Education: Master's degree

Degree: Master

Status: Graduation

Thesis title: Research on the application of TiS3 nanosheets in lithium batteries and lithium-sulfur batteries

Research Direction: Lithium-ion battery anode

Graduation destination: Tianjin Lishen Co.

Introduction: TiH1.924 was prepared as a precursor by DC arc plasma evaporation method, and then TiS3 nanoparticles were obtained by a simple solid-gas reaction. The electrochemical properties of TiS3 nanomaterials as anode active material for lithium-ion batteries were investigated. And TiS3 was used as an additive compounded with conductive carbon black for improving the electrochemical performance of lithium-sulfur batteries. (1) The precursor is made by the DC arc method with a simple process, and the size of TiS3 can be well controlled by using TiH1.924 nanoparticles mixed with sulfur for heating, and the reaction time required is greatly reduced. (2) The precursor TiH1.924 and TiS3 materials were successfully prepared by the DC arc plasma method and subsequent sulfidation, and the test results showed that the TiS3 materials were disordered stacked nanosheets. (3) The electrochemical performance of TiS3 nanomaterials as anode active materials for lithium-ion batteries was investigated, and this material exhibited good electrochemical performance. (4) The adsorption effect of TiS3 on polysulfides was demonstrated by chemisorption experiments. After the addition of TiS3, the cycling stability of the battery was improved. It is demonstrated that the addition of TiS3 can alleviate the "shuttle effect" of lithium-sulfur batteries and improve their electrochemical performance.

Entrance date: 2019-09-01

Graduation date: 2022-06-30

Email: xl771544347@qq.com