TY - JOUR
T1 - Structural analysis of highly-durable SiOC composite anode prepared by electrodeposition for lithium secondary batteries
AU - Nara, Hiroki
AU - Yokoshima, Tokihiko
AU - Otaki, Mitsutoshi
AU - Momma, Toshiyuki
AU - Osaka, Tetsuya
N1 - Funding Information:
This work was supported partly by “Research & Development Initiative for Scientific Innovation of New Generation Batteries” from the New Energy and Industrial Technology Development Organization of Japan and by the Grant-in-Aid for Specially Promoted Research “Establishment of Electrochemical Device Engineering” and “Grants for excellent Graduate Schools (Practical Chemical Wisdom)” from the Ministry of Education, Culture, Sports, Science and Technology, Japan .
PY - 2013
Y1 - 2013
N2 - The structure of the highly durable silicon-based anode prepared by electrodeposition was investigated for volume change and chemical structure. With repeated charge-discharge cycles, the volume change resulting from the anode film thickness decreased, and, after 100 cycles, essentially no difference was observed between the charged and discharged states. The buffering effect of the volume change was considered to be achieved by the formation of Li 2O, Li2CO3, and lithium silicates such as Li4SiO4, whose existence were supported by STEM, EELS, and XPS analyses. From the structural analyses, the main reactions related to the capacity of the silicon-based anode were considered to be the formation of LixSi and Li2Si2O5. LixSi and Li2Si2O5 can be delithiated into Si and SiO2, respectively.
AB - The structure of the highly durable silicon-based anode prepared by electrodeposition was investigated for volume change and chemical structure. With repeated charge-discharge cycles, the volume change resulting from the anode film thickness decreased, and, after 100 cycles, essentially no difference was observed between the charged and discharged states. The buffering effect of the volume change was considered to be achieved by the formation of Li 2O, Li2CO3, and lithium silicates such as Li4SiO4, whose existence were supported by STEM, EELS, and XPS analyses. From the structural analyses, the main reactions related to the capacity of the silicon-based anode were considered to be the formation of LixSi and Li2Si2O5. LixSi and Li2Si2O5 can be delithiated into Si and SiO2, respectively.
KW - Durability
KW - Electrodeposition
KW - Lithium battery
KW - Organic/inorganic composite
KW - Silicon anode
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U2 - 10.1016/j.electacta.2013.07.143
DO - 10.1016/j.electacta.2013.07.143
M3 - Article
AN - SCOPUS:85027924525
SN - 0013-4686
VL - 110
SP - 403
EP - 410
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -