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Zr^(4+)离子掺杂对LiFePO_4结构及电化学性能的影响 被引量：10

Effects on the Structure and Electrochemical Performance of LiFePO_(4) by Zr^(4+) Doping
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摘要 应用固相反应法于惰性气氛下合成掺Zr的L iFePO4正极材料.考察Zr4+掺杂浓度对于目标化合物结构及其电化学性能的影响.XRD,交流阻抗和恒流充放电测试等实验表明,少量的Zr4+掺杂并未影响目标材料产物的结构,反而有利于降低L iFePO4电荷转移反应的阻抗,从而有利于克服该电极过程中的动力学限制.该正极材料表现出优良的倍率放电性能,在0.1C倍率下,L i0.99Zr0.01FePO4的首次放电比容量达135.6mAh.g-1.30次循环后,容量衰减仅3.8%. Stoichiometric Zr-doped lithium iron phosphate （LiFePO4） cathode material was synthesized by a solid-state reaction in an inert atmosphere. The effects of doping content on the physical and electrochemical and cycle performance. At 0.1C discharging rate, the reversible specific capacities of the Lio.99Zr0.01FePO4cathode material is 135.6mAh g^-l. After 30 cycles, the capacity rade was only 3.8%. The cathode material also displays a better rate performance.
作者 阮艳莉 唐致远
机构地区 天津大学化工学院应用化学系
出处 《电化学》 CAS CSCD 北大核心 2006年第3期315-318,共4页 Journal of Electrochemistry
基金 国家自然科学基金(No.20273047)资助
关键词 磷酸铁锂 正极材料 掺杂 电化学性能 LiFePO4, Cathode material, Doping, Electrochemical performance
分类号 O614.111 [理学—无机化学]
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参考文献11

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同被引文献120

引证文献10

二级引证文献15

电化学
2006年 第3期

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