以Li2CO3、FeOOH、纳米SiO2为原料,聚乙烯醇和超导碳为碳源,采用微波碳热合成法合成了Li2FeSiO4/C材料.通过XRD、SEM和恒流充放电测试,对样品结构、形貌和电化学性能进行了表征和分析.结果表明,微波合成法可以快速制备具有正交结构的Li2FeSiO4材料;在处理温度650℃、时间12min的条件下获得了高纯度、晶粒细小均匀的产物,并具有良好的电化学性能.以C/20倍率进行充放电测试,首次放电容量为127.5mAh/g,20次循环后容量仍有124mAh/g.
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,1997(4):1188-1194. |
| [2] | Ho Chul Shin;Won Il Cho;Ho Jang .Electrochemical properties of carbon-coated LiFePO{sub}4 cathode using graphite, carbon black, and acetylene black[J].Electrochimica Acta,2006(4):1472-1476. |
| [3] | 施志聪;杨勇 .[J].化学进展,2005,17(04):604-613. |
| [4] | Larsson P;Ahuia R;Nyten A;Thomas JO .An ab initio study of the Li-ion battery cathode material Li2FeSiO4[J].Electrochemistry communications,2006(5):797-800. |
| [5] | Dompablo M A;Armand M;Tarascon J M et al.[J].Electrochemistry Communications,2006,8(08):1292-1298. |
| [6] | Nyten A;Abouimrane A;Armand M;Gustafsson T;Thomas JO .Electrochemical performance of Li2FeSiO4 as a new Li-battery cathode material[J].Electrochemistry communications,2005(2):156-160. |
| [7] | Dominko R;Bele M;Gaberscek M;Meden A;Remskar M;Jamnik J .Structure and electrochemical performance of Li2MnSiO4 and Li2FeSiO4 as potential Li-battery cathode materials[J].Electrochemistry communications,2006(2):217-222. |
| [8] | Zaghib K;Salah AA;Ravet N et al.[J].Journal of Power Sources,2006,160(02):1381-1386. |
| [9] | 向楷雄,郭华军,李新海,王志兴,罗文斌,李黎明.合成温度对Li2FeSiO4/C电化学性能的影响[J].功能材料,2008(09):1455-1457. |
| [10] | Nyten A;Kamali S;Haggstrom L;Gustafsson T;Thomas JO .The lithium extraction/insertion mechanism in Li2FeSiO4[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2006(23):2266-2272. |
| [11] | Nyten A;Stjerndahl M;Rensmo H;Siegbahn H;Armand M;Gustafsson T;Edstrom K;Thomas JO .Surface characterization and stability phenomena in Li2FeSiO4 studied by PES/XPS[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2006(34):3483-3488. |
| [12] | Ensling D;Stjerndahl M;Nyte′n A et al.[J].Journal of Materials Chemistry,2009,19(02):82-88. |
| [13] | R. Dominko;D.E. Conte;D. Hanzel;M. Gaberscek;J. Jamnik .Impact of synthesis conditions on the structure and performance of Li_2FeSiO_4[J].Journal of Power Sources,2008(2):842-847. |
| [14] | Gong Z L;Li Y X;Yang Y et al.[J].Electrochemical and Solid-State Letters,2006,9(12):A542-A544. |
| [15] | Hu G R;Liao G;Peng Z D et al.[J].Journal of Central South University of Technology(English Edition),2004,11(03):261-264. |
| [16] | Higuchi M;Katayama K;AzumaY et al.[J].Journal of Power Sources,2003,119-121:258-261. |
| [17] | 郝华,刘韩星,欧阳世翕.微波合成锂离子电池正极材料的电性能影响因素*[J].功能材料,2001(04):385-387. |
| [18] | Kazuyoshi UEMATSU;Ayumi OCHIAI;KenjiTODA .Solid Chemical Reaction by Microwave Heating for the Synthesis of LiFePO_4 Cathode Material[J].日本セラミックス协会学术论文志,2007(1343):450-454. |
| [19] | Liu HX;Hu C;Zhu XJ;Hao H;Luo JR;Zhou J;Ouyang SX .Solid chemical reaction in microwave and millimeter-wave fields for the syntheses of LiMn2O4 compound[J].Materials Chemistry and Physics,2004(2/3):290-294. |
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%