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Title: Infinitesimal sulfur fusion yields quasi-metallic bulk silicon for stable and fast energy storage

Abstract

A fast-charging battery that supplies the maximum energy is a key element for vehicle electrification. High-capacity silicon anodes offer a viable alternative to carbonaceous materials, but they are vulnerable to fracture due to large volumetric changes during charge–discharge cycles. The low ionic and electronic transport across the silicon particles limits the charging rate of batteries. Herein, as a three-in-one solution for the above issues, we show that small amounts of sulfur doping (<1 at%) render quasi-metallic silicon microparticles by substitutional doping and increase lithium ion conductivity through the flexible and robust self-supporting channels as demonstrated by microscopy observation and theoretical calculations. Such unusual doping characters are enabled by simultaneous bottom-up assembly of dopants and silicon at the seed level in molten salts medium. Furthermore this sulfur-doped silicon anode shows highly stable battery cycling at a fast-charging rate at a high areal beyond those of a commercial standard anode.

Authors:
 [1];  [2]; ORCiD logo [2];  [2];  [2]; ORCiD logo [3];  [2];  [2];  [1]
  1. Pohang Univ. of Science and Technology (POSTECH), Pohang (Republic of Korea)
  2. Ulsan National Institute of Science and Technology (UNIST), Ulsan (Republic of Korea)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1543299
Report Number(s):
PNNL-SA-144155
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:
25 ENERGY STORAGE

Citation Formats

Ryu, Jaegeon, Seo, Ji Hui, Song, Gyujin, Choi, Keunsu, Hong, Dongki, Wang, Chongmin, Lee, Hosik, Lee, Jun Hee, and Park, Soojin. Infinitesimal sulfur fusion yields quasi-metallic bulk silicon for stable and fast energy storage. United States: N. p., 2019. Web. doi:10.1038/s41467-019-10289-8.
Ryu, Jaegeon, Seo, Ji Hui, Song, Gyujin, Choi, Keunsu, Hong, Dongki, Wang, Chongmin, Lee, Hosik, Lee, Jun Hee, & Park, Soojin. Infinitesimal sulfur fusion yields quasi-metallic bulk silicon for stable and fast energy storage. United States. doi:10.1038/s41467-019-10289-8.
Ryu, Jaegeon, Seo, Ji Hui, Song, Gyujin, Choi, Keunsu, Hong, Dongki, Wang, Chongmin, Lee, Hosik, Lee, Jun Hee, and Park, Soojin. Tue . "Infinitesimal sulfur fusion yields quasi-metallic bulk silicon for stable and fast energy storage". United States. doi:10.1038/s41467-019-10289-8. https://www.osti.gov/servlets/purl/1543299.
@article{osti_1543299,
title = {Infinitesimal sulfur fusion yields quasi-metallic bulk silicon for stable and fast energy storage},
author = {Ryu, Jaegeon and Seo, Ji Hui and Song, Gyujin and Choi, Keunsu and Hong, Dongki and Wang, Chongmin and Lee, Hosik and Lee, Jun Hee and Park, Soojin},
abstractNote = {A fast-charging battery that supplies the maximum energy is a key element for vehicle electrification. High-capacity silicon anodes offer a viable alternative to carbonaceous materials, but they are vulnerable to fracture due to large volumetric changes during charge–discharge cycles. The low ionic and electronic transport across the silicon particles limits the charging rate of batteries. Herein, as a three-in-one solution for the above issues, we show that small amounts of sulfur doping (<1 at%) render quasi-metallic silicon microparticles by substitutional doping and increase lithium ion conductivity through the flexible and robust self-supporting channels as demonstrated by microscopy observation and theoretical calculations. Such unusual doping characters are enabled by simultaneous bottom-up assembly of dopants and silicon at the seed level in molten salts medium. Furthermore this sulfur-doped silicon anode shows highly stable battery cycling at a fast-charging rate at a high areal beyond those of a commercial standard anode.},
doi = {10.1038/s41467-019-10289-8},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {5}
}

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