Precision integration of uniform molecular-level carbon into porous silica framework for synergistic electrochemical activation in high-performance lithium-ion batteries

Authors
Oh, SeungbaeDong, XueWoo, ChaeheonZhang, XiaojieKim, YeongjinChoi, Kyung HwanLee, BomKim, Ji-HeeKang, JinsuBang, Hyeon-SeokJeon, JihoOh, Hyung-SukYu, Hak KiMun, JunyoungChoi, Jae-Young
Issue Date
2024-06
Publisher
Wiley
Citation
EcoMat, v.6, no.6
Abstract
The development of advanced anode materials for lithium-ion batteries that can provide high specific capacity and stable cycle performance is of paramount importance. This study presents a novel approach for synthesizing molecular-level homogeneous carbon integration to porous SiO2 nanoparticles (SiO2@C NPs) tailored to enhance their electrochemical activities for lithium-ion battery anode. By varying the ratio of the precursors for sol-gel reaction of (phenyltrimethoxysilane (PTMS) and tetraethoxysilane (TEOS)), the carbon content and porosity within SiO2@C NPs is precisely controlled. With a 4:6 PTMS and TEOS ratio, the SiO2@C NPs exhibit a highly mesoporous structure with thin carbon and the partially reduced SiOx phases, which balances ion and charge transfer for electrochemical activation of SiO2@C NPs resulting remarkable capacity and cycle performance. This study offers a novel strategy for preparing affordable high capacity SiO2-based advanced anode materials with enhanced electrochemical performances. image
Keywords
ANODE MATERIAL; DESIGN; NANOPARTICLES; STORAGE; LITHIATION; PARTICLES; COMPOSITE; SIO2; anode; Li-ion battery; porous materials; SiO2@carbon nanoparticles
URI
https://pubs.kist.re.kr/handle/201004/150148
DOI
10.1002/eom2.12469
Appears in Collections:
KIST Article > 2024
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