钠离子电池正极材料Na2MnPO4F的23Na MAS NMR谱研究

CORC > 厦门大学 > 2014年第20卷

	钠离子电池正极材料Na2MnPO4F的23Na MAS NMR谱研究; 23Na MAS NMR Spectroscopic Study of Na2MnPO4F as Cathode Material for Sodium-Ion Battery
	侯旭 ; 钟贵明 ; 林晓琛 ; 刘子庚 ; 吴晓彪 ; 杨勇 ; HOU Xu ; ZHONG Gui-ming ; LIN Xiao-chen ; LIU Zi-geng ; WU Xiao-biao ; YANG Yong
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract10068.shtml
	2014-06-28
关键词	钠离子电池正极材料 Na2MnPO4F 23Na MAS NMR sodium ion batteries cathode material Na2MnPO4F 23Na MAS NMR
英文摘要	Na2MnPO4F材料是一种很有发展前景的钠离子电池正极材料，本文通过非原位XRD和固体核磁共振技术研究该材料充放电结构变化（晶体结构与局域Na位）. 非原位XRD测试发现，充电过程在2θ为31o和36o左右出现新的衍射峰，表明钠脱出后电极上有中间相物质生成. 23Na MAS NMR谱图的-209 ppm、-258 ppm和-295 ppm三个谱峰分别对应于该材料结构中Na1 + Na2位、Na3位和Na4位. 非原位23Na MAS NMR谱研究发现，充电过程中-209 ppm处信号峰面积比例减小，表明Na1和Na2位的Na比Na3和Na4位先脱出. 充电至4.2 V，-132 ppm和-330 ppm处出现中间相物质的信号峰；而放电过程则相反.; The Na2MnPO4F is one of the promising cathode materials for the sodium ion batteries. In the paper, we employed the ex situ X-ray diffraction and solid state NMR techniques to study the charge and discharge processes of this material, including the crystal structure and sodium sites changes. The ex situ x-ray diffraction patterns showed that two new diffraction peaks could be observed at 31o and 36o indicating an intermediate phase formed with the extraction of Na+. From the 23Na MAS NMR spectrum of the material, three peaks were seen at -209 ppm，-258 ppm and -295 ppm, which can be assigned to Na1 + Na2, Na3 and Na4 sites in the crystal structure, respectively. The ex situ solid state NMR study demonstrated that the Na+ in Na1 and Na2 sites deintercalated firstly compared to Na3 and Na4 sites. The signal peaks of intermediate phase appeared at -132 ppm and -330 ppm when charging to 4.2 V. The opposite phenomenon occurred during the discharge process.; 973国家重点基础研究发展计划（No. 2011CB935903）和国家自然科学基金（No. 21233004、No. 21021002）项目资助; 作者联系地址：厦门大学化学化工学院化学系，固体表面物理化学国家重点实验室，福建厦门 361005; Author's Address: State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China; 通讯作者E-mail：yyang@xmu.edu.cn
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dx.doi.org/10.13208/j.electrochem.140401]
专题	2014年第20卷
推荐引用方式 GB/T 7714	侯旭,钟贵明,林晓琛,等. 钠离子电池正极材料Na2MnPO4F的23Na MAS NMR谱研究, 23Na MAS NMR Spectroscopic Study of Na2MnPO4F as Cathode Material for Sodium-Ion Battery[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract10068.shtml,2014.
APA	侯旭.,钟贵明.,林晓琛.,刘子庚.,吴晓彪.,...&YANG Yong.(2014).钠离子电池正极材料Na2MnPO4F的23Na MAS NMR谱研究.http://electrochem.xmu.edu.cn/CN/abstract/abstract10068.shtml.
MLA	侯旭,et al."钠离子电池正极材料Na2MnPO4F的23Na MAS NMR谱研究".http://electrochem.xmu.edu.cn/CN/abstract/abstract10068.shtml (2014).