Schematic diagram of the Li+ diffusion mechanism in bulk and mesoporous Li2TiSiO5 electrode (IMAGE)
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The mesopores can greatly facilitate the fast Li+ diffusion through short nanoscale diffusion lengths (5-10 nm), which is beneficial for improving the rate capability and cycling performance. Meanwhile, the existence of conductive carbon networks on the pore surface and single crystal features are beneficial for the fast electron transfer through the electrode. However, due to the micron-scale diffusion lengths (5-10 μm), bulk Li2TiSiO5 exhibits slow Li+ diffusion, resulting in poor rate and cycle performance.
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