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3D Correlative Imaging of Lithium Ion Concentration in a Vertically Oriented Electrode Microstructure with a Density Gradient.


ABSTRACT: The performance of Li+ ion batteries (LIBs) is hindered by steep Li+ ion concentration gradients in the electrodes. Although thick electrodes (≥300 µm) have the potential for reducing the proportion of inactive components inside LIBs and increasing battery energy density, the Li+ ion concentration gradient problem is exacerbated. Most understanding of Li+ ion diffusion in the electrodes is based on computational modeling because of the low atomic number (Z) of Li. There are few experimental methods to visualize Li+ ion concentration distribution of the electrode within a battery of typical configurations, for example, coin cells with stainless steel casing. Here, for the first time, an interrupted in situ correlative imaging technique is developed, combining novel, full-field X-ray Compton scattering imaging with X-ray computed tomography that allows 3D pixel-by-pixel mapping of both Li+ stoichiometry and electrode microstructure of a LiNi0.8 Mn0.1 Co0.1 O2 cathode to correlate the chemical and physical properties of the electrode inside a working coin cell battery. An electrode microstructure containing vertically oriented pore arrays and a density gradient is fabricated. It is shown how the designed electrode microstructure improves Li+ ion diffusivity, homogenizes Li+ ion concentration through the ultra-thick electrode (1 mm), and improves utilization of electrode active materials.

SUBMITTER: Huang C 

PROVIDER: S-EPMC9165496 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature

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3D Correlative Imaging of Lithium Ion Concentration in a Vertically Oriented Electrode Microstructure with a Density Gradient.

Huang Chun C   Wilson Matthew D MD   Suzuki Kosuke K   Liotti Enzo E   Connolley Thomas T   Magdysyuk Oxana V OV   Collins Stephen S   Van Assche Frederic F   Boone Matthieu N MN   Veale Matthew C MC   Lui Andrew A   Wheater Rhian-Mair RM   Leung Chu Lun Alex CLA  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20220411 16


The performance of Li<sup>+</sup> ion batteries (LIBs) is hindered by steep Li<sup>+</sup> ion concentration gradients in the electrodes. Although thick electrodes (≥300 µm) have the potential for reducing the proportion of inactive components inside LIBs and increasing battery energy density, the Li<sup>+</sup> ion concentration gradient problem is exacerbated. Most understanding of Li<sup>+</sup> ion diffusion in the electrodes is based on computational modeling because of the low atomic numbe  ...[more]

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