超级电容器
材料科学
电容
功率密度
储能
纳米技术
电化学
电极
碳纳米管
化学工程
能量密度
功率(物理)
化学
工程物理
物理化学
工程类
物理
量子力学
作者
Yifeng Lin,Xiaoyu Chen,Chang Pu,Zhongli Liu,Guohe Ren,Junguang Tao
标识
DOI:10.1016/j.jallcom.2021.163503
摘要
Unique structured electrodes with abundant surface area is imperative for developing high-performance supercapacitors. Herein, hollow hierarchical Ni3S2 @Co9S8 ([email protected]) nanotubes are rationally designed by a one-pot strategy, which demonstrate a substantial high active area. Accordingly, [email protected] nanotubes have exhibited promising electrochemical energy storage characteristics with high areal specific capacitance (9.79 F cm−2 at 2 mA cm−2) and excellent cycling stability (80.8% retention after 10000 at 20 mA cm−2). Furthermore, the hybrid supercapacitor (HSC) is designed with the [email protected] and active carbon (AC) as positive and negative electrodes, respectively. Remarkably, the HSC achieves ultrahigh energy density of 0.63 mWh cm−2 at a power density of 1.66 mW cm−2 (and 0.37 mWh cm−2 at 21.76 mW cm−2). This work offers a simple and effective approach to fabricate low-cost transition metal sulfides with great prospects in practical energy storage applications.
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