Affiliation:
1. Condense matter of physics College of Science Northeastern University Shenyang 110004 China
Abstract
AbstractLarge‐capacity energy storage devices are attracting widespread research attention. However, the decreased capacity of these devices due to cold weather is a huge obstacle for their practical use. In this study, an electrochemical self‐adaptive reconstructed CuxS/Cu(OH)2‐based symmetric energy storage device is proposed. This device provides a satisfactorily enhanced photothermal capacity under solar irradiation. After electrochemical reconstruction treatment, the morphological structure is rearranged and the CuxS component is partially converted to electrochemically active Cu(OH)2 with the introduction of a large number of active sites. The resulting CuxS/Cu(OH)2 electrode provides a significant capacitance of 115.2 F cm−2 at 5 mA cm−2. More importantly, its wide working potential range and superior photo‐to‐thermal conversion ability endow CuxS/Cu(OH)2 with superb performance as full‐purpose photothermally enhanced capacitance electrodes. Under solar irradiation, the surface temperature of CuxS/Cu(OH)2 is elevated by 76.6 °C in only 30 s, and the capacitance is boosted to 230.4% of the original capacitance at a low temperature. Furthermore, the assembled symmetric energy storage device also delivers a photothermal capacitance enhancement of 200.3% under 15 min solar irradiation.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry