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Title: Finding a Needle in the Haystack: Identification of Functionally Important Minority Phases in an Operating Battery

Journal Article · · Nano Letters
 [1];  [2];  [3];  [4];  [2];  [4]; ORCiD logo [5];  [5];  [2]; ORCiD logo [2]; ORCiD logo [5]; ORCiD logo [2]
  1. Chinese Academy of Sciences (CAS), Beijing (China); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); Chinese Academy of Sciences (CAS), Beijing (China)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Chinese Academy of Sciences (CAS), Beijing (China)

The in-depth understanding of the minority phases’ roles in functional materials, e.g., batteries, is critical for optimizing the system performance and the operational efficiency. Although the visualization of battery electrode under operating conditions has been demonstrated, the development of advanced data-mining approaches is still needed in order to identify minority phases and to understand their functionalities. The present study uses nanoscale X-ray spectromicroscopy to study a functional LiCoO2/Li battery pouch cell. The data-mining approaches developed herein were used to search through over 10 million X-ray absorption spectra that cover more than 100 active cathode particles. Two particles with unanticipated chemical fingerprints were identified and further analyzed, providing direct evidence and valuable insight into the undesired side reactions involving the cation dissolution and precipitation as well as the local overlithiation-caused subparticle domain deactivation. As a result, the data-mining approach described in this work is widely applicable to many other structurally complex and chemically heterogeneous systems, in which the secondary/minority phases could critically affect the overall performance of the system, well beyond battery research.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
SC0012704
OSTI ID:
1409510
Report Number(s):
BNL-114560-2017-JA; R&D Project: MA453MAEA; VT1201000; TRN: US1703198
Journal Information:
Nano Letters, Vol. 17, Issue 12; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (6)

Quantification of Heterogeneous Degradation in Li‐Ion Batteries journal May 2019
Analysis on the constant-current overcharge electrode process and self-protection mechanism of LiCoO2/graphite batteries journal November 2018
Data mining for better material synthesis: The case of pulsed laser deposition of complex oxides journal March 2018
High‐Voltage Charging‐Induced Strain, Heterogeneity, and Micro‐Cracks in Secondary Particles of a Nickel‐Rich Layered Cathode Material journal March 2019
Synchrotron Big Data Science journal September 2018
Data Mining for better material synthesis: the case of pulsed laser deposition of complex oxides text January 2017