Li Junhao, Jiang Ningyi, Liao Jinyun, Feng Yufa, Liu Quanbing, Li Hao
School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
Nanomaterials (Basel). 2020 Jan 22;10(2):191. doi: 10.3390/nano10020191.
Transition metal oxide is one of the most promising anode materials for lithium-ion batteries. Generally, the electrochemical property of transition metal oxides can be improved by optimizing their element components and controlling their nano-architecture. Herein, we designed nonstoichiometric CuNiCoO nanowires for high performance lithium-ion storage. It is found that the specific capacity of CuNiCoO nanowires remain 880 mAh g after 50 cycles, exhibiting much better electrochemical performance than CuCoO and NiCoO. After experiencing a large current charge and discharge state, the discharge capacity of CuNiCoO nanowires recovers to 780 mAh g at 50 mA g, which is ca. 88% of the initial capacity. The high electrochemical performance of CuNiCoO nanowires is related to their better electronic conductivity and synergistic effect of metals. This work may provide a new strategy for the design of multicomponent transition metal oxides as anode materials for lithium-ion batteries.
过渡金属氧化物是锂离子电池最具潜力的负极材料之一。一般来说，通过优化过渡金属氧化物的元素组成并控制其纳米结构，可以改善其电化学性能。在此，我们设计了用于高性能锂离子存储的非化学计量比CuNiCoO纳米线。研究发现，CuNiCoO纳米线在50次循环后比容量仍保持在880 mAh g，展现出比CuCoO和NiCoO更好的电化学性能。在经历大电流充放电状态后，CuNiCoO纳米线在50 mA g下的放电容量恢复至780 mAh g，约为初始容量的88%。CuNiCoO纳米线的高电化学性能与其较好的电子导电性和金属的协同效应有关。这项工作可能为设计多组分过渡金属氧化物作为锂离子电池负极材料提供一种新策略。
