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

Journal Article · · Nature Communications
 [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)

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.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1543299
Report Number(s):
PNNL-SA-144155
Journal Information:
Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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Cited By (2)

Room‐Temperature Crosslinkable Natural Polymer Binder for High‐Rate and Stable Silicon Anodes journal December 2019
Silicon: toward eco-friendly reduction techniques for lithium-ion battery applications journal January 2019

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