Spinel Li4Ti5O12 has been considered as a promising alternative material to carbon anodes due to zero-strain or volume change during the charging and discharging. Furthermore, Li4Ti5O12 has an flat potential plateau at about 1.55V (vs. Li/Li+), potential problem of electrolyte decomposition is alleviated. However, the high power performance of Li4Ti5O12 is still limited by its inherent insulating character. One of methods for solving this problem is reduction of particle size. A one-pot template-free solvothermal synthesis of crystalline Li4Ti5O12 nanostructures based on the "benzyl alcohol route" is presented. The 1-2 μm sized nanostructured spherical particles are constituted of nanocrystallites in the size range of a few nm. The as synthesized crystalline nanostructures show good electrochemical performances at high rate and good cycling stability. Annealing the nanostructures improves the performance, which approaches the theoretical capacity of Li4Ti5O12 with no noticeably capacity loss.
ASJC Scopus subject areas
- Chemical Engineering(all)