The Effects of a Mixed Precipitant on the Morphology and Electrochemical Performance of LiNi0.5Mn1.5O4 Cathode Materials

doi:10.3390/cryst7090275

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	The Effects of a Mixed Precipitant on the Morphology and Electrochemical Performance of LiNi0.5Mn1.5O4 Cathode Materials
	Shu, Yang 1,2; Yan, Wenchao 2; Wang, Haisong 1; Jiang, Jicheng 2; Sun, Deye 2; Ma, Xiaodi 2; Jin, Yongcheng 2
刊名	CRYSTALS
	2017-09-01
卷号	7 期号:9
关键词	Rapid Precipitation Hydrothermal Treatment Mixed Precipitants Spherical Morphology
DOI	10.3390/cryst7090275
文献子类	Article
英文摘要	A series of LiNi0.5Mn1.5O4 (LNMO) samples were synthesized by adjusting the molar ratio of (NH4)(2)CO3 to Na2CO3 in a mixed precipitant for evaluating the effects of ammonia from (NH4)(2)CO3 as a complexing agent and Na2CO3 as a precipitant on the morphology and electrochemical performances of LNMO. In this research, a rapid precipitation method followed by hydrothermal treatment was used to prepare the precursors of LNMO, and different molar ratios (0:1, 1:2, 1:1, 2:1, 1:0) of (NH4)(2)CO3 to Na2CO3 were used for mixed precipitants. The test results revealed that the cathode material exhibits the best electrochemical performance when the molar ratio of (NH4)(2)CO3 to Na2CO3 is set at 1:2, displaying a specific discharge capacity of 129.4 mA h g(-1) at 0.5 C and a capacity retention of 82.3% after 200 charge-discharge cycles. In addition, it still shows a high rate performance with a discharge capacity of 112.7 mA h g(-1) at 10 C and 98.8 mA h g(-1) at 20 C, which is attributed to an accurate Ni/Mn ratio, smaller primary particle sizes and a porous spherical morphology.
WOS关键词	LITHIUM-ION BATTERIES ; VOLTAGE SPINEL LINI0.5MN1.5O4 ; COPRECIPITATION METHOD ; MICROSPHERES ; LIMN1.5NI0.5O4
WOS研究方向	Crystallography ; Materials Science
语种	英语
WOS记录号	WOS:000412049600019
资助机构	Chinese Academy of Sciences(YZ201641)
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/9601]
专题	青岛生物能源与过程研究所_先进界面技术团队
作者单位	1.Dalian Polytech Univ, Sch Light Ind & Chem Engn, Dalian 116034, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China
推荐引用方式 GB/T 7714	Shu, Yang,Yan, Wenchao,Wang, Haisong,et al. The Effects of a Mixed Precipitant on the Morphology and Electrochemical Performance of LiNi0.5Mn1.5O4 Cathode Materials[J]. CRYSTALS,2017,7(9).
APA	Shu, Yang.,Yan, Wenchao.,Wang, Haisong.,Jiang, Jicheng.,Sun, Deye.,...&Jin, Yongcheng.(2017).The Effects of a Mixed Precipitant on the Morphology and Electrochemical Performance of LiNi0.5Mn1.5O4 Cathode Materials.CRYSTALS,7(9).
MLA	Shu, Yang,et al."The Effects of a Mixed Precipitant on the Morphology and Electrochemical Performance of LiNi0.5Mn1.5O4 Cathode Materials".CRYSTALS 7.9(2017).