A General Route for Encapsulating Monodispersed Transition Metal Phosphides into Carbon Multi‐Chambers toward High‐Efficient Lithium‐Ion Storage with Underlying Mechanism Exploration

• DOI: 10.1002/adfm.202212100
• Publication Date: 2023-01-19T05:12:25Z
• Authors: Xiang Cui; Jiaxin Chen; Zhefei Sun; Lei Wang; Qianqian Peng; Bensheng Xiao; Ligong Zhao; He Zheng; Yong Wang; Jianbo Wang; Xianfei Chen; Qiaobao Zhang; Shuangqiang Chen
• Keywords: Carbon fibers

Abstract Transition metal phosphides (MP x ) with high theoretical capacities and low cost are regarded as the most promising anodes for lithium‐ion batteries (LIBs), but large volume variations sluggish kinetics largely restrict their development. To solve above challenges, herein a generic effective method is proposed to encapsulate various monodispersed MP into flexible carbon multi‐chambers @NC, MNi, Fe, Co, Cu, etc.) pre‐reserved voids, working LIBs markedly boosting Li + storage performance. Ni 2 P@NC, one representative example of @NC anode, shows reversible capacity (613 mAh g −1 , 200 cycles at 0.2 A ), superior cycle stability (475 800 ). Full cell coupled LiFePO 4 displays (150.1 0.1 stable cycling In situ X‐ray diffraction transmission electron microscope techniques confirm conversion reaction mechanism robust structural integrity, accounting enhanced rate Theoretical calculations reveal synergistic effect between shells, which can significantly promote transfer reduce diffusion energy barriers, paving ways design high‐energy‐density materials systems.