Preparation and Photoelectric Conversion Performance of High Stability Phase Change Energy Storage Composite
Phase change composites with PEG as matrix and PLA and CNTs as support structures were prepared by solution method.The microstructure shows that CNTs are distributed in a similar"isolated"structure in PEG phase-change composites,and the threshold of conductive percolation of PEG phase-change composites is significantly reduced from 0.46％(PLA/CNTs)to 0.13％(PEG/PLA/CNTs).In addition,the PEG/PLA/CNTs phase change composite can maintain good thermal cycle stability and chemical structure in 100 thermodynamic cycle tests,and can maintain good shape stability at 160 ℃,without PEG leakage and collapse phenomenon.The thermosensitive response behavior of the PEG/PLA/CNTs composites shows that the transition from PTC effect to NTC effect is realized.With the increase of test temperature,the energy storage platform of PCM gradually becomes wider,up to 37.2 min.In the test of photo-electric-thermal effect,it is found that the PEG/PLA/CNTs composites show energy storage effect and photoelectric conversion efficiency(η)at different light intensities.η of the composites reaches 42.9％at a light intensity of 150 mW/cm2,and η of the composites increases with the increase of light intensity.
万方数据
维普
