期刊
NANOSCALE
卷 12, 期 25, 页码 13540-13547出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr02930k
关键词
-
类别
资金
- Innosuisse - Swiss Innovation Agency
- EMPAPOSTDOCS-II programme
- European Union's Horizon 2020 Research and Innovation Programme under the Marie Skodowska-Curie grant [754364]
- Swiss National Science Foundation [SNF 206021_64024]
Silicon oxycarbide (SiOC) has recently regained attention in the field of Li-ion batteries, owing to its effectiveness as a host matrix for nanoscale anode materials alloying with Li. The SiOC matrix, itself providing a high Li-ion storage capacity of 600 mA h g(-1), assists in buffering volumetric changes upon lithiation and largely suppresses the formation of an unstable solid-electrolyte interface. Herein, we present the synthesis of homogeneously embedded Sb nanoparticles in a SiOC matrix with the size of 5-40 nmviathe pyrolysis of a preceramic polymer. The latter is obtained through the Pt-catalyzed gelation reaction of Sb 2-ethylhexanoate and a poly(methylhydrosiloxane)/divinylbenzene mixture. The complete miscibility of these precursors was achieved by the functionalization of poly(methylhydrosiloxane) with apolar divinyl benzene side-chains. We show that anodes composed of SiOC/Sb exhibit a high rate capability, delivering charge storage capacity in the range of 703-549 mA h g(-1)at a current density of 74.4-2232 mA g(-1). The impact of Sb on the Si-O-C bonding and on free carbon content of SiOC matrix, along with its concomitant influence on Li-ion storage capacity of SiOC was assessed by Raman and(29)Si and(7)Li solid-state NMR spectroscopies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据