Investigating the evolving microstructure of lithium metal electrodes in 3D using X-ray computed tomography

被引：57

作者：

Taiwo, O. O. ^{[1
]}

Finegan, D. P. ^{[1
]}

Paz-Garcia, J. M. ^{[3
]}

Eastwood, D. S. ^{[4
,5
]}

Bodey, A. J. ^{[6
]}

Rau, C. ^{[6
]}

Hall, S. A. ^{[2
]}

Brett, D. J. L. ^{[1
]}

Lee, P. D. ^{[4
,5
]}

Shearing, P. R. ^{[1
]}

机构：

[1] UCL, Dept Chem Engn, Electrochem Innovat Lab, Torrington Pl, London WC1E 7JE, England

[2] Lund Univ, Div Solid Mech, Lund, Sweden

[3] Univ Malaga, Fac Sci, Dept Chem Engn, Malaga, Spain

[4] Manchester Xray Imaging Facil, Res Complex, Didcot OX11 0DE, Oxon, England

[5] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs, England

[6] Diamond Light Source, Didcot OX11 0FA, Oxon, England

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2017年 / 19卷 / 33期

基金：

英国工程与自然科学研究理事会;

关键词：

IN-SITU; GAMMA-RADIATION; MORPHOLOGY; MICROSCOPY; BATTERIES; GROWTH; VISUALIZATION; ELECTROLYTES; MECHANISMS; LITHIATION;

D O I：

10.1039/c7cp02872e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The growth of electrodeposited lithium microstructures on metallic lithium electrodes has prevented their use in rechargeable lithium batteries due to early performance degradation and safety implications. Understanding the evolution of lithium microstructures during battery operation is crucial for the development of an effective and safe rechargeable lithium-metal battery. This study employs both synchrotron and laboratory X-ray computed tomography to investigate the morphological evolution of the surface of metallic lithium electrodes during a single cell discharge and over numerous cycles, respectively. The formation of surface pits and the growth of mossy lithium deposits through the separator layer are characterised in three-dimensions. This has provided insight into the microstructural evolution of lithium-metal electrodes during rechargeable battery operation, and further understanding of the importance of separator architecture in mitigating lithium dendrite growth.

引用

页码：22111 / 22120

页数：10

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