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

Abstract

Alloy materials have been emerged to achieve compatible properties in various applications. The structural manipulation, however, requires sensitive and complicated synthetic process. Herein, we report atomic-scale combination of germanium-zinc distorted alloy exhibiting uncertain eutectic point in a phase diagram can imply a great potential to form atomically collaborated array via a simple fabrication method. When interconnected together, it prevents a fatal sublimation of germanium/germanium oxide during gas-solid phase reduction reaction and allows outstanding electronic conductivity as well as high available capacity in lithium-ion batteries, leading to structural and electrochemical evolution of germanium/zinc distorted array. Further, the unique features are clearly confirmed through in situ analysis. Besides, as-prepared battery anodes remarkably highlights outstanding rate capabilities (capacity retention of ~50% at 20 C compared to 0.2 C-rate) and cycle retention (73% at 3.0 C-rate) with a capacity of 546 mAh g -1 even after 1000 cycles. Even when assembled in a full cell, it notably facilitates considerable energy density during 400 cycles with 99.4% of average coulombic efficiency, which is suitable for a large-scale energy storage system.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [4];  [1]; ORCiD logo [5];  [5]; ORCiD logo [1];  [5];  [1]; ORCiD logo [4]; ORCiD logo [3];  [5]
  1. Ulsan National Institute of Science and Technology (UNIST), Ulsan (Republic of Korea)
  2. Korea Advanced Institute of Science and Technology, Daejeon (Republic of Korea)
  3. Korea Institute of Industrial Technology, Jeju-do (Republic of Korea)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  5. Pohang Univ. of Science and Technology (POSTECH), Pohang (Republic of Korea)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1543296
Report Number(s):
PNNL-SA-135597
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Song, Gyujin, Cheong, Jun Young, Kim, Chanhoon, Luo, Langli, Hwang, Chihyun, Choi, Sungho, Ryu, Jaegeon, Kim, Sungho, Song, Woo -Jin, Song, Hyun -Kon, Wang, Chongmin, Kim, Il -Doo, and Park, Soojin. Atomic-scale combination of germanium-zinc nanofibers for structural and electrochemical evolution. United States: N. p., 2019. Web. doi:10.1038/s41467-019-10305-x.
Song, Gyujin, Cheong, Jun Young, Kim, Chanhoon, Luo, Langli, Hwang, Chihyun, Choi, Sungho, Ryu, Jaegeon, Kim, Sungho, Song, Woo -Jin, Song, Hyun -Kon, Wang, Chongmin, Kim, Il -Doo, & Park, Soojin. Atomic-scale combination of germanium-zinc nanofibers for structural and electrochemical evolution. United States. doi:10.1038/s41467-019-10305-x.
Song, Gyujin, Cheong, Jun Young, Kim, Chanhoon, Luo, Langli, Hwang, Chihyun, Choi, Sungho, Ryu, Jaegeon, Kim, Sungho, Song, Woo -Jin, Song, Hyun -Kon, Wang, Chongmin, Kim, Il -Doo, and Park, Soojin. Thu . "Atomic-scale combination of germanium-zinc nanofibers for structural and electrochemical evolution". United States. doi:10.1038/s41467-019-10305-x. https://www.osti.gov/servlets/purl/1543296.
@article{osti_1543296,
title = {Atomic-scale combination of germanium-zinc nanofibers for structural and electrochemical evolution},
author = {Song, Gyujin and Cheong, Jun Young and Kim, Chanhoon and Luo, Langli and Hwang, Chihyun and Choi, Sungho and Ryu, Jaegeon and Kim, Sungho and Song, Woo -Jin and Song, Hyun -Kon and Wang, Chongmin and Kim, Il -Doo and Park, Soojin},
abstractNote = {Alloy materials have been emerged to achieve compatible properties in various applications. The structural manipulation, however, requires sensitive and complicated synthetic process. Herein, we report atomic-scale combination of germanium-zinc distorted alloy exhibiting uncertain eutectic point in a phase diagram can imply a great potential to form atomically collaborated array via a simple fabrication method. When interconnected together, it prevents a fatal sublimation of germanium/germanium oxide during gas-solid phase reduction reaction and allows outstanding electronic conductivity as well as high available capacity in lithium-ion batteries, leading to structural and electrochemical evolution of germanium/zinc distorted array. Further, the unique features are clearly confirmed through in situ analysis. Besides, as-prepared battery anodes remarkably highlights outstanding rate capabilities (capacity retention of ~50% at 20 C compared to 0.2 C-rate) and cycle retention (73% at 3.0 C-rate) with a capacity of 546 mAh g-1 even after 1000 cycles. Even when assembled in a full cell, it notably facilitates considerable energy density during 400 cycles with 99.4% of average coulombic efficiency, which is suitable for a large-scale energy storage system.},
doi = {10.1038/s41467-019-10305-x},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {5}
}

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Works referenced in this record:

Nanostructured materials for advanced energy conversion and storage devices
journal, May 2005

  • Aricò, Antonino Salvatore; Bruce, Peter; Scrosati, Bruno
  • Nature Materials, Vol. 4, Issue 5, p. 366-377
  • DOI: 10.1038/nmat1368