Sodium/Na β″ Alumina Interface: Effect of Pressure on Voids

Dominic Spencer Jolly; Ziyang Ning; James E. Darnbrough; Jitti Kasemchainan; Gareth O. Hartley; Paul Adamson; David E.J. Armstrong; James Marrow; Peter G. Bruce

doi:10.1021/acsami.9b17786

Sodium/Na β″ Alumina Interface: Effect of Pressure on Voids

Dominic Spencer Jolly, Ziyang Ning, James E. Darnbrough, Jitti Kasemchainan, Gareth O. Hartley, Paul Adamson, David E.J. Armstrong, James Marrow, Peter G. Bruce^*

^*Corresponding author for this work

Metallurgy and Materials

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

Abstract

Three-electrode studies coupled with tomographic imaging of the Na/Na-β″-alumina interface reveal that voids form in the Na metal at the interface on stripping and they accumulate on cycling, leading to increasing interfacial current density, dendrite formation on plating, short circuit, and cell failure. The process occurs above a critical current for stripping (CCS) for a given stack pressure, which sets the upper limit on current density that avoids cell failure, in line with results for the Li/solid-electrolyte interface. The pressure required to avoid cell failure varies linearly with current density, indicating that Na creep rather than diffusion per se dominates Na transport to the interface and that significant pressures are required to prevent cell death, >9 MPa at 2.5

Original language	English
Pages (from-to)	678-685
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	12
Issue number	1
DOIs	https://doi.org/10.1021/acsami.9b17786
Publication status	Published - 8 Jan 2020

Bibliographical note

Funding Information:
P.G.B. is indebted to the Engineering and Physical Sciences Research Council (EPSRC), including the SUPERGEN Energy Storage Hub [EP/L019469/1], Enabling Next Generation Lithium Batteries [EP/M009521/1], Henry Royce Institute for Advanced Materials [EP/R00661X/1, EP/S019367/1, EP/R010145/1] and the Faraday Institution All-Solid-State Batteries with Li and Na Anodes [FIRG007, FIRG008] for financial support. The X-ray tomography facilities were funded by EPSRC Grant [EP/M02833X/1] “University of Oxford: experimental equipment upgrade”. The authors thank Dr. Phil Holdway, Oxford Materials Characterization Service, for help with XPS measurements.

Publisher Copyright:
Copyright © 2019 American Chemical Society.

Keywords

interface
metal anode
pressure dependence
solid electrolyte
solid-state battery
X-ray tomography

ASJC Scopus subject areas

General Materials Science

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10.1021/acsami.9b17786

Cite this

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title = "Sodium/Na β″ Alumina Interface: Effect of Pressure on Voids",

abstract = "Three-electrode studies coupled with tomographic imaging of the Na/Na-β″-alumina interface reveal that voids form in the Na metal at the interface on stripping and they accumulate on cycling, leading to increasing interfacial current density, dendrite formation on plating, short circuit, and cell failure. The process occurs above a critical current for stripping (CCS) for a given stack pressure, which sets the upper limit on current density that avoids cell failure, in line with results for the Li/solid-electrolyte interface. The pressure required to avoid cell failure varies linearly with current density, indicating that Na creep rather than diffusion per se dominates Na transport to the interface and that significant pressures are required to prevent cell death, >9 MPa at 2.5",

keywords = "interface, metal anode, pressure dependence, solid electrolyte, solid-state battery, X-ray tomography",

author = "{Spencer Jolly}, Dominic and Ziyang Ning and Darnbrough, {James E.} and Jitti Kasemchainan and Hartley, {Gareth O.} and Paul Adamson and Armstrong, {David E.J.} and James Marrow and Bruce, {Peter G.}",

note = "Funding Information: P.G.B. is indebted to the Engineering and Physical Sciences Research Council (EPSRC), including the SUPERGEN Energy Storage Hub [EP/L019469/1], Enabling Next Generation Lithium Batteries [EP/M009521/1], Henry Royce Institute for Advanced Materials [EP/R00661X/1, EP/S019367/1, EP/R010145/1] and the Faraday Institution All-Solid-State Batteries with Li and Na Anodes [FIRG007, FIRG008] for financial support. The X-ray tomography facilities were funded by EPSRC Grant [EP/M02833X/1] “University of Oxford: experimental equipment upgrade”. The authors thank Dr. Phil Holdway, Oxford Materials Characterization Service, for help with XPS measurements. Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

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AU - Armstrong, David E.J.

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AU - Bruce, Peter G.

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Sodium/Na β″ Alumina Interface: Effect of Pressure on Voids

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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