2026-10-14T22:09:54Z https://www.scidb.cn/oai

10.57760/sciencedb.j00125.0009l 2026-09-23T19:49:07Z

2026-09-23 Silicon deposition in the pores of a microporous carbon enables stable high-performance silicon/carbon anodes doi:10.57760/sciencedb.j00125.0009l en ilicon/carbon composites are promising anodematerials for lithium-ion batteries because of the high capacity of silicon and the structural stability of the carbonframeworks. However, achieving a uniform distribution andhigh silicon loading while limiting severe volume expansionremains a critical challenge. We have shown that a carbonhost with a high microporosity has a strong confinement, enabling the fabrication of silicon/carbon composites with highsilicon loading. More importantly, the microporosity isfound to govern both the silicon deposition behavior and theresulting electrochemical performance. A high microporecontent (92%) promotes preferential silane adsorption anddirects silicon nucleation within micropores, producing uniformly dispersed amorphous silicon domains with a highmass loading of 51%. The confinement mechanism simultaneously buffers volume expansion during lithiation and suppressesthe formation of the detrimental crystalline Li15Si4 phase. Consequently, the composite with 92% microporosity delivers a highinitial Coulombic efficiency of 91.2% and improved cycling stability, retaining 82.42% of its capacity (814.93 mAh g-1) after60 cycles. This work establishes micropore-induced confinement as an effective design principle for high-performancesilicon/carbon anodes, enabling high silicon loading while maintaining structural stability. Microporous carbon; Chemical vapor deposition; Confinement effect; Silicon/carbon anode; Lithium-ion battery 刘沛奇 徐行文 石琳 孔德斌 王梦雨 魏兴煜 胡霞 韩俊伟 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank