Correlative full field X-ray Compton scattering imaging and X-ray computed tomography for in situ observation of Li ion batteries

DOI: 10.1016/j.mtener.2022.101224

Authors: Chu Lun Alex Leung (University College London; Research Complex at Harwell) , Matthew D. Wilson (STFC-UKRI) , Thomas Connolley (Diamond Light Source) , Stephen P. Collins (Diamond Light Source) , Oxana V. Magdysyuk (Diamond Light Source) , Matthieu N. Boone (Ghent University) , Kosuke Suzuki (Gunma University) , Matthew C. Veale (University College London) , Enzo Liotti (University of Oxford) , Frederic Van Assche (Ghent University) , Andrew Lui (University of Oxford) , Chun Huang (Imperial College London; The Faraday Institution; Research Complex at Harwell; University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Materials Today Energy , VOL 306

State: Published (Approved)
Published: December 2022
Diamond Proposal Number(s): 23400

Abstract: Increasing electrode thickness is gaining more attention as a potential route to increase energy density for Li ion batteries although the realizable capacity and rate capability are usually limited by Li+ ion diffusion during (dis)charge, especially at increased (dis)charge rates. It remains challenging to visualize and quantify the low atomic number Li+ chemical stoichiometry distribution inside the electrode within commercially standard battery geometry, e.g., coin cells with stainless steel casings. Here, we map the distribution of Li+ chemical stoichiometry in the electrode microstructure inside a working coin cell battery to show the amount of electrode materials contributing to energy storage performance using innovative in situ correlative full-field X-ray Compton scattering imaging (XCS-I) and X-ray computed tomography (XCT). We design and fabricate an ultra-thick (∼1 mm) cathode of LiNi0.8Mn0.1Co0.1O2 with a microstructure containing vertically oriented pore arrays using a directional ice templating method. This novel technique paves a new way to map low atomic number elements in 3D structures and study how the microstructure improves Li+ ion diffusivity and energy storage performance.

Journal Keywords: electrode design; thick electrodes; directional ice templating; correlative imaging; X-ray Compton scattering

Diamond Keywords: Batteries; Lithium-ion

Subject Areas: Materials, Energy, Chemistry


Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Added On: 12/12/2022 09:39

Documents:
1-s2.0-S2468606922002829-main.pdf

Discipline Tags:

Energy Storage Energy Physical Chemistry Energy Materials Chemistry Materials Science

Technical Tags:

Imaging Tomography