The electrochemical performance of high capacity x Li2 MnO 3 · (1-x) LiMO2 (M=Ni,Co,Mn) cathodes was evaluated in a lithium-ion cell configuration against Li4 Ti5 O12 - and carbon-encapsulated anatase, TiO2 -C, anodes. The electrode composition 0.5 Li2 MnO3 0.5 LiNi0.44 Mn0.31 Co0.25 O 2 that provides a rechargeable capacity of 250 mAh/g was selected for the study. Li4 Ti5 O12 /0.5 Li2 MnO3 ·0.5 LiNi0.44 Mn0.31 Co 0.25 O2 cells operate with excellent reversibility, offering a superior energy density to Li4 Ti5 O 12/ Li1+x Mn2-x O4 (spinel/spinel) cells that are being developed for powering hybrid and plug-in hybrid (10 mile) vehicles. Carbon encapsulation of anatase TiO2 did not improve the stability or cycle life of Lix TiO2 electrodes for x> 0.5; TiO2 -C/0.5 Li2 MnO3 · 0.5 LiNi0.44 Mn0.31 Co0.25 O2 cells steadily lose capacity on electrochemical cycling.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Surfaces, Coatings and Films
- Renewable Energy, Sustainability and the Environment
- Condensed Matter Physics