General metal-organic framework-derived strategy to synthesize yolk-shell carbon-encapsulated nickelic spheres for sodium-ion batteries

Liqin Wang; Bolin Liu; Youqi Zhu; Min Yang; Changliang Du; Zhanli Han; Xiuyun Yao; Xilan Ma; Chuanbao Cao

doi:10.1016/j.jcis.2021.12.157

General metal-organic framework-derived strategy to synthesize yolk-shell carbon-encapsulated nickelic spheres for sodium-ion batteries

J Colloid Interface Sci. 2022 May:613:23-34. doi: 10.1016/j.jcis.2021.12.157. Epub 2021 Dec 29.

Authors

Liqin Wang¹, Bolin Liu¹, Youqi Zhu², Min Yang¹, Changliang Du¹, Zhanli Han¹, Xiuyun Yao¹, Xilan Ma¹, Chuanbao Cao³

Affiliations

¹ Research Center of Materials Science, Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing Institute of Technology, Beijing 100081, China.
² Research Center of Materials Science, Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing Institute of Technology, Beijing 100081, China. Electronic address: yqzhu@bit.edu.cn.
³ Research Center of Materials Science, Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing Institute of Technology, Beijing 100081, China. Electronic address: cbcao@bit.edu.cn.

PMID: 35032774
DOI: 10.1016/j.jcis.2021.12.157

Abstract

Transition-metal compounds have attracted enormous attention as potential energy storage materials for their high theoretical capacity and energy density. However, the most present transition-metal compounds still suffer from severe capacity decay and limited rate capability due to the lack of robust architectures. Herein, a general metal-organic framework-derived route is reported to fabricate hierarchical carbon-encapsulated yolk-shell nickelic spheres as anode materials for sodium-ion batteries. The nickelic metal-organic framework (Ni-MOF) precursors can be in situ converted into hierarchical carbon-encapsulated Ni₂P (Ni₂P/C), NiS₂ (NiS₂/C) and NiSe₂ (NiSe₂/C) by phosphorization, sulfuration, and selenation reaction, respectively, and maintain their yolk-shell sphere-like morphology. The as-synthesized Ni₂P/C sample can deliver much lower polarization and discharge platform, smaller voltage gap, and faster kinetics in comparison with that of the other two counterparts, and thus achieve higher initial specific capacity (3222.1/1979.3 mAh g^-1) and reversible capacity of 765.4 mAh g^-1 after 110 cycles. This work should provide new insights into the phase and structure engineering of carbon-encapsulated transition-metal compound electrodes via MOFs template for advanced battery systems.

Keywords: Anode; Metal–organic frameworks; Phosphorization; Sodium-ion battery; Yolk-shell.