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The Effects of a Mixed Precipitant on the Morphology and Electrochemical Performance of LiNi0.5Mn1.5O4 Cathode Materials
Shu, Yang1,2; Yan, Wenchao2; Wang, Haisong1; Jiang, Jicheng2; Sun, Deye2; Ma, Xiaodi2; Jin, Yongcheng2
2017-09-01
发表期刊CRYSTALS
卷号7期号:9
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.
文章类型Article
关键词Rapid Precipitation Hydrothermal Treatment Mixed Precipitants Spherical Morphology
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.3390/cryst7090275
关键词[WOS]LITHIUM-ION BATTERIES ; VOLTAGE SPINEL LINI0.5MN1.5O4 ; COPRECIPITATION METHOD ; MICROSPHERES ; LIMN1.5NI0.5O4
收录类别SCI
语种英语
WOS研究方向Crystallography ; Materials Science
项目资助者Chinese Academy of Sciences(YZ201641)
WOS类目Crystallography ; Materials Science, Multidisciplinary
WOS记录号WOS:000412049600019
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文献类型期刊论文
条目标识符http://ir.qibebt.ac.cn/handle/337004/9601
专题先进界面技术研究组
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
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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).
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