Details

Autor(en) / Beteiligte

• Guo, Chenxiao
• Liu, Yang
• Zhang, Jiaxin
• Zhao, Wenjie
• Wang, Kangjia
• Su, Mengyu
• Hu, Yajie
• Wang, Liqiu

Titel

Poly(quinone-1,4-diaminoanthraquinone) cathodes for stable Zn2+ storage in aqueous zinc-ion batteries

Ist Teil von

• Ionics, 2023-06, Vol.29 (6), p.2319-2328

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2023

Link zum Volltext

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• Organic cathode materials have attracted much attention owing to their sustainability and structure designability. However, the structural design of high electrochemical-performance organic cathode in aqueous zinc-ion batteries (AZIBs) still needs further development. Herein, we propose poly(quinone-1,4-diaminoanthraquinone) (PQN14) as the cathode to stabilize Zn 2+ storage based on the configuration suitability of chelating C = O units and N atoms along large conjugated chains. PQN14 exhibits a specific discharge capacity of 158 mAh g −1 at 0.02 A g −1 and has a 75% capacity retention after 400 cycles. Even at 0.1 A g −1 , it exhibits a 72% capacity retention after 1000 cycles. Redox kinetics analysis indicates that PQN14 exhibits efficient capacitive and ion diffusion controlled behaviors. The Zn 2+ storage mechanism of PQN14 is investigated via ex-situ X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy, which indicates that the moderate active site configuration in PQN14 is conducive to coordination with Zn 2+ . The active site configuration involves all carbonyl groups and N atoms to realize stable Zn 2+ insertion. This approach, which tunes the configuration to afford high electrochemical performance, may provide a progressive perspective for developing organic cathode materials for AZIBs. Graphical Abstract