TY - GEN
T1 - Cuprous oxide/copper particles prepared by a facile wet-chemical reduction approach as anode material for Li Ion batteries
AU - Bian, Yajuan
AU - Yang, Meng
AU - Zhao, Xiangyu
AU - Ma, Liqun
AU - Jin, Chuanwei
AU - Ding, Yi
AU - Shen, Xiaodong
PY - 2012
Y1 - 2012
N2 - Cu 2O/Cu composite particles were successfully synthesized by a novel facile template-free chemical reduction route at room temperature. X-ray diffraction (XRD) results showed that the sample mainly consisted of the Cu 2O phase coexisting with a few Cu phases. Scanning electron microscopy (SEM) images indicated that the regular particles with a cubic shape about 2-3 μm is Cu 2O. In addition, the electrochemical behavior of the Cu 2O/Cu composite electrode and copper electrode during the charging and discharging process were both investigated. It was found that the first discharge capacity of Cu 2O/Cu composite electrode was up to 650 mAh·g -1, which is much higher than the theoretical capacity of Cu 2O (about 375 mAh·g -1). The additional capacity is attributed to the electrodeposition of lithium on pure copper, confirmed by the electrochemical property of copper as the anode material of the lithium-ion battery. The copper electrode presented a high discharge capacity of 280 mAh·g -1 during the first cycle. However, a large irreversible capacity as same as the cuprous oxide electrode was observed during the first charging process. It is indicated that deposition of lithium on the Cu particle surface acts as a barrier preventing the contact between the Cu and the electrolyte. Furthermore, the Cu 2O/Cu composite electrode can exhibit reversible capacity of 210 mAh·g -1 at a charge-discharge rate of 30 mA·g -1 after 40 cycles.
AB - Cu 2O/Cu composite particles were successfully synthesized by a novel facile template-free chemical reduction route at room temperature. X-ray diffraction (XRD) results showed that the sample mainly consisted of the Cu 2O phase coexisting with a few Cu phases. Scanning electron microscopy (SEM) images indicated that the regular particles with a cubic shape about 2-3 μm is Cu 2O. In addition, the electrochemical behavior of the Cu 2O/Cu composite electrode and copper electrode during the charging and discharging process were both investigated. It was found that the first discharge capacity of Cu 2O/Cu composite electrode was up to 650 mAh·g -1, which is much higher than the theoretical capacity of Cu 2O (about 375 mAh·g -1). The additional capacity is attributed to the electrodeposition of lithium on pure copper, confirmed by the electrochemical property of copper as the anode material of the lithium-ion battery. The copper electrode presented a high discharge capacity of 280 mAh·g -1 during the first cycle. However, a large irreversible capacity as same as the cuprous oxide electrode was observed during the first charging process. It is indicated that deposition of lithium on the Cu particle surface acts as a barrier preventing the contact between the Cu and the electrolyte. Furthermore, the Cu 2O/Cu composite electrode can exhibit reversible capacity of 210 mAh·g -1 at a charge-discharge rate of 30 mA·g -1 after 40 cycles.
KW - Charge and discharge testing
KW - Copper
KW - Cu O/Cu composite
KW - Electrochemical property
KW - Electrodeposition of lithium
UR - http://www.scopus.com/inward/record.url?scp=84860804773&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.509.28
DO - 10.4028/www.scientific.net/AMR.509.28
M3 - 会议稿件
AN - SCOPUS:84860804773
SN - 9783037854181
T3 - Advanced Materials Research
SP - 28
EP - 35
BT - Latest Development of Applied Materials Technology
T2 - 6th Cross-Strait Conference on Advanced Engineering Materials
Y2 - 8 November 2011 through 11 November 2011
ER -