Nonaqueous synthesis of nano-sized LiMnPO₄@C as a cathode material for high performance lithium ion batteries

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• 作者：Jingmin Fan^a ; Yang Yu^a ; Yang Wang^a ; Qi-Hui Wu^b ; ^{qhwu@qztc.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Mingsen Zheng^a ; ^{mszheng@xmu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Quanfeng Dong^a ; ^{qfdong@xmu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：LiMnPO4 ; Core@shell structure ; Lithium-ion batteries
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 March 2016
• 年：2016
• 卷：194
• 期：Complete
• 页码：52-58
• 全文大小：1713 K

文摘

A nano-sized LiMnPO₄@C core@shell structure was prepared through a facile two-step method. Oleylamine was introduced in the synthesis process using as both solvent and carbon source. The LiMnPO₄@C structure has a particle size smaller than 40 nm with uniform 2–3 nm carbon coating layers, which interweave to form a secondary micrometer-sized mesoporous structure. The as-prepared LiMnPO₄@C showed a high capacity of 168 mAh g⁻¹ at 0.1 C and 105 mAh g⁻¹ at 5 C applied as a cathode electrode for lithium ion batteries. The thin layer carbon coating not only increases LiMnPO₄ in electronic and ionic conductivity, but also enhances its cycling ability by stabilizing the solid electrolyte interface.