Graphene oxide wrapped croconic acid disodium salt for sodium ion battery electrodes

• Published in: Journal of power sources Vol. 250; pp. 372 - 378
• Main Authors: Luo, Chao, Zhu, Yujie, Xu, Yunhua, Liu, Yihang, Gao, Tao, Wang, Jing, Wang, Chunsheng
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.03.2014; Elsevier
• Subjects: Applied sciences; Charge; Computer aided design; Croconic acid disodium salt; Direct energy conversion and energy accumulation; Dissolution; Electric batteries; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrodes; Exact sciences and technology; Graphene; Graphene oxide; Oxides; Particle pulverization; Sodium; Sodium ion batteries; Ultrasonic spray pyrolysis; Sodium ion batteries; Croconic acid disodium salt; Graphene oxide; Ultrasonic spray pyrolysis; Particle pulverization; Pyrolysis; Sodium-ion battery; Spray pyrolysis; Secondary cell; Spray coating; Electrodes; Particle; Ultrasonic nebulization
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2013.10.131

Croconic acid disodium salt (CADS), a renewable or recyclable organic compound, is investigated as an anode material in sodium ion battery for the first time. The pristine micro-sized CADS delivers a high capacity of 246.7 mAh g−1, but it suffers from fast capacity decay during charge/discharge cycles. The detailed investigation reveals that the severe capacity loss is mainly attributed to the pulverization of CADS particles induced by the large volume change during sodiation/desodiation rather than the generally believed dissolution of CADS in the organic electrolyte. Minimizing the particle size can effectively suppress the pulverization, thus improving the cycling stability. Wrapping CADS with graphene oxide by ultrasonic spray pyrolysis can enhance the integration and conductivity of CADS electrodes, thus providing a high capacity of 293 mAh g−1. •Croconic acid disodium salt (CADS) is firstly used as an anode in Na-ion battery.•The capacity decay of CADS electrode is due to particle pulverization.•Reducing particle size is an effective approach to enhance battery performance.•Graphene oxide wrapped CADS exhibits the best electrochemical performance.