[1]刘 伶,魏奇业.LiNi0.8Co0.2O2合成工艺对其电化学性能的影响[J].中国材料进展,2016,(09):051-55.[doi:10.7502/j.issn.1674-3962.2016.09.11]
 LIU Ling,WEI Qiye.The Influence of LiNi0.8Co0.2O2 Synthetic Conditions on Its Electrochemical Performance[J].MATERIALS CHINA,2016,(09):051-55.[doi:10.7502/j.issn.1674-3962.2016.09.11]
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LiNi0.8Co0.2O2合成工艺对其电化学性能的影响
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2016年第09期
页码:
051-55
栏目:
研究报告
出版日期:
2016-09-30

文章信息/Info

Title:
The Influence of LiNi0.8Co0.2O2 Synthetic Conditions on
 Its Electrochemical Performance
作者:
 刘 伶魏奇业
 (吉林化工学院石油化工学院,吉林 吉林 132022)
Author(s):
 LIU LingWEI Qiye
 (Institute of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin 132022, China)
关键词:
LiNi0.8Co0.2O2共沉淀正极材料锂离子电池
DOI:
10.7502/j.issn.1674-3962.2016.09.11
文献标志码:
A
摘要:
采用液相共沉淀法合成前驱体Ni0.8Co0.2(OH)2,再通过高温焙烧合成LiNi0.8Co0.2O2。研究了前驱体反应时间、反应温度、高温焙烧温度及焙烧时间对材料电化学性能的影响。对所制备材料进行恒流充放电测试,结果表明,在55℃下,共沉淀反应时间为3h时,制备的材料具有较好的电化学性能,其首次放电比容量为164.5mAh?g-1 ,50次容量保持率为92.6%。不同焙烧温度和焙烧时间制备材料的电化学性能的测试结果表明,随着焙烧温度的升高和焙烧时间的增加,产物的电化学性能逐渐提高。焙烧温度为800℃ ,焙烧时间为 20h得到材料的电化学性能最优,其首次放电比容量为162 mAh?g-1。因此,所制备的LiNi0.8Co0.2O2最佳合成工艺条件为:共沉淀反应温度55℃,反应时间3h,焙烧温度为800℃,焙烧时间为20h。
Abstract:
LiNi0.8Co0.2O2 powder was prepared by co-precipitation method and solid state reaction method,the precursor prepared by the co-prcipitation was Ni0.8Co0.2(OH)2. The effects of the synthesis temperature, synthesis time, the high temperature calcination temperature and the calcination time on the electrochemical properties of the cathode material were investigated in detail. The electrochemical properties of the prepared LiNi0.8Co0.2O2 were characterized by galvanostatic charge–discharge test. The results indicated that the LiNi0.8Co0.2O2 prepared at 55℃ for 3h had the best electrochemical performance, its first discharge capacity was 164.5mAh?g-1 and capacity retention after 50 cycles was 92.6% . The calcination temperatures and calcination times caused great difference in the electrchemical properties of  LiNi0.8Co0.2O2, its electrochemical properties increased with the increase of calcination temperature and calcination time. The best electrochemical properties were obtained at the calcination temperature of 800℃ for 20h, its first discharge capacity was 162 mAh?g-1 . Therefore, the optimum synthetic conditions were: synthesis temperature was 55℃, synthesis time was 6h, calcination temperature was 800℃ and calcination time was 20h.
更新日期/Last Update: 2016-09-21