首页|Black phosphorus quantum dots enabled photo-assisted supercapacitor with boosted volumetric charge storage capability

Black phosphorus quantum dots enabled photo-assisted supercapacitor with boosted volumetric charge storage capability

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Photo-assisted rechargeable energy storage devices are a promising strategy to achieve sustainable de-velopment by simultaneously integrating solar energy conversion and supercapacitor storage.Herein,we fabricated a light-sensitive macroporous film based on carbon nanotube(CNT),intercalated with Co2V2O7,and then modified by black phosphorus quantum dots(BPQD).Physico-chemical characterization and density functional theory are employed to investigate the improved photo-assisted charge storage capa-bility and the underlying mechanism.It is demonstrated that photo-generated carriers can be separated efficiently,and the formed abundant interfaces could modulate the electronic structure of the electrode,effectively improving the conductivity.Under visible light,the electrode displays an ultra-high capacity of 138.4 mA h g-1(197.9 mA h cm-3)at 1 A g-1.Besides,the CNT@Co2V2O7/BPQD supercapacitor shows a maximum energy density of 44.4 Wh kg-1(60.0 Wh L-1)at a power density of 800 W kg-1(960 W L-1)and excellent cyclic stability of 104.8％after 13,000 charge/discharge cycles.The above improvements are attributed to the reactivity and kinetics of electrochemically active components.This study reveals the synergistic effects of multi-interface on"light,photo-generated charge,and energy storage"and provides new possibilities in the controllable design of novel photo-assisted energy storage devices.

SupercapacitorPhoto-assisted chargingEnergy densityMacroporous filmPhotoinduced charge carriers

Yu Liu、Xiumei Chen、Baodong Mao、Yulong Ying、Longhua Li、Weidong Shi

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School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,China

School of Materials Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China

National Natural Science Foundation of ChinaIndustry Prospect and Key Core Technology(Competition Project)of Jiangsu ProvinceSino-German Cooperation Group Project

22225808BE2019093GZ1579

2024

10.1016/j.jmst.2023.12.036

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.191(24)