高倍率性能正极材料LiFe_(0.9)Mg_(0.1)PO_4的结构

doi:10.61558/2993-074X.1989

电化学（中英文） ›› 2009, Vol. 15 ›› Issue (3): 250-254. doi: 10.61558/2993-074X.1989

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;

清华大学材料科学与工程系,新型陶瓷与精细工艺国家重点实验室;

收稿日期:2009-08-28 修回日期:2009-08-28 出版日期:2009-08-28 发布日期:2009-08-28

Structural Basis for High-rate Capability of Cathode Material Li_(0.1)Fe_(0.9)Mg_(0.1)PO_4

HU Lin,LI Zheng,ZENG Zhao-qiang

(State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Tsinghua University,Beijing 100084,China

Received:2009-08-28 Revised:2009-08-28 Published:2009-08-28 Online:2009-08-28

摘要/Abstract

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.

关键词: 锂离子电池, 磷酸铁锂, 相变, 反应动力学, 晶格错配度

Abstract: 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.

Key words: lithium ion battery, lithium iron phosphate, phase transformation, kinetic behavior, lattice misfit

中图分类号:

TM912

胡林, 李征, 曾照强, . 高倍率性能正极材料LiFe_(0.9)Mg_(0.1)PO_4的结构[J]. 电化学（中英文）, 2009, 15(3): 250-254.

HU Lin, LI Zheng, ZENG Zhao-qiang. Structural Basis for High-rate Capability of Cathode Material Li_(0.1)Fe_(0.9)Mg_(0.1)PO_4[J]. Journal of Electrochemistry, 2009, 15(3): 250-254.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://electrochem.xmu.edu.cn/CN/10.61558/2993-074X.1989

https://electrochem.xmu.edu.cn/CN/Y2009/V15/I3/250

参考文献

[1]Wang De-yu,Li Hong,Shi Si-qi,et al.Improving the rate performance of LiFePO4by Fe-site doping[J].Electrochim Acta,2005,50:2955-2958. [2]Delacourt C,Laffont L,Masquelier C,et al.Toward understanding of electrical limitations(electronic,ion-ic)in LiMPO4(M=Fe,Mn)electrode materials[J].J Electrochem Soc,2005,152(5):A913-A921. [3]Huang H,Yin S,Nazar L.Approaching theoretical ca-pacity of LiFePO4at room temperature at high rates[J].Electrochem Solid State Lett,2001,4(10):A170-A172. [4]Chung S,Bloking J,Chiang Y.Electronically conduc-tive phosphor-olivines as lithium storage electrodes[J].Nat Mater,2002,1:123-128. [5]Herle P,Ellis B,Nazar L,et al.Nano-network elec-tronic conduction in iron and nickel olivine phosphates[J].Nat Mater,2004,3:147-152. [6]Ouyang Chu-ying,Shi Si-qi,Chen Li-quan,et al.First-principles study of Li ion diffusion in LiFePO4[J].Phys Rev B,2004,69(10):104303-1-5. [7]Wang Chun-sheng,Hong Jian.Ionic/electronic conduc-ting characteristics of LiFePO4cathode materials:the determining factors for high rate performance[J].Elec-trochem Solid State Lett,2007,10(3):A65-A69. [8]Meethong N,Carter W,Chiang Y,et al.Size-depend-ent lithium miscibility gap in nanoscale Li1-xFePO4[J].Electrochem Solid State Lett,2007,10(5):A134-A138. [9]Meethong N,Carter W,Chiang Y,et al.Strain accom-modation during phase transformations in olivine-based cathodes as a materials selection criterion for high-power rechargeable batteries[J].Adv Funct Mater,2007,17:1115-1123. [10]Islam M,Driscoll D,Slater P,et al.Atomic-scale in-vestigation of defects,dopants,and lithium transport in the LiFePO4olivine-type battery material[J].Chem Mater,2005,17(20):5085-5092. [11]Padhi A,Nanjundaswamy K,Goodenough J.Phospho-olivines as positive-electrode materials for rechargeablelithium batteries[J].J Electrochm Soc,1997,144(4):1188-1194. [12]Yamada A,Koizumi H,Nishimura S,et al.Room-tem-perature miscibility gap in LixFePO4[J].Nat Mater,2006,5:357-360. [13]WangDe-yu,WuXiao-dong,ChenLi-quan,etal.Cracking causing cyclic instability of cathode material[J].J Power Sources,2005,140:125-128. [14]Hong Jian,Wang Chun-sheng,Kasavajjula Uday.Ki-netic behavior of LiFe0.9Mg0.1PO4cathode material for Li-ion batteries[J].J Power Sources,2006,162:1289-1296.

[1]	温波, 朱卓, 李福军. 锂-氧气电池：正极催化剂的最新进展与挑战[J]. 电化学（中英文）, 2023, 29(2): 2215001-.
[2]	赵刚, 龚正良, 李益孝, 杨勇. 氧化钨和磷钨酸对LiNi_0.96Co_0.02Mn_0.02O₂材料的表面包覆改性研究[J]. 电化学（中英文）, 2023, 29(10): 2204281-.
[3]	陈思, 郑淞生, 郑雷铭, 张叶涵, 王兆林. 水热法制备锂电池Si@C负极材料的工艺优化研究[J]. 电化学（中英文）, 2022, 28(8): 2112221-.
[4]	王京玥, 王睿, 王诗琦, 王立帆, 詹纯. 一步固相法合成锂离子电池高镍层状正极材料[J]. 电化学（中英文）, 2022, 28(8): 2112131-.
[5]	谯渭川, 李芳儒, 肖瑾林, 屈丽娟, 赵晓, 张梦, 庞春雷, 李子坤, 任建国, 贺雪琴. 硅氧材料的膨胀性能研究和改善[J]. 电化学（中英文）, 2022, 28(5): 2108121-.
[6]	王加义, 郭胜楠, 王新, 谷林, 苏东. 锂离子电池高镍层状氧化物正极结构失效机制[J]. 电化学（中英文）, 2022, 28(2): 2108431-.
[7]	郭瑞琪, 吴锋, 王欣然, 白莹, 吴川. 多电子反应材料推动高能量密度电池发展：材料与体系创新[J]. 电化学（中英文）, 2022, 28(12): 2219011-.
[8]	朱振威, 邱景义, 王莉, 曹高萍, 何向明, 王京, 张浩. 人工智能在锂离子电池研发中的应用[J]. 电化学（中英文）, 2022, 28(12): 2219003-.
[9]	侯廷政, 陈翔, 蒋璐, 唐城. 当前和下一代锂离子电池电解液的原子尺度微观认识和研究进展[J]. 电化学（中英文）, 2022, 28(11): 2219007-.
[10]	李丹丹, 纪翔宇, 陈明, 杨燕茹, 王晓东, 冯光. 低聚离子液体的体相与界面及其电化学储能应用[J]. 电化学（中英文）, 2022, 28(11): 2219002-.
[11]	汪佳裕, 仝学锋, 彭启繁, 关越鹏, 王维坤, 王安邦, 刘乃强, 黄雅钦. 用纳米羟基磷灰石@多孔碳构建锂硫电池高效反应界面[J]. 电化学（中英文）, 2022, 28(11): 2219008-.
[12]	骆晨旭, 师晨光, 余志远, 黄令, 孙世刚. 富锂锰基层状正极材料的合成及其首周过充下的结构演化[J]. 电化学（中英文）, 2022, 28(1): 2006131-.
[13]	蔡雪凡, 孙升. 多孔电极电池的循环伏安法模拟[J]. 电化学（中英文）, 2021, 27(6): 646-657.
[14]	彭依, 张伟, 左防震, 吕浩莹, 洪凯骏. 二硒化钼纳米球储锂和储镁的性能和机理研究[J]. 电化学（中英文）, 2021, 27(4): 456-464.
[15]	周莉, 吴勰, 薛照明. 热塑性聚氨酯基聚合物电解质的制备与表征[J]. 电化学（中英文）, 2021, 27(4): 439-448.

高倍率性能正极材料LiFe_(0.9)Mg_(0.1)PO_4的结构

Structural Basis for High-rate Capability of Cathode Material Li_(0.1)Fe_(0.9)Mg_(0.1)PO_4

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics