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Interconnected network‐like single crystalline bimetallic carbonate hydroxide nanowires for high performance hybrid supercapacitors
Author(s) -
Sivakumar Periyasamy,
Jana Milan,
Nakhanivej Puritut,
Jung Min Gyu,
Raj Chellam Justin,
Park Ho Seok
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5999
Subject(s) - supercapacitor , hydroxide , bimetallic strip , nanowire , capacitance , electrolyte , materials science , cobalt hydroxide , chemical engineering , electrode , nickel , electrochemistry , cobalt , carbonate , inorganic chemistry , nanotechnology , chemistry , metallurgy , engineering , metal
Summary The one‐dimensional (1D) nanoarchitectures are attractive toward energy storage electrode materials because of their large available surface area, a short and efficient pathway for ion/electron transport, structural stability, and highly exposed electrochemically active sites. Herein, we develop the bimetallic single crystalline nickel cobalt carbonate hydroxide (NiCoCO 3 (OH) 2 ) nanowires for the high capacitance electrode of hybrid supercapacitor (HSC). This unique NiCoCO 3 (OH) 2 nanowire electrode reveals a maximum specific capacitance value of 1948 F g −1 at 1 A g −1 with a high rate capacitance of 859 F g −1 even at 30 A g −1 , which is a considerably higher value than the monometallic nickel carbonate hydroxide (1159 F g −1 ) and cobalt carbonate hydroxide (859 F g −1 ), respectively. These results are attributed to the presence of abundant redox‐active sites of multivalent Ni and Co and an easy charge transport pathway of NiCoCO 3 (OH) 2 nanowire. The as‐designed HSC full cells, configuring NiCoCO 3 (OH) 2 nanowire and activated carbon as a positive and native electrodes, respectively, deliver energy and power densities of 56.56 W h kg −1 and 44.81 kW kg −1 . Moreover, the HSC cells exhibit prominent cycling stability of 91.4% for 12 000 charge‐discharge cycles in 6 M KOH aqueous electrolyte.