π-Extended Dihydrophenazine-Based Polymeric Cathode Material for High-Performance Organic Batteries
Lewei Huang, Yuanyuan Chen, Yue Liu, Tingting Wu, Huamei Li, Jing Ye, Gaole Dai, Xiaohong Zhang, Yu Zhao
Abstract
Organic electrode materials have attracted widespread attention as alternative candidates for lithium-ion batteries due to their potential for sustainable production, wide source, low cost, and adjustability. Herein, we develop a dihydrophenazine-based multielectron redox center to promote the energy and power density of organic batteries. The poly(1,3,5-tris(10-(4-vinylphenyl)phenazin-5(10H)-yl)benzene) (p-TPZB)-based battery shows a specific discharge capacity of 155 mAh g–1 with a discharge voltage of 3.1–4.2 V (vs Li+/Li) initially. Until the 2000th cycle, the specific discharge capacity is still maintained up to 138 mAh g–1, with an excellent capacity retention rate of ca. 89% at 2C. Meanwhile, the p-TPZB|Li cell delivers outstanding power density and energy density up to 4320 W kg–1 and 522 Wh kg–1, respectively. Moreover, p-TPZB also has shown potential as an active material for sodium-ion batteries (SIBs). Our study provides a structure and strategy to improve the capacity and density of next-generation high-performance lithium/sodium-ion batteries.