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	高倍率性能正极材料LiFe_(0.9)Mg_(0.1)PO_4的结构
	胡林 ; 李征 ; 曾照强 ; HU Lin ; LI Zheng ; ZENG Zhao-qiang
	2010-06-10 ; 2010-06-10
关键词	锂离子电池 磷酸铁锂 相变 反应动力学 晶格错配度 lithium ion battery lithium iron phosphate phase transformation kinetic behavior lattice misfit TM912
其他题名	Structural Basis for High-rate Capability of Cathode Material Li_(0.1)Fe_(0.9)Mg_(0.1)PO_4
中文摘要	应用高温固相反应合成锂离子电池正极材料LiFePO4和LiFe0.9Mg0.1PO4.不同浓度的K2S2O8水溶液氧化LiFe0.9Mg0.1PO4制备部分脱锂两相混合物Li0.4Fe0.9Mg0.1PO4及完全脱锂单相化合物Li0.1Fe0.9Mg0.1PO4.X射线衍射物相分析(XRD),选区电子衍射(SAED)和高分辨原子图像(HRTEM)测试表明,脱锂相Li0.1Fe0.9Mg0.1PO4是单相化合物,没有发生相分离.点阵参数计算表明,LiFe0.9Mg0.1PO4体系嵌锂相和脱锂相的晶格错配度与LiFePO4体系相比有所降低,这正是锂离子电池正极材料LiFe0.9Mg0.1PO4具有高倍率循环充放电比容量的结构基础.; Cathode materials LiFePO4 and LiFe0.9Mg0.1PO4 for lithium ion batteries were synthesized by a solid state reaction. Chemical oxidation to obtain Li0.4Fe0.9Mg0.1PO4 and Li0.1Fe0.9Mg0.1PO4 was carried out by reacting LiFe0.9Mg0.1PO4 with K2S2O8 solution of different concentration. Li0.1Fe0.9Mg0.1PO4 was confirmed to be a single phase compound with no impure phases,investigated by X-ray diffraction (XRD),selected area electron diffraction (SAED) and high-resolution transmission electron microscopy (HRTEM) techniques. Calculated lattice parameter results showed decreased lattice misfit between lithiated LiFe0.9Mg0.1PO4 and delithiated Li0.1Fe0.9Mg0.1PO4,compared lattice misfit between LiFePO4 and FePO4. It was considered the decreased lattice misfit as the structural basis for optimized high-rate capability of cathode material LiFe0.9Mg0.1PO4 for lithium ion batteries.; 国家自然科学基金(50274010); 国家863计划(2006AA03Z224)和(2007AA05Z150)资助
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/61258]
专题	清华大学
推荐引用方式 GB/T 7714	胡林,李征,曾照强,等. 高倍率性能正极材料LiFe_(0.9)Mg_(0.1)PO_4的结构[J],2010, 2010.
APA	胡林,李征,曾照强,HU Lin,LI Zheng,&ZENG Zhao-qiang.(2010).高倍率性能正极材料LiFe_(0.9)Mg_(0.1)PO_4的结构..
MLA	胡林,et al."高倍率性能正极材料LiFe_(0.9)Mg_(0.1)PO_4的结构".(2010).

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