LAUSR

Developing cathodes that can support high charge-discharge rates would improve the power density of lithium ion batteries. Herein, we report the development of high power cathodes, without sacrificing energy density. N,N '-Diphenyl phenazine was identified as a promising charge storage center by electrochemical studies due to its reversible, fast electron transfer at high potentials. By incorporating the phenazine redox units in a cross-linked network, a high capacity (223 mAh/g), high voltage (3.45 V vs Li/Li + ) cathode material was achieved. Optimized cross-linked materials are able to deliver reversible capacities as high as 220 mAh g -1 at 120 C with minimal degradation over 1000 cycles. The work presented here highlights the fast ionic transport and rate capabilities of amorphous, organic materials and demonstrates their potential as high energy and power density materials for next generation electrical energy storage technologies.