A Composite Structure of Cu 3 Ge/Ge/C Anode Promise Better Rate Property for Lithium Battery | Zendy

Liang Jianwen | Zendy; Li Xiaona | Zendy; Hou Zhiguo | Zendy; Jiang Jun | Zendy; Hu Lei | Zendy; Zhang Wanqun | Zendy; Zhu Yongchun | Zendy; Qian Yitai | Zendy

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A Composite Structure of Cu 3 Ge/Ge/C Anode Promise Better Rate Property for Lithium Battery

Author(s) -

Liang Jianwen,

Li Xiaona,

Hou Zhiguo,

Jiang Jun,

Hu Lei,

Zhang Wanqun,

Zhu Yongchun,

Qian Yitai

Publication year - 2016

Publication title -

small

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.785

H-Index - 236

eISSN - 1613-6829

pISSN - 1613-6810

DOI - 10.1002/smll.201602545

Subject(s) - anode , materials science , composite number , battery (electricity) , lithium (medication) , germanium , dielectric spectroscopy , electrode , electrochemistry , density functional theory , lithium ion battery , ion , energy storage , chemical engineering , nanotechnology , composite material , optoelectronics , chemistry , silicon , power (physics) , computational chemistry , thermodynamics , medicine , physics , organic chemistry , engineering , endocrinology

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.

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