期刊
ELECTROCHIMICA ACTA
卷 399, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.139331
关键词
Hydrogen-ion storage; Heteroatomic doping; Iodine; Molybdenum trioxide
资金
- science and technology innovation Program of Hunan Province [2020RC1001]
- Fundamental Research Funds for the Central Universities of Central South University [2019zzts445]
- Hunan Provincial Science and Technology Plan Project, China [2017TP1001]
- Natural Science Foundation of Hunan Province [2019JJ50794, 2020JJ4681]
A novel rechargeable hydrogen ion supercapattery was assembled in this study, using iodine-absorbed N and P-doped carbon paper as the cathode electrode and molybdenum trioxide as the anode electrode, exhibiting superior rate capability and cycling stability.
Hydrogen ion battery is a promising energy storage device due to its advantages of non-pollution, excellent rate capability and feasibility at low temperature. Herein, we assemble a novel rechargeable hydrogen ion supercapattery with the iodine-absorbed carbon paper doped with N and P (I-2-NP-CP) as the cathode electrode and molybdenum trioxide as the anode electrode. Typically, the I-2-NP-CP electrode shows the superior rate capability from 1 A g(-1) (174.7 mAh g(-1), 483.8 F g(-1)) to 20 A g(-1) (111.1 mAh g(-1), 307.7 F g(-1)), mainly ascribed to the strong interaction between iodine and the NP-CP substrate. Furthermore, electrochemical measurement of the I-2Y -NP-CP@Nafion//MoO 3 supercapattery manifests that the electrodes exhibit excellent cycling stability, retaining 124.3 mAh g(-1) after 500 cycles at 15 A g(-1), accounting for 93.2 % of the initial capacity. Although some IO 3 - dissolves in the electrolyte due to the weak chemical interaction between IO3 (-) and NP-CP, and cannot be completely reduced to I- during discharge process, it can be improved by modification of electrode with Nafion resin to further better the cycling stability. The excellent electrochemical properties in this study show the possibility for the development of novel rechargeable hydrogen ion supercapattery system. (C) 2021 Elsevier Ltd. All rights reserved.
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