Journal
IONICS
Volume 23, Issue 6, Pages 1391-1398Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-017-1981-5
Keywords
Zinc-cobalt oxysulfides; Battery-type electrode; Binder-free; Hydrothermal treatment
Funding
- National Natural Science Foundation of China [40802013]
- Key Projects in the National Science and Technology Pillar Program [2006BAD10B04]
- Fundamental Research Funds for the Central Universities [2011YXL058, 2652015092, 2652015007]
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Sea anemone-like zinc-cobalt (Zn-Co) oxysulfides grown on nickel foam were synthesized by a hydrothermal treatment for the first time as a battery-type electrode for hybrid supercapacitors. Such a binder-free sea anemone-like Zn-Co oxysulfide electrode displays improved electrochemical properties, which can be attributed to the unique sea anemone-like morphology and the partly replacement of oxygen with sulfur since sulfur possesses a lower electronegativity. As a result, the Zn-Co oxysulfide electrode exhibits a specific capacity of 645.5 C g(-1) (1 A g(-1)) which is much higher than 386.0 C g(-1) of Zn-Co oxide electrode at the same conditions. In addition, the Zn-Co oxysulfide electrode also demonstrates good cycling stability (76.1% capacity retention after 1000 cycles). According to these, the Zn-Co oxysulfide electrode is testified to be a promising faradaic electrode for energy storage.
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