A Composite Structure of Cu3Ge/Ge/C Anode Promise Better Rate Property for Lithium Battery.
Much effort has been made to search for high energy and high power density electrode materials for lithium ion batteries. Here, a composite structure among Ge, C and Cu3Ge in Cu3Ge/Ge/C materials with a high rate performance of lithium batteries has been reported. Such Cu3Ge/Ge/C composite is synthesized through the in-situ formation of Ge, C and Cu3Ge by one-pot reaction. Density function theory (DFT) calculations and electrochemical impedance spectroscopy (EIS) suggest a higher electron mobility of the hibrid Cu3Ge/Ge/C composites through the in-situ preparation. As a result, remarkable charge rate over 300 C (fast delithiated capability) and outstanding cycling stability (≈0.02% capacity decay per cycle for 500 cycles at 0.5 C) are achieved for the Cu3Ge/Ge/C composites anode. These Cu3Ge/Ge/C composites demonstrate another perspective to explore the energy storage materials and should provide a new pathway for the design of advanced electrode materials.
School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, P. R. China.
Jianwen
J
Liang
Hefei National Laboratory for Physical Science at Micro-scale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Xiaona
X
Li
Hefei National Laboratory for Physical Science at Micro-scale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Zhiguo
Z
Hou
Hefei National Laboratory for Physical Science at Micro-scale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Jun
J
Jiang
Hefei National Laboratory for Physical Science at Micro-scale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Lei
L
Hu
Hefei National Laboratory for Physical Science at Micro-scale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Wanqun
W
Zhang
Hefei National Laboratory for Physical Science at Micro-scale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Yongchun
Y
Zhu
School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, P. R. China.|Hefei National Laboratory for Physical Science at Micro-scale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Yitai
Y
Qian
Cu3Ge/Ge/C composites; composite structures; germanium; lithium batteries; rate performance