Fig. 1: Hierarchical structure of the LiB. | Nature Communications

Fig. 1: Hierarchical structure of the LiB.

From: 3D microstructure design of lithium-ion battery electrodes assisted by X-ray nano-computed tomography and modelling

Fig. 1

a Volume rendering of the reconstructed cylindrical battery scanned by X-ray micro-CT (accelerating voltage 180 kV, exposure time 1 s and voxel size 12.9 μm). The metal shell (brown), top button (red), venting disk (green), crimp plate (pink), seal insulator (yellow) and current collector (blue) are shown, with a corner cut displaying the internal structure of the battery; b magnified virtual slice to show the periodic layered structure of the cell; c X-ray nano-CT image showing (from left to right) the graphite anode, polyolefin separator and NMC cathode; d SEM image showing the CBD morphology alongside the secondary NMC particles, wherein the crystallography of the primary particles is seen; e virtual slice of the reconstructed 3D electrode, showing a blurry phase comprising the CBD and micro-pores (white: active material particles; dark grey: macro-pores; light grey: blurry mixed phase of micro-pores and CBD). Inset image shows the higher resolution scan of the CBD phase; f macro-pores (blue) are highlighted and retained with the active particle in the dual-scan superimposition process; g the resultant full microstructure of the NMC cathode by X-ray CT. The scale bars in (a, b) represent 10 mm and 240 μm respectively, 10 μm in (c, d, e) and 2 μm in the inset of (e).

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