Fig. 2: Characterization of the CNT@Si@C porous structure, particle swelling, and electrochemical performance. | Nature Communications

Fig. 2: Characterization of the CNT@Si@C porous structure, particle swelling, and electrochemical performance.

From: Hierarchical porous silicon structures with extraordinary mechanical strength as high-performance lithium-ion battery anodes

Fig. 2

a Cross-section SEM of a typical CNT@Si@C microsphere (scale bar = 1 µm). b Pore diameter distribution of CNT@Si@C from gas absorption. c–e In-situ TEM images of a CNT@Si@C particle at different lithiation states (scale bar = 0.5 µm). The unit of the numbers in figures is nm. f Volume expansion curve of the particle recorded during the lithiation process. g–h The selected area electron diffraction (SAED) patterns of CNT@Si@C at different lithiation states. j Long-term cycling of CNT@Si@C, nano-Si, and micro-Si. k Long-term cycling of CNT@Si@C at different mass loadings.

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