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dc.contributor.author王琴zh_CN
dc.contributor.author周丽丽zh_CN
dc.contributor.author沈重亨zh_CN
dc.contributor.author王琪zh_CN
dc.contributor.author黄令zh_CN
dc.contributor.author李君涛zh_CN
dc.contributor.author孙世刚zh_CN
dc.contributor.authorWANG Qinzh_CN
dc.contributor.authorZHOU Li-lizh_CN
dc.contributor.authorSHEN Chong-hengzh_CN
dc.contributor.authorWANG Qizh_CN
dc.contributor.authorHUANG Lingzh_CN
dc.contributor.authorLI Jun-taozh_CN
dc.contributor.authorSUN Shi-gangzh_CN
dc.date.accessioned2015-09-17T01:48:56Z
dc.date.available2015-09-17T01:48:56Z
dc.date.issued2015-08-28zh_CN
dc.identifier.citation电化学,2015,21(4):312-318.zh_CN
dc.identifier.issn1006-3471zh_CN
dc.identifier.urihttp://dx.doi.org/10.13208/j.electrochem.150325zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/93757
dc.description.abstract以NaOH为沉淀剂,采用共沉淀法制备尖晶石LiNi0.5Mn1.5O4正极材料,使用X-射线衍射(XRD)、傅里叶转换红外光谱(FTIR)和扫描电镜(SEM)分析材料结构与表面形貌. 结果表明,该材料属于空间群的无序尖晶石LiNi0.5Mn1.5O4材料,由八面体粒子团聚成3 ~ 6 μm的大粒子. 恒电流充放电结果显示,材料在0.1C倍率下首周放电比容量为121.5 mAh·g-1,经过150周充放电后,材料比容量无明显衰减,其容量保持率为99%. 用PITT和原位XRD联用技术研究了充放电过程中材料的结构与锂离子扩散系数之间的关系. PITT法测得材料中锂离子的扩散系数为10-10 ~ 10-11 cm2·s-1.zh_CN
dc.description.abstractThe spinel LiNi0.5Mn1.5O4 material was synthesized by co-precipitation method with NaOH as a precipitant. The structure and morphology of the as-prepared LiNi0.5Mn1.5O4 materials were characterized by means of XRD、FTIR and SEM. The results indicated that the material belonged to space group and consisted of octahedral particles with the sizes of 3 ~ 6 μm. Electrochemical tests showed the first discharge specific capacity of 121.5 mAh·g-1 at 0.1C. After 150 cycles, about 99% of reversible capacity was retained for the LiNi0.5Mn1.5O4 material. A combining potentiostatic intermittent titration technique (PITT) with in-situ XRD measurement was applied for discussing the relationship between lattice parameter and the diffusion coefficient of lithium ion (DLi+) during the first charging-discharging processes. The DLi+ value measured by PITT was in the range of 10-10 ~ 10-11 cm2·s-1zh_CN
dc.description.sponsorship国家自然科学基金项目(No. 21273184,No. 21321062)及973项目(No. 2015CB251102)资助zh_CN
dc.language.isozhzh_CN
dc.publisher厦门大学《电化学》编辑部zh_CN
dc.relation.ispartofseries研究论文zh_CN
dc.relation.ispartofseriesArticleszh_CN
dc.source.urihttp://electrochem.xmu.edu.cn/CN/abstract/abstract10170.shtmlzh_CN
dc.subject锂离子电池zh_CN
dc.subject正极材料zh_CN
dc.subject共沉淀方法zh_CN
dc.subject锂离子扩散系数zh_CN
dc.subject原位XRDzh_CN
dc.subjectLi-ion batteryzh_CN
dc.subjectco-precipitationzh_CN
dc.subjectthe Li ion diffusion coefficientzh_CN
dc.subjectin-situ XRDzh_CN
dc.subjectpotentiostatic intermittent titration techniquezh_CN
dc.title尖晶石LiNi0.5Mn1.5O4正极材料首周充放电过程的结构与动力学研究zh_CN
dc.title.alternativeStructural and Dynamic Studies of Spinel LiNi0.5Mn1.5O4Cathode Material during Initial Charge/Discharge Processeszh_CN
dc.typeArticlezh_CN
dc.description.note作者联系地址:1. 厦门大学化学化工学院化学系,福建 厦门 361005;2. 厦门大学能源研究院,福建 厦门 361005zh_CN
dc.description.noteAuthor's Address: 1. Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China; 2. School of Energy Research, Xiamen University, Xiamen 361005, Fujian, Chinazh_CN
dc.description.note通讯作者E-mail:huangl@xmu.edu.cnzh_CN


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