@article{YANG2022, 
author = {Weiyi YANG and Jian WANG and Shuang GAO and Haoyu ZHANG and Hongyang WANG and Qi LI},
title = {Photo-assisted charging of carbon fiber paper-supported CeO2/MnO2 heterojunction and its long-lasting capacitance enhancement in dark},
year = {2022},
journal = {Journal of Advanced Ceramics},
volume = {11},
number = {11},
pages = {1735-1750},
keywords = {supercapacitors, carbon fiber paper-supported CeO2/MnO2 heterojunction (CeO2/MnO2–CFP), photo-assisted charging, long-lasting effect in dark, slow release of stored electrons},
url = {https://www.sciopen.com/article/10.1007/s40145-022-0644-9},
doi = {10.1007/s40145-022-0644-9},
abstract = {It is important to develop green and sustainable approaches to enhance electrochemical charge storage efficiencies. Herein, a two-step in-situ growth process was developed to fabricate carbon fiber paper-supported CeO2/MnO2 composite (CeO2/MnO2–CFP) as a binder-free photoelectrode for the photo-assisted electrochemical charge storage. The formation of CeO2/MnO2 type II heterojunction largely enhanced the separation efficiency of photo-generated charge carriers, resulting in a substantially enhanced photo-assisted charging capability of ~20%. Furthermore, it retained a large part of its photo-enhanced capacitance (~56%) in dark even after the illumination was off for 12 h, which could be attributed to its slow release of stored photo-generated electrons from its specific band structure to avoid their reaction with O2 in dark. This study proposed the design principles for supercapacitors with both the photo-assisted charging capability and its long-lasting retainment in dark, which may be readily applied to other pseudocapacitive materials to better utilize solar energy.}
}