Linear Polymer Cathode Materials for Highly Efficient Aqueous Zinc-Ion Batteries: Is the High Active Sites Density Necessary?

ABSTRACT: Recently, research on aqueous zinc-ion batteries (AZIBs) has always focused on improving the energy storage performance by increasing the number of active sites, particularly in designing organic/polymer materials with a high density of active sites. However, does a higher density of active sites necessarily induce enhanced energy storage performance? To verify this issue, we have designed two linear polymers, where TAPT-DHBQ contains an additional pair of active sites (carbonyl groups) compared to TABQ-DHBQ, with theoretical specific capacities of 545.26 and 379.14 mAh g^-1, respectively. Interestingly, the experimental results have deviated with the specific capacities of these polymers being comparable, measuring to be 325 mAh g^-1 (TABQ-DHBQ) and 280 mAh g^-1

SUBMITTER: Dai Y 

PROVIDER: S-EPMC12279229 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature