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材料导报  2023, Vol. 37 Issue (4): 21050208-6    https://doi.org/10.11896/cldb.21050208
  无机非金属及其复合材料 |
LiNO3-LiOH熔盐法制备单晶LiNi0.75Co0.10Mn0.15O2正极材料
虞亚霖1, 莫岩1,2, 陈永1,2,*, 李德1,*
1 海南大学,海南省硅锆钛综合开发与利用重点实验室,南海海洋资源利用国家重点实验室,海口 570228
2 佛山科学技术学院材料科学与氢能学院,广东 佛山 528000
Preparation of Single Crystal LiNi0.75Co0.10Mn0.15O2 Cathode Material by Molten Salt Method
YU Yalin1, MO Yan1,2, CHEN Yong1,2,*, LI De1,*
1 Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
2 School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, Guangdong, China
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摘要 目前,新型正极材料的研究主要集中于提高材料的能量密度和安全性等。其中,单晶型镍钴锰三元材料具有耐高压、高热力学稳定性和高循环稳定性等优异的综合性能,是极具发展前景的正极材料之一。采用LiOH作为熔盐、添加LiNO3助熔剂降低熔点,烧结制备单晶LiNi0.75Co0.10Mn0.15O2材料。结果表明,当烧结温度为860 ℃、前驱体与混合锂盐的物质的量比为1:2时,所合成的单晶正极材料的Li+/Ni2+混排率较低,晶体颗粒粒径为1.5~2.5 μm。该材料具有良好的循环稳定性,首圈放电容量为172.3 mAh/g,在常温、2.8~4.4 V内,以1C倍率循环100次后,其容量保持率可达86.3%。
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虞亚霖
莫岩
陈永
李德
关键词:  单晶  熔盐法  LiNi0.75Co0.10Mn0.15O2  正极材料    
Abstract: At present, the development of new cathode materials is mainly devoted to improving their energy density and safety. The single crystal nickel-cobalt-manganese ternary material has become one of the most promising cathode materials, due to its unique properties such as high safety, good thermodynamic and cycle stability. In this paper, single crystal LiNi0.75Co0.10Mn0.15O2 materials were synthesized via LiNO3-LiOH molten-salt assisted sintering, in which the LiOH was used as molten salt and LiNO3 was used as cosolvent to reduce melting temperature. Lower cation mixing of Li+/Ni2+ and homogeneous particle with the size of 1.5—2.5 μm were simultaneously obtained by sintering the mixture at 860 ℃ with the molar ratio of precursor to lithium salt of 1:2. The optimized sample yields high initial capacity of 172.3 mAh/g, and good cycle stability with capacity retention of 86.3% after 100 cycles (2.8—4.4 V, 1C) at room temperature.
Key words:  single crystal    molten salt method    LiNi0.75Co0.10Mn0.15O2    cathode material
出版日期:  2023-02-25      发布日期:  2023-03-02
ZTFLH:  TM912.9  
基金资助: 海南省重点研发项目(ZDYF2020028);国家自然科学基金(52062012)
通讯作者:  * 陈永,佛山科学技术学院教授,博士研究生导师。2006年在中国科学院金属研究所获得博士学位。曾在日本国立产业技术综合研究所和美国中佛罗里达大学从事锂离子电池材料研究。研究方向主要集中在储能材料与技术,致力于碳材料、超级电容器和锂离子电池研究及器件开发,发表SCI论文100余篇。ychen2002@163.com
李德,海南大学教授,2010年获得南京大学博士学位,2010年11月至2015年3月在日本国立产业技术综合研究所进行博士后研究。长期从事锂离子电池电极材料和新型电化学效应研究,以第一作者及通信作者在国内外学术期刊上发表20余篇论文。lidenju@sina.com   
作者简介:  虞亚霖,2019年毕业于海南大学,取得学士学位。目前在海南大学材料科学与工程学院从事新型储能材料的研究。
引用本文:    
虞亚霖, 莫岩, 陈永, 李德. LiNO3-LiOH熔盐法制备单晶LiNi0.75Co0.10Mn0.15O2正极材料[J]. 材料导报, 2023, 37(4): 21050208-6.
YU Yalin, MO Yan, CHEN Yong, LI De. Preparation of Single Crystal LiNi0.75Co0.10Mn0.15O2 Cathode Material by Molten Salt Method. Materials Reports, 2023, 37(4): 21050208-6.
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http://www.mater-rep.com/CN/10.11896/cldb.21050208  或          http://www.mater-rep.com/CN/Y2023/V37/I4/21050208
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