Petal-like metal-organic framework stabilized Si@C with long cycle life and excellent kinetics
作者：HN Yang, SJ Ji, JP Yin, Wei Feng, WQ Kong, ZS Wen
關(guān)鍵字：Solvothermal method, Ni metal organic frame, Interface bonding, Silicon anode
論文來源：期刊
具體來源：Journal of Colloid and Interface Science
發(fā)表時(shí)間：2020年
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 200mA 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.
https://doi.org/10.1016/j.jcis.2020.10.102