Tomographical analysis of electrochemical lithiation and delithiation of LiNi0.6Co0.2Mn0.2O2 cathodes in all-solid-state batteries

Title
Tomographical analysis of electrochemical lithiation and delithiation of LiNi0.6Co0.2Mn0.2O2 cathodes in all-solid-state batteries
Authors
김형철손지원정경윤정훈기윤빈나최성준정으뜸김태현상병인
Keywords
atom probe tomography; lithiation; delithiation; all-solid-state battery; cathode active material
Issue Date
2019-05
Publisher
Scripta materialia
Citation
VOL 165-14
Abstract
We demonstrated the use of three-dimensional (3D) atom-probe tomography (APT) for analyzing the electrochemical lithiation/delithiation in the composite cathodes of all-solid-state batteries (ASSBs). 3D APT provides direct determination of the Li-ion contents, having difficult by X-ray excitation. Compared with various cathodes, they showed a significant variation in the Li-ion concentration during lithiation/delithiation because of the poor solid-to-solid interfaces, which is an inherent problem in ASSBs. In addition, the loss of transition-metal content was quantitatively verified. We have confirmed that our APT can be effectively applied to ASSB systems and it would be provide a deeper understanding of electrochemistry in ASSBs.
URI
http://pubs.kist.re.kr/handle/201004/69157
ISSN
1359-6462
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KIST Publication > Article
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