Rigid TiO_2-x coated mesoporous hollow Si nanospheres with high structure stability for lithium-ion battery anodes.

ABSTRACT: Rigid oxygen-deficient TiO_2-x coated mesoporous hollow Si nanospheres with a mechanically and electrically robust structure have been constructed through a facile method for high-performance Li-ion battery anodes. The mesoporous hollow structure provides enough inner void space for the expansion of Si. The oxygen-deficient TiO_2-x coating has functions in three aspects: (1) avoiding direct contact between Si and the electrolyte; (2) suppressing the outward expansion of the mesoporous hollow Si nanospheres; (3) improving the conductivity of the composite. The combined effect leads to high interfacial stability and structural integrity of both the material nanoparticles and the whole electrode. By virtue of the rational design, the composite yields a high r

SUBMITTER: Yu Y 

PROVIDER: S-EPMC9080017 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature