Carbon-free high-loading silicon anodes enabled by sulfide solid electrolytes

Paper

Abstract

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

Paper intelligence

Summary

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.

Key findings

Sulfide solid electrolytes enable stable operation of 99.9 wt% microsilicon anodes.
Continuous interfacial growth and irreversible lithium losses are eliminated.
High areal current density and wide operating temperature range are achieved.
Promising performance is attributed to desirable interfacial properties and chemomechanical behavior of lithium-silicon alloy.

Methods

Bulk and surface characterization.
Quantification of interfacial components.
Assembly and testing of microsilicon full cells.

Limitations

The abstract does not explicitly state limitations of the study.

Applications

Lithium-ion batteries
Electric vehicles
Portable electronics
Grid storage

Confidence100%

Discovery

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Source record

Publication metadata

Authors: 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
Published: Sep 23, 2021
Journal or venue: Science
DOI: 10.1126/science.abg7217
Paper type: journal article
Source: Openalex

DOI OpenAlex