1. Vertically aligned ZnCo2O4 nanoplates on Ti3C2 for high-efficiency hybrid supercapacitors.
- Author
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Wang, Hao, Zhang, Yu, Guo, Enyan, Hu, Chengge, Lu, Qifang, Wei, Mingzhi, Ma, Jingyun, and Si, Conghui
- Subjects
ENERGY density ,ELECTROCHEMICAL electrodes ,STRUCTURAL stability ,POWER density ,SUPERCAPACITOR electrodes ,SUPERCAPACITORS - Abstract
Electrode materials exhibiting higher structural stability and electrochemical activity remain a priority in improving the electrochemical performance of supercapacitors (SCs). Herein, we report the design and synthesis of a novel nanoplate-on-nanosheet architecture with vertically aligned ZnCo
2 O4 (ZCO) porous nanoplates anchored on ultrathin delaminated-Ti3 C2 (d-TC) nanosheets as a high-performance electrode for electrochemical SCs. The unique robust nanoplate-on-nanosheet adhesion promises fast electron and ion transport, large electroactive surface area, and excellent structural stability. Importantly, benefiting from the features of such a configuration, the ZCO/d-TC-350 composite electrode displays a high specific capacity of 195.8 C g−1 at a current density of 1 A g−1 . Moreover, the constructed hybrid supercapacitor (HSC) consisting of ZCO/d-TC-350‖‖active carbon (AC) achieves a high energy density of 15.6 W h kg−1 at a power density of 551.1 W kg−1 and superior long-term stability with 89.5% capacitance retention after 4000 cycles. This work provides a promising strategy for the preparation of advanced MXene-based electrodes for electrochemical capacitors. [ABSTRACT FROM AUTHOR]- Published
- 2022
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