Hierarchical Ru-doped sodium vanadium fluorophosphates hollow microspheres as a cathode of enhanced superior rate capability and ultralong stability for sodium-ion batteries

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• 作者：Manhua Peng^aAuthor Vitae ; Dongtang Zhang^a ; ^dAuthor Vitae ; Limin Zheng^aAuthor Vitae ; Xiayan Wang^a ; ^{xiayanwang@bjut.edu.cn}Author Vitae ; Yue Lin^bAuthor Vitae ; Dingguo Xia^cAuthor Vitae ; Yugang Sun^dAuthor Vitae ; Guangsheng Guo^aAuthor Vitae
• 关键词：Cathode ; Sodium-ion batteries ; Hollow microspheres ; Superior rate capability ; Long cycling stability
• 刊名：Nano Energy
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：31
• 期：Complete
• 页码：64-73
• 全文大小：1386 K
• 卷排序：31

文摘

Na3V2O2(PO4)2F (I4/mmm) sodium cathode materials with unique three-dimensional (3D) hierarchical structure overcoming the limitations of nanoparticles was successfully synthesized via a low-temperature solvothermal method. The synthesized hollow microspheres materials of Na3V2O2(PO4)2F, Ru-doped Na3V2O2(PO4)2F, and Ru-doped Na3V2O2(PO4)2F with RuO2 coating used in SIBs exhibited high reversible capacity, long cycle stability, and excellent rate performance. The formation mechanism of ordered hierarchical hollow microspheres controlled by the adsorption of hydrogen was systematically investigated via a series of experimentsand density functional theory (DFT) calculations providing insight to the design and synthesis of new electrode materials with the potential for future applications.