Organic radical polymers are promising cathode materials for next-generation batteries because of their rapid charge transfer and high cycling stability. However, these organic polymer electrodes gradually dissolve in the electrolyte, resulting in capacity fade. Several crosslinking methods have been developed to improve the performance of these electrodes, but they are either not compatible with carbon additives or compromise the solution processability of the electrodes. A one-step post-synthetic, carbon-compatible crosslinking method was developed to effectively crosslink an organic polymer electrode and allow for easy solution processing. The highest electrode capacity of 104mAhg-1 (vs. a theoretical capacity of 111mAhg-1 ) is achieved by introducing 1mol% of the crosslinker, whereas the highest capacity retention (99.6%) is obtained with 3mol% crosslinker. In addition, mass transfer was observed insitu by using electrochemical quartz crystal microbalance with dissipation monitoring. These results may guide future electrode design toward fast-charging and high-capacity organic electrodes.
