Evidence of Copper Separation in Lithiated Cu6Sn5 Lithium-Ion Battery Anodes

Xin F. Tan; Wenhui Yang; Kohei Aso; Syo Matsumura; Stuart D. McDonald; Kazuhiro Nogita

doi:10.1021/acsaem.9b02014

Evidence of Copper Separation in Lithiated Cu₆Sn₅ Lithium-Ion Battery Anodes

Xin F. Tan, Wenhui Yang, Kohei Aso, Syo Matsumura, Stuart D. McDonald, Kazuhiro Nogita

Quantum Sciences of Materials

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

9 Citations (Scopus)

Abstract

Intermetallics such as Cu₆Sn₅, NiSi₂, and CuGa₂ etc., are promising candidate materials to replace carbon-based lithium-ion battery anodes. However, the lithiation reactions of these anodes often involve the separation of the inactive phases, a slow process that retards the lithiation kinetics and deactivates their role as a stress buffer. This research visualizes the separated Cu in a lithiated Cu₆Sn₅ anode by advanced transmission electron microscopy techniques. Cu nanospheres of 3-4 nm are found homogeneously distributed in both Li_(13+y)Sn₅ and Li₁₃Cu₆Sn₅ phases, suggesting that Cu is transported by long-range diffusion from the reaction site at the Li_(13+y)Sn₅/Li₁₃Cu₆Sn₅ phase boundaries.

Original language	English
Pages (from-to)	141-145
Number of pages	5
Journal	ACS Applied Energy Materials
Volume	3
Issue number	1
DOIs	https://doi.org/10.1021/acsaem.9b02014
Publication status	Published - Jan 27 2020

All Science Journal Classification (ASJC) codes

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

UN SDGs

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

Access to Document

10.1021/acsaem.9b02014

Cite this

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title = "Evidence of Copper Separation in Lithiated Cu6Sn5 Lithium-Ion Battery Anodes",

abstract = "Intermetallics such as Cu6Sn5, NiSi2, and CuGa2 etc., are promising candidate materials to replace carbon-based lithium-ion battery anodes. However, the lithiation reactions of these anodes often involve the separation of the inactive phases, a slow process that retards the lithiation kinetics and deactivates their role as a stress buffer. This research visualizes the separated Cu in a lithiated Cu6Sn5 anode by advanced transmission electron microscopy techniques. Cu nanospheres of 3-4 nm are found homogeneously distributed in both Li(13+y)Sn5 and Li13Cu6Sn5 phases, suggesting that Cu is transported by long-range diffusion from the reaction site at the Li(13+y)Sn5/Li13Cu6Sn5 phase boundaries.",

author = "Tan, {Xin F.} and Wenhui Yang and Kohei Aso and Syo Matsumura and McDonald, {Stuart D.} and Kazuhiro Nogita",

year = "2020",

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T1 - Evidence of Copper Separation in Lithiated Cu6Sn5 Lithium-Ion Battery Anodes

AU - Tan, Xin F.

AU - Yang, Wenhui

AU - Aso, Kohei

AU - Matsumura, Syo

AU - McDonald, Stuart D.

AU - Nogita, Kazuhiro

PY - 2020/1/27

Y1 - 2020/1/27

N2 - Intermetallics such as Cu6Sn5, NiSi2, and CuGa2 etc., are promising candidate materials to replace carbon-based lithium-ion battery anodes. However, the lithiation reactions of these anodes often involve the separation of the inactive phases, a slow process that retards the lithiation kinetics and deactivates their role as a stress buffer. This research visualizes the separated Cu in a lithiated Cu6Sn5 anode by advanced transmission electron microscopy techniques. Cu nanospheres of 3-4 nm are found homogeneously distributed in both Li(13+y)Sn5 and Li13Cu6Sn5 phases, suggesting that Cu is transported by long-range diffusion from the reaction site at the Li(13+y)Sn5/Li13Cu6Sn5 phase boundaries.

AB - Intermetallics such as Cu6Sn5, NiSi2, and CuGa2 etc., are promising candidate materials to replace carbon-based lithium-ion battery anodes. However, the lithiation reactions of these anodes often involve the separation of the inactive phases, a slow process that retards the lithiation kinetics and deactivates their role as a stress buffer. This research visualizes the separated Cu in a lithiated Cu6Sn5 anode by advanced transmission electron microscopy techniques. Cu nanospheres of 3-4 nm are found homogeneously distributed in both Li(13+y)Sn5 and Li13Cu6Sn5 phases, suggesting that Cu is transported by long-range diffusion from the reaction site at the Li(13+y)Sn5/Li13Cu6Sn5 phase boundaries.

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