Nonstoichiometric Cu<sub>0.6</sub>Ni<sub>0.4</sub>Co<sub>2</sub>O<sub>4</sub> Nanowires as an Anode Material for High Performance Lithium Storage

oleh: Junhao Li, Ningyi Jiang, Jinyun Liao, Yufa Feng, Quanbing Liu, Hao Li

Format: Article
Diterbitkan: MDPI AG 2020-01-01

Deskripsi

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 Cu<sub>0.6</sub>Ni<sub>0.4</sub>Co<sub>2</sub>O<sub>4</sub> nanowires for high performance lithium-ion storage. It is found that the specific capacity of Cu<sub>0.6</sub>Ni<sub>0.4</sub>Co<sub>2</sub>O<sub>4</sub> nanowires remain 880 mAh g<sup>&#8722;1</sup> after 50 cycles, exhibiting much better electrochemical performance than CuCo<sub>2</sub>O<sub>4</sub> and NiCo<sub>2</sub>O<sub>4</sub>. After experiencing a large current charge and discharge state, the discharge capacity of Cu<sub>0.6</sub>Ni<sub>0.4</sub>Co<sub>2</sub>O<sub>4</sub> nanowires recovers to 780 mAh g<sup>&#8722;1</sup> at 50 mA g<sup>&#8722;1</sup>, which is ca. 88% of the initial capacity. The high electrochemical performance of Cu<sub>0.6</sub>Ni<sub>0.4</sub>Co<sub>2</sub>O<sub>4</sub> 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.