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- Title
Template sacrificial controlled synthesis of hierarchical nanoporous carbon@NiCo<sub>2</sub>S<sub>4</sub> microspheres for high-performance hybrid supercapacitors.
- Authors
Yuan, Kai; Gao, Teng-Jia; Yang, Yang; Luo, Wang; Li, Shun; Zhang, Chao-Yang; Xu, Jian-Xiong; Li, Na; Zhu, Yi-Rong
- Abstract
Binary transition metal sulfides are hotly investigated in advanced energy storage devices because of their ultra-high reversible capacity. Nevertheless, the unsatisfied rate capability and cycling stability still hinder their practical application. Herein, hierarchical nanoporous carbon@NiCo2S4 (HNCMs@NCS) composites with core–shell flower-like structures were prepared by in situ growing of NiCo2S4 nanosheets on HNCMs through a hydrothermal-assisted template sacrificial method. Benefiting from a synergistic effect between the NiCo2S4 shell with high specific capacity and the HNCMs with unique porous structure, the synthesized flower-like HNCMs@NCS composites exhibit extraordinary electrochemical performances, including a high capacity of 346.9 mAh·g−1 at 1 A·g−1, superb rate property with 86.4% initial capacity at 30 A·g−1 and predominant cycle stability with 81.2% capacity retention after 5000 cycles. Furthermore, the resulting HNCMs@NCS cathode was coupled with the chemical-activated HNCMs (AHNCMs) anode to construct a hybrid supercapacitor device. The as-fabricated device exhibits superior energy density (49.9 Wh·kg−1 at 802 W·kg−1) and ultra-high power density (24 kW·kg−1 at 29.5 Wh·kg−1). This fascinating result further demonstrates the tremendous prospect of the synthesized HNCMs@NCS composites as high-performance supercapacitor electrode materials.
- Publication
Rare Metals, 2023, Vol 42, Issue 8, p2643
- ISSN
1001-0521
- Publication type
Article
- DOI
10.1007/s12598-023-02263-7