Nonstoichiometric Cu0.6Ni0.4Co2O4 Nanowires as an Anode Material for High Performance Lithium Storage

• Published in: Nanomaterials (Basel, Switzerland) Vol. 10; no. 2; p. 191
• Main Authors: Li, Junhao, Jiang, Ningyi, Liao, Jinyun, Feng, Yufa, Liu, Quanbing, Li, Hao
• Format: Journal Article
• Language: English
• Published: MDPI 22.01.2020; MDPI AG
• Subjects: anode material; Communication; cu0.6ni0.4co2o4 nanowires; doping; lithium-ion battery; nonstoichiometric
• ISSN: 2079-4991; 2079-4991
• 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 Cu0.6Ni0.4Co2O4 nanowires for high performance lithium-ion storage. It is found that the specific capacity of Cu0.6Ni0.4Co2O4 nanowires remain 880 mAh g−1 after 50 cycles, exhibiting much better electrochemical performance than CuCo2O4 and NiCo2O4. After experiencing a large current charge and discharge state, the discharge capacity of Cu0.6Ni0.4Co2O4 nanowires recovers to 780 mAh g−1 at 50 mA g−1, which is ca. 88% of the initial capacity. The high electrochemical performance of Cu0.6Ni0.4Co2O4 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.