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Mn Cluster-Embedded N/F Co-Doped Carbon toward Mild Aqueous Supercapacitors

Authors :
Chen Zheng
Xu Han
Fangfang Sun
Yue Zhang
Zihang Huang
Tianyi Ma
Source :
Materials, Vol 17, Iss 6, p 1417 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

Aqueous supercapacitors have occupied a significant position among various types of stationary energy storage equipment, while their widespread application is hindered by the relatively low energy density. Herein, N/F co-doped carbon materials activated by manganese clusters (NCM) are constructed by the straightforward experimental routine. Benefiting from the elevated conductivity structure at the microscopic level, the optimized NCM-0.5 electrodes exhibited a remarkable specific capacitance of 653 F g−1 at 0.4 A g−1 and exceptional cycling stability (97.39% capacity retention even after 40,000 cycles at the scanning rate of 100 mV s−1) in a neutral 5 M LiCl electrolyte. Moreover, we assembled an asymmetric device pairing with a VOx anode (NCM-0.5//VOx), which delivered a durable life span of 95% capacity retention over 30,000 cycles and an impressive energy density of 77.9 Wh kg−1. This study provides inspiration for transition metal element doping engineering in high-energy storage equipment.

Details

Language :
English
ISSN :
19961944
Volume :
17
Issue :
6
Database :
Directory of Open Access Journals
Journal :
Materials
Publication Type :
Academic Journal
Accession number :
edsdoj.09b33c56272c4178946e6fa730f79d81
Document Type :
article
Full Text :
https://doi.org/10.3390/ma17061417