TY - JOUR
T1 - Novel high-performance Ga2Te3anodes for Li-ion batteries
AU - Lee, Young Han
AU - Hwa, Yoon
AU - Park, Cheol Min
N1 - Funding Information:
This study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIP) (NRF-2021R1A2B5B01002570) and by the Ministry of Science and ICT (MSIT), Korea, under the Grand Information Technology Research Center support program (IITP-2021-2020-0-01612) supervised by the Institute for Information & Communications Technology Planning & Evaluation (IITP).
Publisher Copyright:
© The Royal Society of Chemistry 2021.
PY - 2021/9/28
Y1 - 2021/9/28
N2 - The development of high-capacity and high-power lithium-ion batteries (LIBs) is a key challenge to meet the increasing demand for advanced mobile electronics and electric vehicles. A novel high-capacity and high-power Ga2Te3anode material for LIBs, which exhibits a distinctive reaction mechanism with Li ions, has been introduced in this study. Two types of Ga2Te3/C composite were preparedviadifferent synthetic routes, namely carbon thermal decomposition (TD) and high-energy ball milling (BM), to improve the electrochemical performance of Ga2Te3anodes, and their electrochemical performances were compared. The electrochemical evaluation results indicate that the Ga2Te3/C composite produced by BM (BM-Ga2Te3/C) showed better electrochemical performance by delivering much smaller Ga2Te3nanocrystallites than the Ga2Te3/C composite produced by TD (TD-Ga2Te3/C). Furthermore, the BM-Ga2Te3/C anode showed a highly reversible initial volumetric capacity (1245 mA h cm−3), stable capacity retention (93.2% after 500 cycles), and excellent high-rate performance (∼1000 mA h cm−3at 1C after 500 cycles). These high electrochemical performances, which were demonstratedvia ex situanalyses, were attained by a unique three-step nano-confinement process of Ga2Te3in BM-Ga2Te3/C. Thus, this study provides a new material development strategy of employing mechano- and electro-chemical nano-confinement processes to develop high-performance anodes for LIBs.
AB - The development of high-capacity and high-power lithium-ion batteries (LIBs) is a key challenge to meet the increasing demand for advanced mobile electronics and electric vehicles. A novel high-capacity and high-power Ga2Te3anode material for LIBs, which exhibits a distinctive reaction mechanism with Li ions, has been introduced in this study. Two types of Ga2Te3/C composite were preparedviadifferent synthetic routes, namely carbon thermal decomposition (TD) and high-energy ball milling (BM), to improve the electrochemical performance of Ga2Te3anodes, and their electrochemical performances were compared. The electrochemical evaluation results indicate that the Ga2Te3/C composite produced by BM (BM-Ga2Te3/C) showed better electrochemical performance by delivering much smaller Ga2Te3nanocrystallites than the Ga2Te3/C composite produced by TD (TD-Ga2Te3/C). Furthermore, the BM-Ga2Te3/C anode showed a highly reversible initial volumetric capacity (1245 mA h cm−3), stable capacity retention (93.2% after 500 cycles), and excellent high-rate performance (∼1000 mA h cm−3at 1C after 500 cycles). These high electrochemical performances, which were demonstratedvia ex situanalyses, were attained by a unique three-step nano-confinement process of Ga2Te3in BM-Ga2Te3/C. Thus, this study provides a new material development strategy of employing mechano- and electro-chemical nano-confinement processes to develop high-performance anodes for LIBs.
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U2 - 10.1039/d1ta05336a
DO - 10.1039/d1ta05336a
M3 - Article
AN - SCOPUS:85115707416
SN - 2050-7488
VL - 9
SP - 20553
EP - 20564
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 36
ER -