In this study,the authors proposed a promising structure design,the micro-crosslinked polypropylene(PP),to enhance the high-temperature energy storage density.With the grafting of 1,6,7,12-tetrachlorinated perylene-N-...In this study,the authors proposed a promising structure design,the micro-crosslinked polypropylene(PP),to enhance the high-temperature energy storage density.With the grafting of 1,6,7,12-tetrachlorinated perylene-N-2-aminoethyl acrylate-Nʹ-dodecylamine-3,4,9,10-tetracarboxylic bisimide(PTCDA)onto PP molecules,the obtained PP-g-PTCDA achieved a superior energy storage density of 2.34 J/cm^(3)at 120℃ with the discharge efficiency above 90%,which was 585%higher than that of neat PP.The great enhancement,on the one hand,originated from the micro-crosslinked structure,since the restricted molecular motion can lead to the suppression of electrons'hopping across the molecular chains.On the other hand,deep traps were also introduced in PP-g-PTCDA,which restricted the electrons'hopping along the molecular chains simultaneously.This work provided an orientation to enhance the energy storage density at an elevated temperature of 120℃.展开更多
基金National Natural Science Foundation of China,Grant/Award Numbers:52077163,52107025。
文摘In this study,the authors proposed a promising structure design,the micro-crosslinked polypropylene(PP),to enhance the high-temperature energy storage density.With the grafting of 1,6,7,12-tetrachlorinated perylene-N-2-aminoethyl acrylate-Nʹ-dodecylamine-3,4,9,10-tetracarboxylic bisimide(PTCDA)onto PP molecules,the obtained PP-g-PTCDA achieved a superior energy storage density of 2.34 J/cm^(3)at 120℃ with the discharge efficiency above 90%,which was 585%higher than that of neat PP.The great enhancement,on the one hand,originated from the micro-crosslinked structure,since the restricted molecular motion can lead to the suppression of electrons'hopping across the molecular chains.On the other hand,deep traps were also introduced in PP-g-PTCDA,which restricted the electrons'hopping along the molecular chains simultaneously.This work provided an orientation to enhance the energy storage density at an elevated temperature of 120℃.
