Mesoporous Germanium Anode Materials for Lithium-Ion Battery with Exceptional Cycling Stability in Wide Temperature Range.

Citation data:

Small (Weinheim an der Bergstrasse, Germany), ISSN: 1613-6829, Vol: 13, Issue: 13

Publication Year:
2017
Usage 5
Abstract Views 5
Captures 18
Readers 18
Citations 12
Citation Indexes 12
Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/21905
PMID:
28098953
DOI:
10.1002/smll.201603045
Author(s):
Choi, Sinho; Cho, Yoon-Gyo; Kim, Jieun; Choi, Nam-Soon; Song, Hyun-Kon; Wang, Guoxiu; Park, Soojin
Publisher(s):
Wiley; WILEY-V C H VERLAG GMBH
Tags:
Biochemistry, Genetics and Molecular Biology; Materials Science; Engineering
article description
Porous structured materials have unique architectures and are promising for lithium-ion batteries to enhance performances. In particular, mesoporous materials have many advantages including a high surface area and large void spaces which can increase reactivity and accessibility of lithium ions. This study reports a synthesis of newly developed mesoporous germanium (Ge) particles prepared by a zincothermic reduction at a mild temperature for high performance lithium-ion batteries which can operate in a wide temperature range. The optimized Ge battery anodes with the mesoporous structure exhibit outstanding electrochemical properties in a wide temperature ranging from -20 to 60 °C. Ge anodes exhibit a stable cycling retention at various temperatures (capacity retention of 99% after 100 cycles at 25 °C, 84% after 300 cycles at 60 °C, and 50% after 50 cycles at -20 °C). Furthermore, full cells consisting of the mesoporous Ge anode and an LiFePO cathode show an excellent cyclability at -20 and 25 °C. Mesoporous Ge materials synthesized by the zincothermic reduction can be potentially applied as high performance anode materials for practical lithium-ion batteries.