Conjugated Azo Compounds as Active Materials for Rechargeable Sodium‐Metal Batteries with High‐Rate Performance. Issue 2 (29th December 2022)

• Record Type: Journal Article
• Authors: Wang, Jiawen; Tong, Yifan; Huang, Weiwei; Zhang, Qichun
• Is Part Of: Batteries & supercaps. Volume 6:Issue 2(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-29
• Subjects: anode materials -- azo-linked polymers -- electrochemical energy storage -- organic electrodes -- sodium-metal batteries; Electrochemistry -- Periodicals; Electrodes -- Periodicals; Electric batteries -- Periodicals; 621.31242
• DOI: 10.1002/batt.202200413
• Languages: English
• ISSNs: 2566-6223

Abstract

Abstract: Organic electrode materials have gained growing attention in the field of sodium‐metal batteries due to their rich reserves, flexibility, and environmental friendliness. However, organic small molecules suffer from poor stability in the electrolyte leading to the decay of battery capacity and reduced cycle life. To address these issues, we report a linear polymer p‐PADA with N=N and C=N as active centers. Its highly‐conjugated and polymerized structure endows the p‐PADA electrode stability, faster reaction kinetics, and exceptional rate performance. When the current density reaches 5 A g −1, p‐PADA still exhibits a specific capacity of 313 mAh g −1 after 1000 cycles. This work demonstrates that polymerization is an effective method to enhance the electrochemical properties of organic materials. Abstract : How conjugation helps ! The conjugated azo polymer p‐PADA overcomes the disadvantage of poor solubility and stability of azo small molecules, and exhibits excellent rate performance when applied as the electrode in sodium‐metal batteries.