期刊
JOURNAL OF POWER SOURCES
卷 336, 期 -, 页码 35-39出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.10.053
关键词
Aqueous sodium ion batteries; Electrode materials; Self-discharge
资金
- Outstanding Youth Foundation of Hunan Provincial Education Department [15B190]
- Scientific research start-up funding of Jishou university [jsdxrcyjkyxm201407]
- National Natural Science Foundation of China [51662010, 51262008, 51472107, 51364009, 51672104]
- Natural Science Foundation of Hunan Province, China [12JJ2005, 14JJ4048, 16JJ6121]
- Aid program (Environment and Energy Materials and deep processing of mineral resources in Wuling Mountain) for Science and Technology Innovative Research Team in Higher Educational Instituions of Hunan Province
There is a broad application prospect for smart grid about aqueous rechargeable sodium-ion battery. In order to improve its electrochemical performance, a hybrid cationic aqueous-based rechargeable battery system based on the nanostructural Na0.44MnO2 and metallic zinc foil as the positive and negative electrodes respectively is built up. Nano rod-like Na0.44MnO2 is synthesized by sol-gel method followed by calcination at 850 degrees C for 9 h, and various characterization techniques including the X-ray diffraction (XRD) and scanning electron microscopy (SEM) are used to investigate the structure and morphology of the as-prepared material. The cyclic voltammetry, galvanostatic charge-discharge and self-discharge measurements are performed at the same time. The results show that the battery delivers a very high initial discharge capacity of 186.2 mAh g(-1) at 0.2 C-rate in the range of 0.5-2.0 V, and it exhibits a discharge capacity of 113.3 mAh g(-1) at high current density of 4 C-rate, indicative of excellent rate capability. (C) 2016 Elsevier B.V. All rights reserved.
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