Hierarchical mesoporous Ni-P@MnO2 composite for high performance supercapacitors

• Published in: Materials letters 2017-01, Vol.187, p.144-147
• Main Authors: Li, Xudong, Ding, Rui, Shi, Wei, Xu, Qilei, Wang, Luo, Jiang, Haxia, Yang, Zeng, Liu, Enhui
• Format: Article
• Language: English
• Subjects: Composite materials; Energy storage and conversion; Ni-P@MnO2; Pseudocapacitive; Supercapacitors
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2016.10.021

Hierarchical mesoporous Ni-P@MnO2 composite has been synthesized by solvothermal fabrication of Ni-P and subsequent chemical deposition of MnO2. Owing to the synergistic effect between Ni-P and MnO2, the Ni-P@MnO2 composite exhibits a superior specific capacitance and rate capability (1130Fg−1 at 1Ag−1, 352Fg−1 at 16Ag−1) compared with the bare Ni-P materials. Furthermore, the AC//Ni-P@MnO2 asymmetric capacitor outdoes the AC//Ni-P asymmetric capacitor, exhibiting high energy/power densties of 10.9Whkg−1/5.6kWkg−1 with excellent cycling behavior (no decay after 10,000 cycles at 2Ag−1). The high performance makes the hierarchical mesoporous Ni-P@MnO2 composite promising electrode materials for supercapacitors. The AC//Ni-P@MnO2 asymmetric capacitor shows high energy and power densities together with excellent cycle life. [Display omitted] •Hierarchical mesoporous Ni-P@MnO2 composite was constructed.•The Ni-P@MnO2 composite exhibits superior pseudocapacitive behavior than bare Ni-P.•The performance of AC//Ni-P@MnO2 capacitor outdoes the AC//Ni-P capacitor.•The enhanced performance is due to the synergistic effect between Ni-P and MnO2.