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Title: Non-destructive measurement of in-operando lithium concentration in batteries via x-ray Compton scattering

Non-destructive determination of lithium distribution in a working battery is key for addressing both efficiency and safety issues. Although various techniques have been developed to map the lithium distribution in electrodes, these methods are mostly applicable to test cells. Here, we propose the use of high-energy x-ray Compton scattering spectroscopy to measure the local lithium concentration in closed electrochemical cells. A combination of experimental measurements and parallel first-principles computations is used to show that the shape parameter S of the Compton profile is linearly proportional to lithium concentration and thus provides a viable descriptor for this important quantity. The merits and applicability of our method are demonstrated with illustrative examples of Li{sub x}Mn{sub 2}O{sub 4} cathodes and a working commercial lithium coin battery CR2032.
Authors:
;  [1] ; ; ;  [2] ; ; ;  [3] ;  [2] ;  [4] ; ;  [5] ;  [2] ;  [6]
  1. Faculty of Science and Technology, Gunma University, Kiryu, Gunma 376-8515 (Japan)
  2. Department of Physics, Northeastern University, Boston, Massachusetts 02115 (United States)
  3. Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501 (Japan)
  4. (Poland)
  5. Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Sayo, Hyogo 679-5198 (Japan)
  6. (United States)
Publication Date:
OSTI Identifier:
22494904
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 119; Journal Issue: 2; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CATHODES; COMPTON EFFECT; CONCENTRATION RATIO; EFFICIENCY; ELECTROCHEMICAL CELLS; LITHIUM; SPECTROSCOPY; X RADIATION