ink), which were effectively applied as a superior binder-free cathode and anode electrodes for ASCs. The hierarchical Co-Ni-S NPs/Cu-Ni-Mn-O NSAs and Mn-Zn-Fe-O/G-ink electrode architectures show large surface area, high conductivity and provide rich active sites for redox reactions. As a result, the electrochemical properties of Co-Ni-S NPs/Cu-Ni-Mn-O NSAs and Mn-Zn-Fe-O/G-ink electrodes deliver that both have excellent specific capacities (263 and 149.44 mA h g−1 at 2 A g−1), superior rate capabilities (86.54% and 92.64% even at 20 A g−1) and remarkable cycling stabilities (97.39% and 94.83% over 5000 cycles), respectively. Furthermore, an asymmetric supercapacitor (ASC) assembled using the Co-Ni-S NPs/Cu-Ni-Mn-O NSAs as positive electrode and Mn-Zn-Fe-O/G-ink as negative electrode with an aqueous KOH electrolyte. The energy and power densities of the ASC are calculated based on the weight of the electroactive materials. As a result, the ASC delivers ultrahigh energy and power densities of 75.65 W h kg−1 and 6629.53 W kg−1 as well as achieve exceptional cycling stability of 96.89% retention with 98.26% of columbic efficiency over 5000 cycles. These attractive results of binder-free advanced current collectors with composites of various active materials and favorable architectures paves a path for the engineering of new class collectors for high-performance ASCs.
AB - An essential route to improve the energy density of asymmetric supercapacitor (ASC) is to develop unique, smart and highly-efficient positive and negative current collectors with hierarchical combination of various electroactive materials. Herein, we developed a multicomponent integration of hierarchical Co9S8-Ni3S2 nanoparticles anchored on CuMn2O4-NiMn2O4 nanosheet arrays (Co-Ni-S NPs/Cu-Ni-Mn-O NSAs) and rhombus-like shaped MnFe2O4-ZnFe2O4 nanocrystals are grown on the graphene-ink nanosheets (Mn-Zn-Fe-O/G-ink), which were effectively applied as a superior binder-free cathode and anode electrodes for ASCs. The hierarchical Co-Ni-S NPs/Cu-Ni-Mn-O NSAs and Mn-Zn-Fe-O/G-ink electrode architectures show large surface area, high conductivity and provide rich active sites for redox reactions. As a result, the electrochemical properties of Co-Ni-S NPs/Cu-Ni-Mn-O NSAs and Mn-Zn-Fe-O/G-ink electrodes deliver that both have excellent specific capacities (263 and 149.44 mA h g−1 at 2 A g−1), superior rate capabilities (86.54% and 92.64% even at 20 A g−1) and remarkable cycling stabilities (97.39% and 94.83% over 5000 cycles), respectively. Furthermore, an asymmetric supercapacitor (ASC) assembled using the Co-Ni-S NPs/Cu-Ni-Mn-O NSAs as positive electrode and Mn-Zn-Fe-O/G-ink as negative electrode with an aqueous KOH electrolyte. The energy and power densities of the ASC are calculated based on the weight of the electroactive materials. As a result, the ASC delivers ultrahigh energy and power densities of 75.65 W h kg−1 and 6629.53 W kg−1 as well as achieve exceptional cycling stability of 96.89% retention with 98.26% of columbic efficiency over 5000 cycles. These attractive results of binder-free advanced current collectors with composites of various active materials and favorable architectures paves a path for the engineering of new class collectors for high-performance ASCs.
KW - CoS-NiS nanoparticles
KW - CuMnO-NiMnO nanosheet arrays
KW - Energy density
KW - Graphene-ink
KW - MnFeO-ZnFeO
KW - Supercapacitor
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U2 - 10.1016/j.cej.2019.122640
DO - 10.1016/j.cej.2019.122640
M3 - Article
AN - SCOPUS:85071522318
SN - 1385-8947
VL - 381
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 122640
ER -