Deng Hangchun, Huang Jie, Hu Zhiyong, Chen Xiangfei, Huang Dejuan, Jin Tianxiang
Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, School of Chemistry, Biology, and Materials Science, East China University, Nanchang, Jiangxi 330013, China.
ACS Omega. 2021 Mar 29;6(14):9426-9432. doi: 10.1021/acsomega.0c05953. eCollection 2021 Apr 13.
A three-dimensionally interconnected molybdenum trioxide (MoO)/polypyrrole (PPy)/reduced graphene oxide (rGO) composite was synthesized via an eco-friendly three-step method. The as-obtained electrode shows a high specific capacity of 412.3 F g at a current density of 0.5 A g and a good cycling stability (85.1% of the initial specific capacitance after 6000 cycles at 2 A g is retained), and these excellent electrochemical performances can be attributed to the unique structure, remarkable electrical conductivity, and the synergetic effects between MoO, PPy, and rGO. Furthermore, a symmetric supercapacitor based on a MoO/PPy/rGO electrode was assembled to investigate the practical application performance of this material. The results demonstrate a high energy density of 19.8 W h kg at a power density of 301 W kg. These findings shine a light on the rational design of electrode materials with multicomponents for high-performance supercapacitors.
通过一种环保的三步法合成了一种三维互连的三氧化钼（MoO）/聚吡咯（PPy）/还原氧化石墨烯（rGO）复合材料。所制备的电极在电流密度为0.5 A g时表现出412.3 F g的高比容量和良好的循环稳定性（在2 A g下6000次循环后仍保留初始比电容的85.1%），这些优异的电化学性能可归因于独特的结构、显著的电导率以及MoO、PPy和rGO之间的协同效应。此外，组装了基于MoO/PPy/rGO电极的对称超级电容器以研究该材料的实际应用性能。结果表明，在功率密度为301 W kg时，能量密度高达19.8 W h kg。这些发现为高性能超级电容器多组分电极材料的合理设计提供了思路。
