Darren H. S. Tan; Yu‐Ting Chen; Hedi Yang; Wurigumula Bao; Bhagath Sreenarayanan; Jean‐Marie Doux; Weikang Li; Bingyu Lu; So‐Yeon Ham; Baharak Sayahpour; Jonathan Scharf; Erik A. Wu; Grayson Deysher; Hyea Eun Han; Hoe Jin Hah; Hyeri Jeong; Jeong Beom Lee; Zheng Chen; Ying Shirley Meng · 2021 · Science
Paper
The development of silicon anodes for lithium-ion batteries has been largely impeded by poor interfacial stability against liquid electrolytes. Here, we enabled the stable operation of a 99.9 weight % microsilicon anode by using the interface passivating properties of sulfide solid electrolytes. Bulk and surface characterization, and quantification of interfacial components, showed that such an approach eliminates continuous interfacial growth and irreversible lithium losses. Microsilicon full cells were assembled and found to achieve high areal current density, wide operating temperature range, and high areal loadings for the different cells. The promising performance can be attributed to both the desirable interfacial property between microsilicon and sulfide electrolytes and the distinctive chemomechanical behavior of the lithium-silicon alloy.
Analysis
This paper demonstrates a stable, high-loading silicon anode for lithium-ion batteries by utilizing the interfacial passivation properties of sulfide solid electrolytes, overcoming limitations of liquid electrolytes.
Discovery
Thomas Schmaltz; Felix Hartmann; Tim Wicke; Lukas Weymann; Christoph Neef; Jürgen Janek
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Kaiyong Tuo; Chunwen Sun; Shuqin Liu
Yoshiaki Tanaka; Koki Ueno; Keita Mizuno; Kaori Takeuchi; Tetsuya Asano; Akihiro Sakai
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