本文以Na2S,S,FeSO4为反应物,通过调节溶液的pH值和反应温度,采用水热法合成了具有立方体形貌的黄铁矿型FeS2材料.采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)等手段对合成的FeS2材料进行了表征.在温度为500℃,相对湿度RH ≤1％的条件下,测试了其单体热电池的放电性能.XRD测试结果表明当1≤pH≤4时,产物为白铁矿和黄铁矿的混合物;当5≤pH≤11时,产物为单相黄铁矿.当反应温度T=95℃时,产物为白铁矿和黄铁矿的混合物;当反应温度110℃≤T≤200℃,产物为单相黄铁矿.SEM测试结果表明随着温度的增加,产物的粒径也随之增加,在140℃温度条件下合成了具有立方体形貌的颗粒.当1≤pH≤5,产物颗粒的形貌不规则,并且粒径的均一性差;当9≤pH≤12,产物颗粒具有立方形貌,粒径的均一性好;放电测试结果表明合成的单相黄铁矿FeS2材料可以降低浓差极化,提高材料的比容量、比能量.
参考文献
| [1] | H.Duan;Y.F.Zheng;Y.Z.Dong;X.G.Zhang;Y.F.Sun .Pyrite (FeS_2) films prepared via sol-gel hydrothermal method combined with electrophoretic deposition (EPD)[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2004(12):1861-1868. |
| [2] | Dahman H.;Brunel M.;Rezig B.;Khalifa M. .IRON PYRITE FILMS PREPARED BY SULFUR VAPOR TRANSPORT[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,1996(1/2):56-60. |
| [3] | R. J. Soukup;P. Prabukanthan;N. J. Ianno;A. Sarkar;C. A. Kamler;D. G. Sekora .Formation of pyrite (FeS_(2)) thin films by thermal sulfurization of dc magnetron sputtered iron[J].Journal of Vacuum Science & Technology, A. Vacuum, Surfaces, and Films,2011(1):011001-1-011001-5. |
| [4] | Bi, Y.;Yuan, Y.;Exstrom, C.L.;Darveau, S.A.;Huang, J. .Air stable, photosensitive, phase pure iron pyrite nanocrystal thin films for photovoltaic application[J].Nano letters,2011(11):4953-4957. |
| [5] | 张浩,刘军,王立秋,李克艳,薛冬峰,刘长厚.溶剂热结晶FeS2及其光吸收特性[J].人工晶体学报,2009(01):79-82. |
| [6] | Rickard D .The solubility of FeS[J].Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society,2006(23):5779-5789. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%