使用还原铁粉作为铁源,通过超细球磨与喷雾干燥、高温煅烧技术制备了球形微纳米LiFePO4/C复合材料.使用DSC/TG以及XRD对LiFePO4/C复合材料的形成过程进行了分析;使用SEM、穆斯堡谱仪等手段对复合材料进行分析;使用电化学工作站、容量测试仪对其充放电行为进行分析.研究发现,使用该合成技术路线,在500～700℃下能够合成LiFePO4/C复合材料.获得的LiFePO4/C复合材料具有规则的球形外貌,平均尺寸4～5 μm.该微米颗粒由200 nm左右细小颗粒组成,颗粒间具有纳米尺寸微孔.穆斯堡谱仪测试结果表明,复合材料中Fe处于+2价的价态.复合材料在1C倍率下表现出稳定的充放电行为,平均比容量在156 mAh/g,300次循环后,容量保持率为92.8％.该技术制备的LiFePO4/C复合材料具有潜在的应用价值.
参考文献
| [1] | Padhi AK.;Goodenough JB.;Nanjundaswamy KS..PHOSPHO-OLIVINES AS POSITIVE-ELECTRODE MATERIALS FOR RECHARGEABLE LITHIUM BATTERIES[J].Journal of the Electrochemical Society,19974(4):1188-1194. |
| [2] | Andersson AS.;Haggstrom L.;Thomas JO.;Kalska B..Lithium extraction/insertion in LiFePO4: an X-ray diffraction and Mossbauer spectroscopy study[J].Solid state ionics,20001/2(1/2):41-52. |
| [3] | Atsuo Yamada;Mamoru Hosoya;Sai-Cheong Chung;Yoshihiro Kudo;Koichiro Hinokuma;Kuang-Yu Liu;Yoshio Nishi.Olivine-type cathodes Achievements and problems[J].Journal of Power Sources,2003119/121(119/121):232-238. |
| [4] | 王冠 .锂离子电池正极材料LiFePO<,4>制备及其性能研究[D].复旦大学,2006. |
| [5] | Jin B;Gu HB.Preparation and characterization of LiFePO4 cathode materials by hydrothermal method[J].Solid state ionics,200837/38(37/38):1907-1914. |
| [6] | Li Wang;Wenting Sun;Xianyi Tang;Xiankun Huang;Xiangming He;Jianjun Li;Qingwu Zhang;Jian Gao;Guangyu Tian;Shoushan Fan.Nano particle LiFePO_4 prepared by solvothermal process[J].Journal of Power Sources,2013Dec.15(Dec.15):94-100. |
| [7] | Yi-Chuan Lin;George Ting-Kuo Fey;Pin-Jiun Wu;Jeng-Kuei Chang;Hsien-Ming Kao.Synthesis and electrochemical properties of xLiFePO_4·(1 - x)LiVPO_4F composites prepared by aqueous precipitation and carbothermal reduction[J].Journal of Power Sources,2013Dec.15(Dec.15):63-71. |
| [8] | Bridges, C.A.;Harrison, K.L.;Unocic, R.R.;Idrobo, J.-C.;Paranthaman, M.P.;Manthiram, A..Defect chemistry of phospho-olivine nanoparticles synthesized by a microwave-assisted solvothermal process[J].Journal of Solid State Chemistry,2013:197-204. |
| [9] | Qi Fan;Lixu Lei;Yanfeng Chen;Yueming Sun.Biotemplated synthesis of LiFePO_4/C matrixes for the conductive agent-free cathode of lithium ion batteries[J].Journal of Power Sources,2013Dec.15(Dec.15):702-706. |
| [10] | Lee SB;Cho SH;Cho SJ;Park GJ;Park SH;Lee YS.Synthesis of LiFePO4 material with improved cycling performance under harsh conditions[J].Electrochemistry communications,20089(9):1219-1221. |
| [11] | 王思敏;郑明森;董全峰.纳米级LiFePO4材料的水热模板法合成及其性能研究[J].电化学,2008(4):365-368. |
| [12] | 张俊喜;曹小卫;徐娜;张铃松;颜立成;张万友.一种合成LiFePO4的新方法[J].材料研究学报,2008(4):439-443. |
| [13] | Guo, XF;Zhan, H;Zhou, YH.Rapid synthesis of LiFePO4/C composite by microwave method[J].Solid state ionics,20094/5(4/5):386-391. |
| [14] | S. T. Yang;N. H. Zhao;H. Y. Dong;J. X. Yang;H. Y. Yue.Synthesis and characterization of LiFePO{sub}4 cathode material dispersed with nano-structured carbon[J].Electrochimica Acta,20051(1):166-171. |
| [15] | Md.Mokhlesur Rahman;Jia-Zhao Wang;Rong Zeng;David Wexler;Hua Kun Liu.LiFePO_4-Fe_2P-C composite cathode: An environmentally friendly promising electrode material for lithium-ion battery[J].Journal of Power Sources,2012May 15(May 15):259-266. |
| [16] | Chenglin Hu;Huihua Yi;Haisheng Fang;Bin Yang;Yaochun Yao;Wenhui Ma;Yongnian Dai.Suppressing Li_3PO_4 impurity formation in LiFePO_4/Fe_2P by a nonstoichiometry synthesis and its effect on electrochemical properties[J].Materials Letters,20119(9):1323-1326. |
| [17] | Xiaojun Huang;Shengjie Yan;Huiying Zhao;Lei Zhang;Rui Guo;Chengkang Chang;Xiangyang Kong;Haibo Han.Electrochemical performance of LiFePO_4 nanorods obtained from hydrothermal process[J].Materials Characterization,20107(7):720-725. |
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%