A novel method to synthesize SnP₂O₇ spherical particles for lithium-ion battery anode

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• 作者：Tongfu Wu ; Gaole Dai ; Cancan Qin ; Jiali Cao ; YueFeng Tang ; YanFeng Chen
• 关键词：Lithium ; ion battery ; Mesoporous SnP2O7 ; Spherical particles ; C2H8O7P2
• 刊名：Ionics
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：22
• 期：12
• 页码：2315-2319
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage;
• 出版者：Springer Berlin Heidelberg
• ISSN：1862-0760
• 卷排序：22

文摘

For the urgent demand of higher capacity of lithium-ion battery anode, tin pyrophosphate has attracted more and more attention because of its high theoretical capacity, cheapness, and no toxicity. However, production of stable mesoporous sphere structure and improvement of electrochemical performance remain a challenge. Here, SnP₂O₇ spherical particles were successfully prepared through spray drying method with SnCl₄·5H₂O and C₂H₈O₇P₂. Crystallization and microstructure were investigated by TG-DSC, XRD, SEM, and TEM. With the obtained mesoporous SnP₂O₇ particles after carbon coating, it demonstrates a high initial capacity reaching up to 1218 mAh g−1 and a significantly stable cycling performance with 620 mAh g−1 after 80 deep electrochemical cycles.