Mesocrystalline Li2FeSiO4 hollow discoids with an ordered single-crystal-like structure and highly exposed (001) facets have been successfully synthesized as a lithium-ion cathode. Li2FeSiO4@C mesocrystals display a near theoretical discharge capacity, superior rate capability and good cycling stability due to their unique structural features with a large surface area generated from the hollow mesocrystal structure and a shortened Li+ diffusion path along (001) exposed facets.
- Zhengping Ding
- Datong Zhang
- Weifeng Wei