期刊
JOURNAL OF APPLIED CRYSTALLOGRAPHY
卷 49, 期 -, 页码 1665-1673出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1600576716012632
关键词
in situ X-ray electrochemical cells; energy storage; batteries; capacitors; spatial resolution
资金
- NorthEast Center for Chemical Energy Storage (NECCES), an Energy Frontier Research Center - US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0012583]
- DOE Office of Science [DE-AC02-06CH11357]
- Gonville and Caius College
- University of Cambridge
A tubular operando electrochemical cell has been developed to allow spatially resolved X-ray scattering and spectroscopic measurements of individual cell components, or regions thereof, during device operation. These measurements are enabled by the tubular cell geometry, wherein the X-ray-transparent tube walls allow radial access for the incident and scattered/transmitted X-ray beam; by probing different depths within the electrode stack, the transformation of different components or regions can be resolved. The cell is compatible with a variety of synchrotron-based scattering, absorption and imaging methodologies. The reliability of the electrochemical cell and the quality of the resulting X-ray scattering and spectroscopic data are demonstrated for two types of energy storage: the evolution of the distribution of the state of charge of an Li-ion battery electrode during cycling is documented using X-ray powder diffraction, and the redistribution of ions between two porous carbon electrodes in an electrochemical double-layer capacitor is documented using X-ray absorption near-edge spectroscopy.
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