金属学报  2005, Vol. 41 Issue (12): 1280-1284

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合成温度对六方Li-Ni-Co-Mn-O固溶体结构和性能的影响

唐爱东; 黄可龙

中南大学化学化工学院功能材料化学研究所; 长沙 410083

EFFECT OF SYNTHESIZING TEMPERATURE ON THE STRUCTURE AND PROPERTY OF HEXAGONAL Li-Ni-Co-Mn-O SOLID SOLUTION

TANG Aidong; HUANG Kelong

Institute of Functional Material Chemistry; School of Chemistry and Chemical Engineering; Central South University; Changsha 410083

唐爱东; 黄可龙 . 合成温度对六方Li-Ni-Co-Mn-O固溶体结构和性能的影响[J]. 金属学报, 2005, 41(12): 1280-1284 .
, . EFFECT OF SYNTHESIZING TEMPERATURE ON THE STRUCTURE AND PROPERTY OF HEXAGONAL Li-Ni-Co-Mn-O SOLID SOLUTION[J]. Acta Metall Sin, 2005, 41(12): 1280-1284 .

摘要 参考文献 相关文章 Metrics 全文: PDF(224 KB)   摘要: 采用溶胶-凝胶法制备Li-Ni-Co-Mn-O化合物的前驱体. 借助于X射线衍 射(XRD)、扫描电镜(SEM)及充、放电测试等表征了不同温度下焙烧前驱体对高 温合成的Li-Ni-Co-Mn--O固溶体晶体结构、形貌及电化学性能的影响. 结果表明: 前驱体于600℃焙烧即可形成六方层状结构的Li-Ni-Co-Mn-O固溶体, 920-980 ℃ 产物的衍射峰强度及颗粒尺寸随合成温度的升高而增大, 950 ℃合成产物的 I_003 / I 104及晶胞体积要比920和980 ℃合成产物的大, 而且950 ℃合成产物 的首次充、放电容量最高, 电极极化最小, 在2.5-4.5 V以28 mA/g的电流密度进行 恒流充、放电, 其放电比容量达180 mA•h/g, 循环稳定性较好. 关键词 ： Li1.15-xNi1/3Co1/3Mn1/3O2+δ固溶体     Abstract：The cathode material for lithium batteries Li1.15-xNi1/3Co1/3Mn1/3O2+δ has been synthesized by sol-gel technique. The effects of synthesizing temperature on the structure, micro-morphology and electrochemical properties of these materials were investigated using X-ray diffraction, scanning electron microscopy and charge-discharge cycling tests. The material synthesized at 600 ℃ has a hexagonal layered structure. The intensity of the diffraction peaks and the particle size of the material synthesized at 920-980 ℃ increased with synthesizing temperature. The ratio values of I_003/I_104 and unit cell volume of the material synthesized at 950 ℃ are larger than those of the material synthesized at 920 and 980 ℃. The maximum charge/discharge capacity and the minimum electrode polarization were obtained for the material synthesized at 950 ℃, which has the initial discharge capacity of 180 mA•h/g in the range of 2.5-4.5 V at a specific current of 28 mA/g. Key words： Li1.15-xNi1    3Co1/3Mn1/3O2+δ    solid solution 收稿日期: 2005-04-04      ZTFLH:  TM912.9   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 唐爱东 黄可龙 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2005/V41/I12/1280 [1] Lee M-H, Kang Y-J, Myung S-T, Sun Y-K. Electrochim Acta, 2004; 50: 939 [2] Arachi Y, Kobayashi H, Emura S, Nakata Y, Tanaka M, Asai T, Sakaebe H, Tatsumi K, Kageyama H. Solid State Ionics, 2005; 176: 895 [3] Park Y J, Wu X L, Hong Y S, Ryu K S, Chang S H. Solid State Ionics, 2004; 175: 305 [4] Li J G, Wan C R, Yang D P, Yang Z P. Acta Phys Chim Sin, 2003; 19: 1030 (李建刚,万春荣,杨冬平,杨张平．物理化学学报,2003;19: 1030) [5] Park Y J, Hong Y S, Wu X L, Ryu K S, Chang S H. J Power Sources, 2004; 129: 288 [6] Kang S-H, Amine K. J Power Sources, 2003; 124: 533 [7] Yabuuchi N, Ohzuku T. J Power Sources, 2003; 119-121: 171 [8] Yoshio M, Noguchi K, Itoh J, Okada M, Mouri T. J Power Sources, 2000; 90: 176 [9] Shaju K M, Subba Rao G V, Chowdari B V R. Electrochim Acta, 2002; 48: 145 [10] Shaju K M, Subba Rao G V, Chowdari B. Electrochim Acta, 2003; 48: 1505 [11] Ohzuku T, Ueda A. J Electrochem Soc, 1994; 141: 2972 [12] Kim J M, Chung H T. Electrochim Acta, 2004; 49: 3573 [13] Kim J M, Chung H T. Electrochim Acta, 2004; 49: 937 [1] 黄可龙; 赵家昌; 刘素琴 . Li, Mn 源对LiMn2O4尖晶石高温电化学性能的影响[J]. 金属学报, 2003, 39(7): 739-743 . [2] 刘国强; 徐宁; 曾潮流; 杨柯 . 锂离子电池正极材料LiCo1-xNixO2的制备和性能[J]. 金属学报, 2003, 39(2): 209-212 . Viewed Full text Abstract Cited   Shared      Discussed