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5V正极材料LiNi0．5Mn1．5O4的自蔓延燃烧合成 被引量：1

Self-propagation combustion synthesis of 5 V cathode material LiNi_(0.5)Mn_(1.5)O_4
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摘要 用柠檬酸络合辅助的自蔓延燃烧法合成了5V正极材料LiNi0．5Mn1．5O4。用XRD、SEM和电化学测试研究了焙烧温度、退火时间对材料的影响。在最佳条件（焙烧温度为820℃、退火时间为24h）下合成的样品具有完整的尖晶石结构和形貌，具有单一的4．7V平台，在20℃下以O．2C在3．5—5．1V充放电，首次放电比容量为122．7mAh／g，第20次循环的容量保持率为96．9％。 5 V cathode material LiNi0.5Mn1.5O4 was synthesized by citric acid assisted self-propagation combustion method. The effects of calcining temperature and annealing time on the material were studied by XRD,SEM and electrochemical tests. The sample synthesized under the optimum condition （calcining temperature was 820℃, annealing time was 24 h） had complete spinel structure and morphology,it had a single voltage plateau at 4.7 V. When charged-discharged at 3.5-5.1 V with 0.2 C under 20 ℃,the initial specific discharge capacity was 122.7 mAh/g,the capacity retention was 96.9% at the 20th cycle.
作者 张真 张峥 刘宏基 刘兴泉
机构地区 电子科技大学微电子与固体电子学院
出处 《电池》 CAS CSCD 北大核心 2011年第5期239-242,共4页 Battery Bimonthly
基金 国家自然科学基金项目(21071026) 电子科技大学杰出人才引进项目(Y02002010201026) 河南省新乡市群力电源材料有限公司与新乡市天力能源材料有限公司项目(H04010301W0309113)
关键词 正极材料 焙烧 退火 柠檬酸络合物 自蔓延燃烧反应 cathode material calcining annealing citric acid complex self-propagation combustion reaction
分类号 TM910.4 [电气工程—电力电子与电力传动]
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参考文献8

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共引文献14

同被引文献55

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电池
2011年 第5期

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