AI Article Synopsis
- Developing environmentally friendly biomass materials for energy storage is vital for sustainable progress, with novel films made from cellulose acetate (CA) and carbonized polymer dots (CPDs) showing promise.
- These composite films exhibit increased breakdown strength (E) of 520.58 MV/m, significantly higher than pure CA, and an enhanced energy density (U) of 2.55 J/cm, indicating improved performance.
- The addition of CPDs enhances mechanical properties and dielectric performance by improving matrix entanglement and reducing energy loss, paving the way for future eco-friendly composite films in energy applications.
Article Abstract
Developing green and environmentally friendly biomass materials for energy storage and application is of great significance to sustainable development. Novel composite films containing cellulose acetate (CA) and carbonized polymer dots (CPDs) are reported herein. The CPDs have strong hydrogen bonding interactions with CA matrix, in which CPDs act as the physical crosslinking points and enhance the entanglement density of the matrix. And the composite films demonstrate a significant enhancement in breakdown strength (E), reaching up to 520.58 MV/m with the addition of 0.1 wt% CPDs (1.62 times higher than 321.94 MV/m of pure CA). Furthermore, the discharging energy density (U) achieves 2.55 J/cm at 450 MV/m, which is 1.36 times higher than that of the pure CA film (1.87 J/cm at 400 MV/m) and simultaneously, the energy efficiency (η) is maintained at 73.3 %. The Coulomb-blockade effect induced by the ultra-low content of CPDs effectively inhibiting carrier migration, and the enhanced entanglement density of the matrix improving mechanical properties and reducing polarization loss, mainly contribute to the enhanced dielectric performances. Furthermore, CPDs also improve the mechanical properties of the composite films apparently. This work provides some references for the fabrication of the next generation of environmentally friendly dielectric composite films.
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| http://dx.doi.org/10.1016/j.carbpol.2024.122752 | DOI Listing |
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