超级电容器
电容
材料科学
碳纤维
功率密度
纳米技术
电极
光电子学
化学工程
复合材料
功率(物理)
化学
复合数
物理
工程类
量子力学
物理化学
作者
Zhenbin Tang,Juguo Dai,Wenkang Wei,Zhi Bin Gao,Zhixuan Liang,Chenzhi Wu,Birong Zeng,Yiting Xu,Guorong Chen,Weiang Luo,Conghui Yuan,Lizong Dai
标识
DOI:10.1002/advs.202201685
摘要
Stimuli-responsive supercapacitors have attracted broad interest in constructing self-powered smart devices. However, due to the demand for high cyclic stability, supercapacitors usually utilize stable or inert electrode materials, which are difficult to exhibit dynamic or stimuli-responsive behavior. Herein, this issue is addressed by designing a MoS2 @carbon core-shell structure with ultrathin MoS2 nanosheets incorporated in the carbon matrix. In the three-electrode system, MoS2 @carbon delivers a specific capacitance of 1302 F g-1 at a current density of 1.0 A g-1 and shows a 90% capacitance retention after 10 000 charging-discharging cycles. The MoS2 @carbon-based asymmetric supercapacitor displays an energy density of 75.1 Wh kg-1 at the power density of 900 W kg-1 . Because the photo-generated electrons can efficiently migrate from MoS2 nanosheets to the carbon matrix, the assembled photo-responsive supercapacitor can answer the stimulation of ultraviolet-visible-near infrared illumination by increasing the capacitance. Particularly, under the stimulation of UV light (365 nm, 0.08 W cm-2 ), the device exhibits a ≈4.50% (≈13.9 F g-1 ) increase in capacitance after each charging-discharging cycle. The study provides a guideline for designing multi-functional supercapacitors that serve as both the energy supplier and the photo-detector.
科研通智能强力驱动
Strongly Powered by AbleSci AI