A novel Mo <sub>8.7</sub> Nb <sub>6.1</sub> O <sub> <i>x</i> </sub> @NCs egg‐nest composite structure as superior anode material for lithium‐ion storage
Shuling Cheng, Xiuping Yin, Samrat Sarkar, Zhenwei Wang, Qiu‐An Huang, Jiu-Jun Zhang, Yufeng Zhao
Abstract
Abstract Anode materials of lithium‐ion batteries (LIBs) endowed with high‐rate performance and fast charging capability are crucial for future energy storage systems. Here, Mo 8.7 Nb 6.1 O x @NCs (nitrogen‐doped carbon nanotubes, NCs) egg‐nest structure synthesized by an in‐situ solvothermal method is reported. The Mo 8.7 Nb 6.1 O x @NCs egg‐nest exhibits high embedding potential, high pseudo‐capacitance contribution rate (87.5%), and low charge transfer resistance. The electrochemical results show that Mo 8.7 Nb 6.1 O x @NCs demonstrates excellent rate performance (reversible capacity of 196.8 mAh·Ag −1 at 10 A·Ag −1 , and full charging only takes 1.1 min) and excellent cycle stability (reversible capacity of 513 mAh.Ag −1 at 0.5 A.Ag −1 combined with a capacity loss of only 5.4% after 100 cycles), outperforming the state‐of‐the‐art literature. The full cell is assembled with Mo 8.7 Nb 6.1 O x @NCs as the anode and LiFePO 4 as the cathode, which can provide a remarkably high energy density of 731.9 Wh·kg −1 , indicating its excellent prospect for practical applications.