For organic redox polymers in particular, hydrophobicity has been a barrier. Like other polymer materials, they also present challenges when it comes to decomposition and recycling. Now, a research team from Tohoku University, working in collaboration with NITTO BOSEKI CO., LTD., has developed a new organic redox polymer that addresses these long-standing challenges. To overcome the hurdles, the team introduced p-dihydroxybenzene - an organic molecule with high charge storage capacity - into a polyamine, which is water-soluble due to its positive charge. "By combining high charge storage capacity with recyclability, we can open new directions for sustainable battery research."