阳极
锂(药物)
材料科学
金属锂
碳纤维
兴奋剂
复合数
电极
金属
纳米技术
金属有机骨架
化学工程
复合材料
吸附
化学
光电子学
冶金
有机化学
物理化学
内分泌学
工程类
医学
作者
Guanrong Ou,Ming Huang,Xiaomeng Lü,Ingo Manke,Yang Chao,Ji Qian,Xiaoming Lin,Renjie Chen
出处
期刊:Small
[Wiley]
日期:2023-12-19
卷期号:20 (17)
被引量:3
标识
DOI:10.1002/smll.202307615
摘要
Abstract Transition metal phosphides (TMPs) have been regarded as the prospective anodes for lithium‐ion batteries (LIBs). However, their poor intrinsic conductivity and inevitable large volume variation result in sluggish redox kinetics and the collapse of electrode structure during cycling, which substantially hinders their practical use. Herein, an effective composite electrodes design strategy of “assembly and phosphorization” is proposed to construct synergistic N‐doped carbon‐encapsulated NiCoP@N‐C‐based composites, employing a metal‐organic frameworks (MOFs) as sacrificial hosts. Serving as the anodes for LIBs, one representative P‐NCP‐NC‐600 electrode exhibits high reversible capacity (858.5 mAh g −1 , 120 cycles at 0.1 A g −1 ) and superior long‐cycle stability (608.7 mAh g −1 , 500 cycles at 1 A g −1 ). The impressive performances are credited to the synergistic effect between its unique composite structure, electronic properties and ideal composition, which achieve plentiful lithium storage sites and reinforce the structural architecture. By accompanying experimental investigations with theoretical calculations, a deep understanding in the lithium storage mechanism is achieved. Furthermore, it is revealed that a more ideal synergistic effect between NiCoP components and N‐doped carbon frameworks is fundamentally responsible for the realization of superb lithium storage properties. This strategy proposes certain instructive significance toward designable high‐performance TMP‐based anodes for high‐energy density LIBs.
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