Affiliation:
1. School of Chemistry and Chemical Engineering Yangzhou University Yangzhou Jiangsu 225009 P. R. China
2. Institute of Advanced Materials and Flexible Electronics (IAMFE) School of Chemistry and Materials Science Nanjing University of Information Science and Technology Nanjing 210044 P. R. China
Abstract
AbstractThe effects of near surface or surface mechanisms on electrochemical performance (lower specific capacitance density) hinders the development of 3D printed micro supercapacitors (MSCs). The reasonable internal structural characteristics of printed electrodes and the appropriate intercalation material can effectively compensate for the effects of surface or near‐surface mechanisms. In this study, a layered structure is constructed inside an electrode using an ink with liquid‐crystal characteristics, and the pore structure and oxidation active sites of the layered electrode are optimized by controlling the amount of Co3O4‐quantum dots (Co3O4 QDs). The Co3O4 QDs are distributed in the pores of the electrode surface, and the insertion of Co3O4 QDs can effectively compensate for the limitations of surface or near‐surface mechanisms, thus effectively improving the pseudocapacitive characteristics of the 3D‐printed MSCs. The 3D printed MSC exhibits a high area capacitance (306.13 mF cm−2) and energy density (34.44 µWh cm−2 at a power density of 0.108 mW cm−2). Therefore, selecting the appropriate materials to construct printable electrode structures and effectively adjusting material ratios for efficient 3D printing are expected to provide feasible solutions for the construction of various high‐energy storage systems such as MSCs.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangsu Province
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)