Copper Doped Li3VO4 as Anode Material for Lithium‐ion Batteries,Electroanalysis

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Copper Doped Li3VO4 as Anode Material for Lithium‐ion Batteries
Electroanalysis ( IF 2.7 ) Pub Date : 2020-10-09 , DOI: 10.1002/elan.202060380
Isaac Mulaudzi ₁ , Yi Zhang ₂ , Gebhu F. Ndlovu ₃ , Yuping Wu ₂ , Malebogo A. Legodi ₁ , Teunis Ree ₁

Affiliation

Li₃VO₄ has been considered as a promising anode material because of its high theoretical capacity (394mAh g⁻¹) and zero strain during the charge and discharge processes. However, its electronic conductivity is low, which has led to an electrochemical performance unfavourable for practical application. In this work, copper‐doped Li₃VO₄ is prepared by a simple and inexpensive sol‐gel method. The doped Li₃VO₄ delivers high initial discharge and charge capacities of up to 63 mAh g⁻¹ after 25 cycles for 5 % Cu‐doped material at a rate of 0.5 C. Conductive Cu is found to enable better Li⁺ ion storage due to the improved electronic conductivity, Li ion diffusion, and structural stability, improving cycling and rate performance. This work provides some hints for preparing Li₃VO₄ based anodes with high electrochemical performance.

中文翻译：

铜掺杂的Li3VO4作为锂离子电池的负极材料

Li ₃ VO ₄由于其高理论容量（394mAh g ^-1）和在充电和放电过程中的零应变而被认为是有前途的负极材料。但是，其电导率低，导致电化学性能不适合实际应用。在这项工作中，掺杂铜的Li ₃ VO ₄是通过简单且廉价的溶胶-凝胶法制备的。掺杂的Li ₃ VO ₄以0.5 C的速率掺杂25％的Cu掺杂材料，经过25次循环后，可提供高达63 mAh g ^-1的高初始放电和充电容量。发现导电性Cu可以实现更好的Li ⁺由于改善了电导率，锂离子扩散和结构稳定性，改善了循环性能和倍率性能，从而提高了离子存储能力。这项工作为制备具有高电化学性能的Li ₃ VO ₄基阳极提供了一些提示。

更新日期：2020-12-01

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