作者: Zhang, YM (Zhang, Yuming); Cao, JM (Cao, Junming); Yuan, ZY (Yuan, Zeyu); Zhao, LJ (Zhao, Lianjia); Wang, LL (Wang, Lili); Han, W (Han, Wei)

来源出版物: JOURNAL OF COLLOID AND INTERFACE SCIENCE 卷: 599 页: 109-118 DOI: 10.1016/j.jcis.2021.04.089 出版年: OCT 2021

摘要: MXenes with unique 2D open structure, large surface-area-to-volume ratios, high pseudo-capacitance, and conductivity are attractive for advanced supercapacitor electrodes. However, the restacking issue of MXenes hinders ion accessibility, resulting in the reduction of volume performance, mass load, and speed capability. To address these issues, a facile hydrothermal synthesis strategy is proposed to fabricate Co3O4 nanoparticles-MXene (Co-MXene) composite by the self-assembly process. Co3O4 nanoparticles, introduced in the MXene matrix, effectively prevent self-restacking and shorten ion/electron transport paths. Consequently, the obtained Co-MXene electrode delivers the high-performance of 1081F g(-1) at a current density of 0.5 A g(-1), surpassing the pristine MXene electrode (89F g(-1) at 0.5 A g(-1)). Being assembled into asymmetric supercapacitors (ASC), a high energy density of 26.06 Wh kg(-1) at 700 W kg(-1) was realized. After 8000 cycles, the ASC device maintains 83% of initial specific capacitance at 2 A g(-1). This work highlights a simple and efficient method for developing high-performance MXene-based electrodes for supercapacitors. (C) 2021 Elsevier Inc. All rights reserved.

入藏号: WOS:000659391600011

PubMed ID: 33933785

ISSN: 0021-9797

eISSN: 1095-7103

Full Text: https://www.sciencedirect.com/science/article/pii/S0021979721005993?via%3Dihub