还原氧化石墨烯微观结构调控及储钠性能研究

Study on Microstructure Regulation and Sodium Storage Performance of Reduced Graphene Oxide

盛大伟 DIN HASEEB UD 张济原 刘晓旭

Dawei SHENG DIN HASEEB UD Jiyuan ZHANG Xiaoxu LIU

陕西科技大学 材料科学与工程学院，陕西 西安 710021

School of Material Science and Engineering，Shaanxi University of Science and Technology，Xi'an Shaanxi 710021，China

开发高效的碳基钠离子电池（SIBs）负极材料是目前的研究热点。采用不同退火温度，使预还原后的氧化石墨烯（GO）获得具有不同层间距的波浪状还原氧化石墨烯（rGO）谱，并将其应用于SIBs负极，通过优化电解液，探究了rGO微观结构与储钠性能、储钠机制的关系。经过调谐层间距并与电导率权衡后，rGO负极在醚类电解液中通过插层和溶剂化Na+共吸附的储钠机制，在SIBs中显示出较高的首次库伦效率（82%），经过100次循环后容量保持率高达93%，说明rGO负极具有优异的循环稳定性。

The development of efficient anode materials for carbon?based sodium ion batteries(SIBs) is a hot research topic. The prereduced graphene oxide(GO) was annealed at different temperatures to obtain wavy reduced graphene oxide(rGO) with different interlayer spacings for sodium?ion batteries(SIBs) anodes, and the electrolyte was further regulated to explore the relationship between the microstructure of graphene and sodium storage performance and sodium storage mechanism. The rGO anode after balancing the tuning layer spacing and conductivity shows a high initial coulombic efficiency of 82% in SIBs and excellent cycle stability of 93% capacity retention after 100 cycles through the sodium storage mechanism of intercalation and solvation Na+ co?adsorption in ether electrolyte.

国家自然科学基金项目(52250710161)

10.12422/j.issn.1006-396X.2023.06.005