Hierarchically Hybrid Porous Co3O4@NiMoO4/CoMoO4 Heterostructures for High-Performance Electrochemical Energy Storage

• DOI: 10.1021/acsami.1c23129
• Publication Date: 2022-02-03T14:41:54Z
• Authors: Yan Wang; Siming Yu; Ce-yu Deng; Hua-liang Wei; Jian-hao Zhou; Ze-Xiang Chen; Huan Yang; Ming-Jin Liu; Bing-Ni Gu; Chia-Chen Chung; Hui-fang Lv; Zhi-yu Zhou; Yu-Lun Chueh
• Keywords: 02 engineering and technology; 0210 nano-technology

Hierarchical, ultrathin, and porous NiMoO4@CoMoO4 on Co3O4 hollow bones were successfully designed synthesized by a hydrothermal route from the Co-precursor, followed KOH (potassium hydroxide) activation process. The hydrothermally nanowires act as scaffold for anchoring units but also show more compatibility with NiMoO4, leading to high conductivity in heterojunction. intriguing morphological features endow hierarchical Co3O4@NiMoO4@CoMoO4 better electrochemical performance where capacity of heterojunction being 272 mA·h·g-1 at 1 A·g-1 can be achieved superior retention 84.5% over 1000 cycles. enhanced utilization single/few shell layers core make it easy accept extra electrons, enhancing adsorption OH- surface, which contribute capacity. In our work, an asymmetric supercapacitor utilizing optimized activated carbon (AC) electrode materials was assembled, namely, Co3O4@NiMoO4@CoMoO4//AC device, yielding maximum energy density 53.9 W·h·kg-1 W·kg-1. It retain 25.92 even 8100 W·kg-1, revealing its potential viability applications. good power densities are ascribed feature robust architecture recreated abundant mesopores composite, assure improved diffusion electron transport. work demonstrated here holds great promise synthesizing other M3O4@MMoO4@MMoO4 (M = Fe, Ni, Sn, etc).