High Performance Pillared Vanadium Oxide Cathode for Lithium Ion Batteries
ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
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Layered oxides such as LiCoO2 are widely used in the cathodes of lithium ion batteries but their mechanical and thermal properties can lead to safety and reliability e.g. cycle life challenges in particular for military vehicle applications. Stresses induced in oxide particles on repeated lithium insertion and extraction, for example, can cause mechanical fracture, a suspected contributor to capacity fade and resistance increases. We hypothesized that the incorporation of pillaring agents between the layers would reduce stresses caused by lithium insertion and enhance lithium diffusion thereby improving cycle-life, high rate capacities and resistance to thermal runaway. This presentation will describe our progress in preparation of the pillared materials, and characterization of their structural, compositional, electrochemical, thermal and mechanical characteristics.
- Electrochemical Energy Storage