Characterizing local structure of SiO x using confocal μ-Raman spectroscopy and its effects on electrochemical property
作者: Sunyoung YooJeongHan KimByoungwoo Kang
作者单位: 1Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
刊名: Electrochimica Acta, 2016, Vol.212 , pp.68-75
来源数据库: Elsevier Journal
DOI: 10.1016/j.electacta.2016.06.154
关键词: SiORaman spectroscopyMicrostructureLithium ion battery
原始语种摘要: Abstract(#br)We use confocal μ-Raman spectroscopy to characterize the local microstructure of SiO x particles that are composed of amorphous and crystalline phase and to understand its effects on electrochemical reactions. Particles of bare SiO x (x1) consist of an inhomogeneous mixture of a- Si and c- Si; some particles mainly have a- Si phase but others consist mainly of micro-sized crystalline Si phase. In contrast, particles of C-coated SiO x are composed of uniform nano-sized crystalline Si embedded in a- SiO 2 matrix with small amounts of a- Si. The two samples had different electrochemical properties due to this difference in microstructure. Initial coulombic efficiency (ICE) and capacity retention were higher in the C-coated SiO x than in the...
全文获取路径: Elsevier  (合作)
影响因子:3.777 (2012)