Coffee waste-derived one-step synthesis of a composite structure with Ge nanoparticles surrounded by amorphous carbon for Li-ion batteries
- Authors
- Shin, Jae-Hoon; Park, Deok-Hye; Lee, Woo-Jun; Moon, Sang-Hyun; Choi, Jin-Hyeok; Kim, Ji-Hwan; Jang, Jae-Sung; Kim, Sung-Beom; Park, Kyung-Won
- Issue Date
- 31-Dec-2021
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Coffee waste; One-step synthesis; Ge/C; Anode; Lithium-ion batteries
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.889
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 889
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/41390
- DOI
- 10.1016/j.jallcom.2021.161685
- ISSN
- 0925-8388
- Abstract
- Germanium with a high specific capacity is a promising anode material for Li-ion batteries; However, critical issues such as the pulverization of the electrode during cycling and high cost are yet to be addressed. In this study, we fabricated a composite (Ge/C) consisted of Ge and C using a coffee waste-derived one-step synthesis with GeO2. Ge/C exhibited an improved electrochemical performance, with a discharge capacity of similar to 465 mAh g(-1) at a current density of 100 mA g(-1) and retention of similar to 96% after 100 cycles, compared to those of a Ge/GeO2 sample prepared by GeO2 under the same heating conditions as those for Ge/C. The enhanced performance of the Ge/C anode may be attributed to the improved electronic and ionic motions in the anode, as a result of the amorphous conductive carbon phase adjacent to the Ge active material. (C) 2021 Elsevier B.V. All rights reserved.
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Collections - College of Engineering > Department of Chemical Engineering > 1. Journal Articles
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