TiO2 - and ZrO2 -coated nickel sulfide (NiS) were prepared for the improvement of cycle capability in rechargeable lithium batteries with liquid electrolytes. The cells with the TiO2 -coated NiS showed improved cycle performance as compared with those of the noncoated NiS. This improvement was attributable to the improved structural reversibility of the active materials with Li+ insertion/extraction reactions, which might be due to the stabilization of the active materials by TiO2, and also attributable to the suppression of sulfur dissolution in the liquid electrolytes. ZrO2 coating on the NiS surface was not effective for improving the cyclability of the cells, which was attributable to the increase in the amount of metallic Ni clusters, not contributing to the electrochemical redox reactions, when charging.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry