One-Step Synthesis of Na-Sn Alloy with Internal 3D Na15Sn4Support for Fast and Stable Na Metal Batteries

Olusola John Dahunsi; Bomin Li; Siyuan Gao; Ke Lu; Fan Xia; Tao Xu; Yingwen Cheng

doi:10.1021/acsaem.1c03208

One-Step Synthesis of Na-Sn Alloy with Internal 3D Na₁₅Sn₄Support for Fast and Stable Na Metal Batteries

Olusola John Dahunsi, Bomin Li, Siyuan Gao, Ke Lu, Fan Xia, Tao Xu, Yingwen Cheng

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Na metal batteries are promising next-generation batteries but are constrained by the high reactivity of metallic Na. Here, we address this challenge by using a one-step-synthesized Na-Sn alloy anode with 1.6 at. % Sn. This anode has interconnected and sodiophilic Na15Sn4 backbones, which structurally support Na, enable faster Na+/Na redox kinetics, and guide dendrite-free Na plating with more stable solid-electrolyte interfaces. The composite Na@Na15Sn4 anode enabled very stable cycling of symmetric cells even at 5.0 mA cm-2 and improved the stability of full cells coupled with 3.0 mAh cm-2 Na3V2(PO4)3 cathodes to >90% capacity retention for 300 cycles.

Original language	English
Pages (from-to)	20-26
Number of pages	7
Journal	ACS Applied Energy Materials
Volume	5
Issue number	1
DOIs	https://doi.org/10.1021/acsaem.1c03208
State	Published - Jan 24 2022
Externally published	Yes

Funding

This work was supported by startup funds from Northern Illinois University. Use of the Center for Nanoscale Materials, an Office of Science user facility, was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract DE-AC02-06CH11357.

Funders	Funder number
U.S. Department of Energy
Office of Science
Basic Energy Sciences	DE-AC02-06CH11357
Northern Illinois University

Keywords

alloy anode
anode protection
beyond Li ion
composite anode
Na metal batteries
Na-Sn

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsaem.1c03208

Cite this

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abstract = "Na metal batteries are promising next-generation batteries but are constrained by the high reactivity of metallic Na. Here, we address this challenge by using a one-step-synthesized Na-Sn alloy anode with 1.6 at. % Sn. This anode has interconnected and sodiophilic Na15Sn4 backbones, which structurally support Na, enable faster Na+/Na redox kinetics, and guide dendrite-free Na plating with more stable solid-electrolyte interfaces. The composite Na@Na15Sn4 anode enabled very stable cycling of symmetric cells even at 5.0 mA cm-2 and improved the stability of full cells coupled with 3.0 mAh cm-2 Na3V2(PO4)3 cathodes to >90% capacity retention for 300 cycles.",

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AU - Dahunsi, Olusola John

AU - Li, Bomin

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AU - Lu, Ke

AU - Xia, Fan

AU - Xu, Tao

AU - Cheng, Yingwen

PY - 2022/1/24

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AB - Na metal batteries are promising next-generation batteries but are constrained by the high reactivity of metallic Na. Here, we address this challenge by using a one-step-synthesized Na-Sn alloy anode with 1.6 at. % Sn. This anode has interconnected and sodiophilic Na15Sn4 backbones, which structurally support Na, enable faster Na+/Na redox kinetics, and guide dendrite-free Na plating with more stable solid-electrolyte interfaces. The composite Na@Na15Sn4 anode enabled very stable cycling of symmetric cells even at 5.0 mA cm-2 and improved the stability of full cells coupled with 3.0 mAh cm-2 Na3V2(PO4)3 cathodes to >90% capacity retention for 300 cycles.

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