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

Author

Listed:
  • Gyujin Song

    (Ulsan National Institute of Science and Technology (UNIST))

  • Jun Young Cheong

    (Korea Advanced Institute of Science and Technology)

  • Chanhoon Kim

    (Korea Institute of Industrial Technology)

  • Langli Luo

    (Pacific Northwest National Laboratory)

  • Chihyun Hwang

    (Ulsan National Institute of Science and Technology (UNIST))

  • Sungho Choi

    (Pohang University of Science and Technology (POSTECH))

  • Jaegeon Ryu

    (Pohang University of Science and Technology (POSTECH))

  • Sungho Kim

    (Ulsan National Institute of Science and Technology (UNIST))

  • Woo-Jin Song

    (Pohang University of Science and Technology (POSTECH))

  • Hyun-Kon Song

    (Ulsan National Institute of Science and Technology (UNIST))

  • Chongmin Wang

    (Pacific Northwest National Laboratory)

  • Il-Doo Kim

    (Korea Advanced Institute of Science and Technology)

  • Soojin Park

    (Pohang University of Science and Technology (POSTECH))

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 ~ 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.

Suggested Citation

  • Gyujin Song & Jun Young Cheong & Chanhoon Kim & Langli Luo & Chihyun Hwang & Sungho Choi & Jaegeon Ryu & Sungho Kim & Woo-Jin Song & Hyun-Kon Song & Chongmin Wang & Il-Doo Kim & Soojin Park, 2019. "Atomic-scale combination of germanium-zinc nanofibers for structural and electrochemical evolution," Nature Communications, Nature, vol. 10(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10305-x
    DOI: 10.1038/s41467-019-10305-x
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    Cited by:

    1. Ybray, Sultan & Dikhanbaev, Arystan & Dikhanbaev, Bayandy & Mergalimova, Almagul & Georgiev, Aleksandar, 2023. "Development of a technology for the production of hydrogen-enriched synthesis gas with waste-free processing of Ekibastuz coal," Energy, Elsevier, vol. 278(PA).

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