High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets
2015; Elsevier BV; Volume: 174; Linguagem: Inglês
10.1016/j.electacta.2015.06.011
ISSN1873-3859
AutoresZhibin Wu, Xuli Pu, Xiaobo Ji, Yirong Zhu, Mingjun Jing, Qiyuan Chen, Feipeng Jiao,
Tópico(s)Advancements in Battery Materials
ResumoHigh-purity NiCo2S4 mesoporous nanosheets prepared through utilizing CS2 as novel sulfur source were fabricated as advanced electrode for electrochemical supercapacitors. Well-defined X-ray diffraction pattern, high specific surface areas and suitable pore size distribution (2∼6 nm) were observed for the as-obtained NiCo2S4 sample, demonstrating remarkable electrochemical performances resulting from the porous feature of NiCo2S4 nanosheets that increase the amount of electroactive sites and facilitate the electrolyte penetration. The as-assembled asymmetric supercapacitor (ASC) exhibits a high energy density of 25.5 Wh kg−1 at a power density of 334 W kg−1 and still remains an impressive energy density of 10.8 Wh kg−1 at a high power density of 8 kW kg−1. The outstanding performance of this ASC device will undoubtedly make the mesoporous NiCo2S4 nanosheets attractive for high-performance electrode materials.
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