Petal-like metal-organic framework stabilized Si@C with long cycle life and excellent kinetics

Haining Yang; Shijun Ji; Jinpeng Yin; Wei Feng; Weiqiang Kong; Zhongsheng Wen

doi:10.1016/j.jcis.2020.10.102

Petal-like metal-organic framework stabilized Si@C with long cycle life and excellent kinetics

J Colloid Interface Sci. 2021 Mar 15:586:381-390. doi: 10.1016/j.jcis.2020.10.102. Epub 2020 Oct 27.

Authors

Haining Yang¹, Shijun Ji¹, Jinpeng Yin¹, Wei Feng¹, Weiqiang Kong¹, Zhongsheng Wen²

Affiliations

¹ Department of Materials, Dalian Maritime University, Dalian 116026, China.
² Department of Materials, Dalian Maritime University, Dalian 116026, China. Electronic address: zswen5@gmail.com.

PMID: 33160628
DOI: 10.1016/j.jcis.2020.10.102

Abstract

Poor electrochemical kinetics caused by the unstable structure for the dramatically volumetric expansion (>300%) hinders the application of silicon in rechargeable lithium ion batteries. Si@C-Ni-MOF composites with petal-like Ni-MOFs as the skeleton and Si@C nanoparticles as the active center were synthesized via facile solvothermal process. The resulting Ni-MOF-Si@C material maintains admirable stability on cycling, and its capacity remains 1545.3 mAh g^-1 with a high capacity retention rate of 99.79% after 300 cycles at the current density of 200 mA g^-1. The enhancement on the kinetics is obtained, attributing to the porous structure created by the petal-like Ni-MOFs and the strong interface bonding between Si@C and Ni-MOFs.

Keywords: Interface bonding; Ni metal organic frame; Silicon anode; Solvothermal method.