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Study on the performance of MnO 2 -MoO 3 composite as lithium-ion battery anode using spent Zn-Mn batteries as manganese source
Journal of Solid State Electrochemistry ( IF 2.5 ) Pub Date : 2020-01-14 , DOI: 10.1007/s10008-020-04496-3
Ningsheng Zhang , Guanghui Guo , Bowen He , Jiaxin Zhu , Jie Wu , Jianghua Qiu

The recycling of Zn-Mn batteries was linked with the synthesis of MnO2-MoO3 composite in this paper. An intermediate product of MnSO4 was recycled from spent Zn-Mn batteries by hydrometallurgy recycling technology, and it was selected as manganese source to synthesize MnO2-MoO3 composite via a facile one-step hydrothermal method. The composition, morphology, and valence state of the final product MnO2-MoO3 are characterized by X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. As anode for lithium-ion batteries, the obtained composite of MnO2-MoO3 on copper foil presents outstanding electrochemical performance. The composite attains an initial specific capacity of 2333.1 mAh g−1 and stays 908.8 mAh g−1 after 50 cycles at a current rate of 100 mA g−1 in the voltage range of 0.01–3.0 V, much higher than that of pure MnO2. Even at a high current rate of 500 mA g−1, the capacity still remains at 371.1 mAh g−1 after 50 cycles. Moreover, the lithiation and delithiation processes of MnO2-MoO3 anode material were investigated in detail by X-ray diffraction characterization.



中文翻译:

废Zn-Mn电池为锰源的MnO 2 -MoO 3复合材料作为锂离子电池负极的性能研究

Zn-Mn电池的回收利用与MnO 2 -MoO 3复合材料的合成有关。MnSO 4的中间产物通过湿法冶金回收技术从废Zn-Mn电池中回收,并被选作锰源,通过一种简便的一步水热法合成MnO 2 -MoO 3复合材料。通过X射线衍射,扫描电子显微镜和X射线光电子能谱表征最终产物MnO 2 -MoO 3的组成,形态和价态。所得的MnO 2 -MoO 3复合材料作为锂离子电池的负极在铜箔上呈现出出色的电化学性能。复合届2333.1毫安g的初始比容量-1和停留908.8毫安克-1在100mA g的电流速率50次循环后-1在0.01-3.0 V的电压范围内,比纯的MnO高得多的2。即使在500 mA g -1的高电流速率下,经过50个循环后,容量仍保持在371.1 mAh g -1。此外,通过X射线衍射表征,详细研究了MnO 2 -MoO 3负极材料的锂化和脱锂过程。

更新日期:2020-01-14
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