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Facile Synthesis of Peapod-Like Cu 3 Ge/Ge@C as a High-Capacity and Long-Life Anode for Li-Ion Batteries.

Authors :
Wang X
Xu X
Liu J
Liu Z
Shen J
Li F
Hu R
Yang L
Ouyang L
Zhu M
Source :
Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2019 Sep 02; Vol. 25 (49), pp. 11486-11493. Date of Electronic Publication: 2019 Aug 07.
Publication Year :
2019

Abstract

As anode materials for high-performance Li-ion batteries, peapod-like Ge-based composites, including Ge, a Li-inactive conducting Cu <subscript>3</subscript> Ge, and a porous carbon matrix are synthesized simply by annealing CuGeO <subscript>3</subscript> @dopamine in a H <subscript>2</subscript> /Ar atmosphere. The introduction of the carbon layer and inactive alloying phase Cu <subscript>3</subscript> Ge not only enhances the electrical conductivity of the Ge anode, but also reduces the volume change of Ge during the cell cycle as a buffer. In particular, the anode of this peapod-like Cu <subscript>3</subscript> Ge/Ge@C shows an excellent long cycle life as well as outstanding capacity performance, with a discharge specific capacity up to 934 mA h g <superscript>-1</superscript> after 500 cycles.<br /> (© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Details

Language :
English
ISSN :
1521-3765
Volume :
25
Issue :
49
Database :
MEDLINE
Journal :
Chemistry (Weinheim an der Bergstrasse, Germany)
Publication Type :
Academic Journal
Accession number :
31237004
Full Text :
https://doi.org/10.1002/chem.201901629