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题名	低维钛氧化物纳米粒子复合聚合物电解质制备与性能研究
作者	陈赟
学位类别	硕士
答辩日期	2012-05-29
授予单位	中国科学院研究生院
导师	谭强强 ;    徐宇兴
关键词	超级电容器 聚合物电解质 纳米复合 钛氧化物 循环性能
其他题名	Study on Preparation and Performance of Low-Dimensional Titanium Oxide Nano-composited Polymer Electrolyte
学位专业	材料工程
中文摘要	超级电容器是一种新型储能元件，具有高于静电电容器的能量密度以及高于二次电池的功率密度。使用液态电解质的超级电容器存在易燃易爆、易造成泄漏污染等问题，而使用聚合物电解质的超级电容器则安全、无泄漏、无污染，因此成为当前研究的热点。然而，聚合物电解质与液态电解质相比一般电导率较低、循环稳定性较差。针对这一问题，本文制备了纳米复合聚合物电解质，显著提高了其电导率与循环稳定性，且制备方法简单，易于加工成型与使用。本文采用低维纳米钛氧化物与聚合物电解质复合的方法，制备了具有良好电化学性能的TiO2-B纳米线复合PVA聚合物电解质材料，其室温下电导率提高了约30%，达3.2×10?3 S/cm。而TiO2-B纳米线与PMMA 复合的聚合物电解质，电压稳定窗口高于3V，室温下电导率能够达到4.6×10?3 S/cm。分别制备了ZnO、SiO2和Al2O3三种纳米材料，并将其与PMMA基聚合物电解质进行复合，研究发现，仅纳米Al2O3复合聚合物电解质的电导率最高为1.23×10?3 S/cm，另外两种复合聚合物电解质只能达到10?4 S/cm数量级。研究结果表明，在对PMMA聚合物电解质进行复合时，TiO2-B纳米线的引入相对了ZnO、SiO2和Al2O3三种纳米材料能够显著地提高离子电导率。将制备的纳米复合聚合物电解质组装成超级电容器进行电化学性能测试，结果发现PVA纳米复合聚合物电解质与活性炭电极组合制成的超级电容器在10mV/s的循环伏安测试下比容量达到99.14F/g，并且循环充放电5000次后仍能保持90%以上的容量。而PMMA聚合物电解质组装成的超级电容器比容量更高，同等条件下达到220.94F/g。
英文摘要	Supercapacitor is a new kind of energy storage device with higher energy density than static capacitors and higher power density than the secondary batteries. However， supercapacitor with liquid electrolyte is inflammable, explosive, and could easily lead to leakage of pollution and other problems. On the contrary, polymer electrolyte is safe, with no leakage and no pollution. But the ionic conductivity of polymer electrolyte is lower than liquid electrolyte. To solve this problem, nano-composite polymer electrolyte (CPE) was prepared. The casting method of CPE film and application of are simple. The ionic conductivity and stability of CPE film are higher than the non-composite polymer electrolyte. The CPE can be effectively used in supercapacitor to reduce its internal resistance, and effectively improve its cycle stability. The Low-dimensional titanium oxide nanowire was prepared, and it was composited with polymer electrolyte. The ionic conductivity of TiO2-B nanowire composite PVA polymer electrolyte can reach a maximum value of 3.2×10-3 S/cm at room temperature. That is about 30% more than the non-composite electrolyte. The voltage stability window of PMMA polymer electrolyte composited with TiO2-B nanowire is higher than 3V, and its conductivity at room temperature is 4.6×10-3 S/cm, higher than that of PVA polymer electrolyte and non-composite PMMA polymer electrolyte. ZnO, SiO2 and Al2O3 nano-materials were prepared and composited with PMMA-based polymer electrolyte. It is found that the ionic conductivity of ZnO, Al2O3 and SiO2 composite polymer electrolyte did not reach the level of non-composite electrolyte. Only the conductivity of nano-Al2O3-composite polymer electrolyte reaches 1.23×10-3 S/cm, the conductivities of other two composite electrolytes can only reach the order of 10-4 S/cm. This result suggests that the TiO2-B nanowire is better than other three types of nano material in the ability to improve the ionic conductivity of PMMA polymer electrolyte. Supercapacitor was prepared using nano-composite polymer electrolyte to test their electrochemical performance. It is found that the specific capacitance of supercapacitor made by combination of the PVA nano-composite polymer electrolyte with activated carbon electrode comes up to 99.14F/g at the scan rate of 10mV/s. The specific capacitance of supercapacitor with PMMA polymer electrolyte can even reaches 220.94 F/g. The nano-composite PVA electrolytic capacitor keeps more than 90% of capacitance after 5000 charging-discharging cycles.
语种	中文
公开日期	2013-09-25
内容类型	学位论文
源URL	[http://ir.ipe.ac.cn/handle/122111/1812]
专题	过程工程研究所_研究所（批量导入）
推荐引用方式 GB/T 7714	陈赟. 低维钛氧化物纳米粒子复合聚合物电解质制备与性能研究[D]. 中国科学院研究生院. 2012.

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