采用溶胶凝胶法,结合相转移法和碱液活化法制备了PVA/SiO2碱性微孔聚合物电解质,通过SEM、XRD、交流阻抗法和循环伏安法表征了电解质的结构与电化学性能.研究表明,PVA/5ωSiO2(ω为质量分数)共混膜上的微孔大小合适,聚合物电解质的离子电导率最大可达1.62×10-2 S cm-1,电化学稳定窗口2 V以上;将PVA/SiO2碱性微孔电解质组装成聚合物镁基镍氢电池,与传统镍氢电池相比,循环稳定性大大增加. 相似文献
以2-丙烯酰胺基-2-甲基丙磺酸(AMPS)作引发剂引发交联聚乙烯醇(PVA)-戊二醛(GA)制备水凝胶聚合物电解质并组装成超级电容器.分别由红外光谱、交流阻抗、循环伏安与恒电流充放电曲线测定该凝胶聚合物电解质及超级电容器的电化学性能.结果表明,该聚合物电解质电导率可达1.23 mS/cm(室温).而且,以1.0 g AMPS引发0.05mL GA(5 %)与1.0 g PVA交联,制得的凝胶聚合物电解质超级电容器比电容可达139F/g,50次充放电后其值仍于80%以上. 相似文献
This study reports a continuous prepartion of spherical or hemispherical polymer particles simply utilizing the phase separation in polymer blend films during the coating process. We took an advantage of the strong phase separation between a water‐soluble crystalline polymer as a matrix and hydrophobic polymers as minor components. We demonstrated the prepartion of water‐soluble polystyrene (PS) particles, nitrilotriacetic acid (NTA)‐functionalized PS particles for protein separation, and semiconducting poly(3‐hexylthiophene) (P3HT) particles. The sizes of the particles could be controlled by adjusting the film thickness and weight fraction of the minor component polymers in the blend film. It provides a simple facile way to prepare polymer particles in a continous process.
Most of efficient polymer electron acceptors for polymer solar cells (PSCs) are based on naphthalene diimide or perylene diimide as the electron deficient building block. In this paper, for the first time, we report polymer electron acceptors based on fluorinated isoindigo (F‐IID) as the electron deficient building block. We synthesized two polymer electron acceptors consisting of alternating F‐IID unit and thiophene/selenophen unit. They show low‐lying LUMO/HOMO energy levels of –3.69/–5.69 eV, high electron mobilities of 1.31×10–5 cm2·V–1·s–1 and broad absorption spectra with the optical bandgap of 1.61 eV. PSC devices using the two F‐IID‐based polymers as polymer electron acceptors show encouraging power conversion efficiencies (PCEs) of up to 1.50% with an open‐circuit voltage (VOC) of 0.97 V, a short‐circuit current density (JSC) of 2.91 mA·cm–2, and a fill factor (FF) of 53.2%. This work suggests a new kind of polymer electron acceptors based on F‐IID unit. 相似文献