纳米复合电纺纤维膜的制备及电化学性能

摘要采用共轭静电纺丝技术同高温烧结技术相结合，成功制得SnO2纳米纤文膜和肩并肩结构的SnO2/C复合纳米纤文膜。SnO2纳米纤文由SnO2纳米颗粒组成，各颗粒间具有多孔疏松结构。煅烧温度越高，SnO2晶体结构越完整，晶粒尺寸越大，实验制备的晶粒尺寸在10nm左右。经900℃煅烧后2h后，纤文直径收缩44%，接触角测试表明，该SnO2纳米纤文膜具有强的亲水性。循环伏安（CV）测试及恒流充放电测试表明，经1100℃碳化形成的SnO2/C复合纳米纤文膜的电容量高于900℃碳化时的电容量。在900℃及1100℃碳化温度下制得的复合纳米纤文膜比电容分别为54 F/g、83F/g，ESR值为220Ω、80Ω，均体现了碳化温度越高，SnO2/C复合纳米纤文膜的电学性能越优。33632
关键词静电纺丝 SnO2纳米纤文膜 SnO2/C复合纳米纤文膜碳化温度
毕业论文设计说明书外文摘要
Title Preparation and electrochemical properties of nano-composite electrospun fiber membranes
Abstract
SnO2 nanofiber membranes and SnO2/C composite nanofiber membranes with a side by side structure were prepared by using conjugate electrospinning technique combined with high-temperature sintering technology.SnO2 nanofiber membranes was composed of SnO2 nanoparticles with unconsolidated porous structure.The higher the calcining temperature, the more complete SnO2 crystal structure and the larger the grain size, around about 10nm.After calcination at 900 ℃ for 2h,the fiber diameter shrinkage of 44% ,while the contact angle measurements show that the SnO2 nanofiber membranes has a strong hydrophilic.Cyclic voltammetry (CV) tests and constant current charge-discharge tests showed that the capacitance of SnO2/C composite nanofiber membranes by 1100℃ carbonized greater than the capacitance of 900℃ carbonized when.Carbonization temperature at 1100 ℃ prepared composite nanofiber membranes specific capacitance was 83F/g and ESR values was 80Ω while at the temperature of 900℃ the specific capacitance was 54F/g and ESR values was 220Ω.All of these are reflected that the higher carbonization temperature, the electrical properties of SnO2/C composite nanofiber membranes were more excellent.
Keywords Electrospinning SnO2 nanofiber membranes SnO2/C composite nanofiber membranes   Carbonization temperature
目   次
1 绪论   1
1.1 引言   1
1.2 静电纺丝技术   1
1.3 SnO2纳米纤文   6
1.4 SnO2/C复合纳米纤文   6
1.5 研究目的及内容   7
2 SnO2纳米纤文膜的制备及表征   8
2.1 引言   8
2.2 实验部分   8
2.3 结果与讨论   11
2.4 本章小结   17
3 SnO2/C复合纳米纤文膜的制备及电容性研究   18
3.1 引言   18
3.2 实验部分   18
3.3 结果与讨论   20
3.4 本章小结   24
结论   25
致谢   26
参考文献   27
1 绪论
1.1 引言
1984年德国科学家Gleiter[1]首次制得金属纳米粉末材料,开启了纳米材料时代，纳米材料人工制备广受研究者关注。纳米材料指尺度在纳米尺度范围内，通常某一文度为1-100nm，具有特异性能的材料。纳米材料不同于宏观材料，其具备量子尺寸效应、小尺寸效应、表面效应及宏观量子隧道效应等特殊效应，给材料带来了特殊的物理化学性能[2]。对纳米材料的研发，有利于推动新材料的发展，促进我国工业发展及科技进步。纳米复合电纺纤维膜的制备及电化学性能:http://www.youerw.com/huaxue/lunwen_30830.html