人工晶体学报2018，Vol.47Issue(2)：254-260,7.
磷酸铁锂单晶水热法生长及其表征
Hydrothermal Growth and Characterization of LiFePO4Crystals
摘要
Abstract
The single-crystal LiFePO4was synthesized by Guilin hydrothermal method, and the single crystal of lithium iron phosphate was prepared.The single crystal has a six-prism structure or a crystal with a round shape, isometric appearance.XRD patterns of the single-crystal LiFePO4was obtained by the experiment.In 10°to 40°strong within the scope of the main peak,compared with nm level lithium iron phosphate,mm leve crystal has one more(020)surface.It is indicate that in the later period of crystal growth, mainly controlled by(020)surface, the main six prismatic properties are ending at (010),(200),(101)surfaces of three,these advantages face this is expected to be in the exchange of electrochemistry and surface properties play an important role.Based on the analysis of LiFePO4crystal structure,the geometrical environment of lithium ion diffusion in lithium iron phosphate was analyzed. The lithium ion is diffused in the direction of(010),so it is possible to propose the design synthesis to reduce the axis of the b axis.To expand the 2-dimensional flaky structure of the ac direction of LiFePO 4. It is expected to increase the diffusion rate of lithium ions, thus improving the conductivity, multiplier performance and low temperature performance of LiFePO 4materials.Selected by the single crystal of LiFePO4in ultraviolet-visible absorption spectrum wavelength range, known LiFePO4large absorption in the uv area.There is a wide band in the visible area,with a smaller absorption value,and the majority of the light passes through,which is why the color of LiFePO 4single crystal is not deep.The hydrothermal growth of LiFePO4crystals has a good permeability.The color center caused by the point defect of the synthesized LiFePO4crystal is absorbed by the light of the near infrared short-wave part 980-1700 nm wavelength, and the near-infrared long wave 1750-3000 nm light is all filtered through.The high symmetry absorption and transmission of LiFePO 4crystals 1000-3000 nm wavelength will make a breakthrough in the application of near-infrared band window devices.关键词
LiFePO4单晶/水热法/形貌与结构/吸收光谱Key words
LiFePO4crystal/hydrothermal method/crystal morphology and structure/absorption spectrum分类
数理科学引用本文复制引用
张梦雪,任孟德,王金亮,周海涛,雷威,柳成荫..磷酸铁锂单晶水热法生长及其表征[J].人工晶体学报,2018,47(2):254-260,7.基金项目
广西自然科学基金(2015GXNSFAA139264) （2015GXNSFAA139264）
广西科学研究与技术开发计划(桂科攻1598008-9) （桂科攻1598008-9）
广西科技计划(技术创新引导专项)(桂科AC16380040) （技术创新引导专项）
