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Facile Scalable Synthesis of Carbon‐Coated Ge@C and GeX@C (X=S, Se) Anodes for High Performance Lithium‐Ion Batteries
Author(s) -
Wang Miao,
Zheng Hui,
Zhan Wenqi,
Luo Qinxin,
Tang Kaibin
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901408
Subject(s) - anode , germanium , lithium (medication) , materials science , carbon fibers , amorphous solid , ion , electrode , coating , chemical engineering , current density , nanotechnology , composite number , metallurgy , composite material , chemistry , crystallography , silicon , organic chemistry , medicine , engineering , endocrinology , physics , quantum mechanics
Amorphous germanium@C and germanium chalcogenides@C composites have been fabricated via a simply developed synthetic route. Taking advantage of the carbon coating of these materials, they all exhibit excellent Li storage properties as anode materials for lithium ion batteries (LIBs). Typically, Ge@C presents a capacity of 672 mAh g −1 after 80 cycles at current density of 0.5 A g −1 . The capacities of GeS@C are about 604 mAh g −1 over 180 cycles at 0.2 A g −1 and 365 mAh g −1 at 0.5 A g −1 after 1000 cycles, respectively. As for GeSe@C electrode, it exhibit high capacities of nearly 780 mAh g −1 at 0.2 A g −1 over 180 cycles and 562 mAh g −1 at 0.5 A g −1 over 60 cycles.