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PVDF-based Ionogel electrolytes enabled All-climate high-performance supercapacitors
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DOI：10.1016/j.colsurfa.2026.141474.png)
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Abstract
En 中文
A PVDF-based composite ionogel electrolyte enables a YP-80F symmetric supercapacitor to achieve a high energy density of 55.4 Wh kg−1 at 2.7 V, while maintaining stable operation from room temperature to 100 ℃ and 87.1% capacitance retention after 10,000 cycles at 5 A g−1. The enhanced electrochemical performance is attributed to a nano-Al2O3/ionic liquid synergistic regulation strategy, where nano-Al2O3 suppresses PVDF crystallization, promotes the formation of ion-transport pathways, and enhances electrolyte/electrode interfacial stability. The composite ionogel electrolyte fabricated by a facile solution-casting method integrates high ionic accessibility and thermal stability, overcoming the trade-off between energy density and temperature tolerance commonly encountered in conventional polymer electrolytes. Compared with traditional gel electrolytes, the developed ionogel exhibits an improved capability for maintaining reliable electrochemical performance under elevated temperatures. This work provides a nanofiller-assisted electrolyte design strategy for constructing high-energy-density supercapacitors with broad operating temperature windows and long-term cycling stability.
Keywords:
PVDF
Ionogel Electrolytes
Supercapacitor
Electrochemical energy storage
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5.4
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153
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