Scalable Construction of Hollow Multishell Co<sub>3</sub>O<sub>4</sub> with Mitigated Interface Reconstruction for Efficient Lithium Storage
Junhao Li, Fangyuan Li, Jinyun Liao, Hao Li, Dai Dang, Quanbing Liu, Hong‐Jie Peng
Abstract
Abstract To meet the growing needs for high‐capacity and/or high‐power energy storage systems, designing high‐performance lithium storage materials beyond traditional graphite anodes are crucial for lithium‐ion batteries. Cobalt oxide (Co 3 O 4 ) as a potential anode material is proved to own a high theoretical capacity, but its practical application is always limited by the conflict between performance comprehensiveness and synthesis scalability. Herein, a uniform hollow multishell Co 3 O 4 with high specific surface area is designed via a simple and scalable route based on inhomogeneous contraction. The mean diameter of precursor and inner structure are influenced by hydrothermal reaction time. Owing to the unique structure, the material exhibits high electrochemical performance for lithium storage. The as‐prepared hollow sphere delivers a high specific capacity of 1012 mAh g −1 at a current density of 445 mA g −1 even after 200 cycles. Moreover, the synthetic strategy is readily extendable for accurate construction of other desired energy storage materials.