Fabrication of Co3O4@Co–Ni sulfides core/shell nanowire arrays as binder-free electrode for electrochemical energy storage

Wei Hong, Jinqing Wang, Zhangpeng Li and Shengrong Yang

Energy, 2015, vol. 93, issue P1, 435-441

Abstract: The rational design and construction of efficient electrodes for applications in energy storage have been widely conducted. In this work, we have demonstrated a binder-free electrode composed of Co3O4@Co–Ni-sulfides core/shell nanowire arrays with tunable Ni/Co ratio for the high-performance pseudo-capacitors. This as-fabricated electrode can offer the desired structural features for the efficient usage of active materials. With the advantages of the well-ordered architecture, this hierarchical electrode shows a high specific capacitance of 1844 F g−1 (7.38 F cm−2) at a current density of 5 mA cm−2. Besides, an asymmetric supercapacitor based on this synthesized electrode can deliver a maximum energy density of 44.8 Wh kg−1 and a good cycling stability of 91% retention after 4000 cycles. Our results presented here demonstrate that this hierarchical electrode has potential usage in electrochemical energy storage.

Keywords: Cobalt oxide; Cobalt-nickel binary sulfides; Hierarchical nanostructures; Pseudo-capacitors (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:93:y:2015:i:p1:p:435-441

DOI: 10.1016/j.energy.2015.09.053

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