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Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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Atomic-scale combination of germanium-zinc nanofibers for structural and electrochemical evolution

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Title
Atomic-scale combination of germanium-zinc nanofibers for structural and electrochemical evolution
Author
Song, GyujinCheong, Jun YoungKim, ChanhoonLuo, LangliHwang, ChihyunChoi, SunghoRyu, JaegeonKim, SunghoSong, Woo-JinSong, Hyun-KonWang, ChongminKim, Il-DooPark, Soojin
Issue Date
2019-05
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.10, pp.2364
Abstract
Alloys are recently receiving considerable attention in the community of rechargeable batteries as possible alternatives to carbonaceous negative electrodes; however, challenges remain for the practical utilization of these materials. Herein, we report the synthesis of germanium-zinc alloy nanofibers through electrospinning and a subsequent calcination step. Evidenced by in situ transmission electron microscopy and electrochemical impedance spectroscopy characterizations, this one-dimensional design possesses unique structures. Both germanium and zinc atoms are homogenously distributed allowing for outstanding electronic conductivity and high available capacity for lithium storage. The as-prepared materials present high rate capability (capacity of similar to 50% at 20 C compared to that at 0.2 C-rate) and cycle retention (73% at 3.0 C-rate) with a retaining capacity of 546 mAh g(-1) even after 1000 cycles. When assembled in a full cell, high energy density can be maintained during 400 cycles, which indicates that the current material has the potential to be used in a large-scale energy storage system.
URI
https://scholarworks.unist.ac.kr/handle/201301/30724
URL
https://www.nature.com/articles/s41467-019-10305-x
DOI
10.1038/s41467-019-10305-x
ISSN
2041-1723
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ECHE_Journal Papers
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