Journal
JOURNAL OF ENERGY STORAGE
Volume 41, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2021.102838
Keywords
Electrode materials; Composite materials; Microstructure; Supercapacitor
Categories
Funding
- NSFC [51861004, 52071092]
- Guangxi Natural Science Foundation [2019GXNSF DA245023, 2019GXNSFGA245005, 2020GXNSFGA297004, 2020ZYZX 1017]
- State Key Laboratory of Advanced Technology forMaterials Synthesis and Processing (Wuhan University of Technology) [2021KF24]
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This study successfully prepared three-dimensional flower-like ZnCo2S4@PPy composite material with remarkable electrochemical performance for potential use as supercapacitor electrode material. The unique flower-like core-shell structure contributed to the excellent performance of ZnCo2S4@PPy, making it a promising electrode material for future energy-storage devices.
Confinement transition metal compounds with conducting polymer is an effectively to inhibit the volume change during the Faradic reaction. In this work, three-dimensional flower-like polypyrrole-wrapped ZnCo2S4 (ZnCo2S4@PPy) core-shell nanoclusters were successfully prepared by two-step hydrothermal and electrochemical deposition methods. The obtained ZnCo2S4@PPy composite exhibited remarkable electrochemical performance corresponding to a specific capacitance of 1486 F g(-1) at 1 A g(-1), which suggested its potential use as a supercapacitor electrode material. Furthermore, the asymmetric supercapacitor containing a ZnCo2S4@PPy positive electrode demonstrated a high specific energy of 33.78 Wh kg(-1) at 800.05 W kg(-1) and relatively long cycle life (90% capacitance retention after 5000 cycles). The excellent electrochemical performance of ZnCo2S4@PPy can be attributed to the synergistic effect of its main components and unique flower-like core-shell structure. The results reveal that the ZnCo2S4@PPy core-shell nanocluster array is a promising electrode material for future energy-storage devices.
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