Poly(quinone-thiourea) with Improved Auxiliary Coordination Zn2+ Insertion/Extraction Positive Performance for Aqueous Zinc Ion Battery Cathodes

• DOI: 10.1021/acssuschemeng.1c05881
• Publication Date: 2021-12-27T16:42:33Z
• Authors: Chenxiao Guo; Yang Liu; Liqiu Wang; Dejie Kong; Jingmin Wang
• Keywords: 01 natural sciences; 0104 chemical sciences

Sustainable organic quinone-based polymers exhibit numerous promising advantages in cathode application, and suitable structure design is important to improve their electrochemical performances. In this work, a designed material of redox units linked by auxiliary coordination chains poly(quinone-thiourea) achieved used as for aqueous zinc ion batteries. The cell displays improved performances with maximum discharge specific capacity 211 mA h g–1 at 0.02 A long cycle performance 83% retention after 1000 cycles under 0.1 (118 initial capacity). Zn2+ storage mechanism through the ex situ XPS investigations proves that oxygen atoms phenol sulfur nitrogen thiourea group all contribute intercalation, which stabilizes capacity. FT-IR also supports quinone carbonyl Zn2+. Furtherly, groups acting sites can alleviate deposition on surface reversibility performance. Such structural expected be strategy developing high-performance materials multivalent