Structural Improvement of the Blatter Radical for High-Current Organic Batteries
Adrian Saal, Lada Elbinger, Kristin Schreyer, Xhesilda Fataj, Christian Friebe, Ulrich S. Schubert
Abstract
A shorter and more facile synthetic route for a cross-linked polymer based on the Blatter radical with a higher gravimetric capacity is presented. The material is processed in electrode films and characterized via cyclic voltammetry and galvanostatic experiments. Several electrolyte mixtures are investigated to identify optimal conditions for the new material. The electrodes are utilized as a cathode material vs activated carbon in coin cells, where high currents of up to 60 C are applied, with a capacity retention of 24% compared to 1 C. In long-term experiments, the material reveals a promising stability with a capacity retention of 99% after 1000 cycles at 5 C. A comparison with a previously reported Blatter radical-based electrode material is done to investigate the influence of the molecular structure on the battery performance.