Enhancing electrical energy storage capability of dielectric polymer nanocomposites via the room temperature Coulomb blockade effect of ultra-small platinum nanoparticles

2018 ◽  
Vol 20 (7) ◽  
pp. 5001-5011 ◽  
Author(s):  
Liwei Wang ◽  
Xingyi Huang ◽  
Yingke Zhu ◽  
Pingkai Jiang
Keyword(s):  
Energy Storage ◽  
Coulomb Blockade ◽  
Room Temperature ◽  
Electrical Energy ◽  
Electrostatic Energy ◽  
Energy Storage Devices ◽  
Electrical Energy Storage ◽  
Storage Devices ◽  
High Dielectric ◽  
Dielectric Polymer

Introducing a high dielectric constant (high-k) nanofiller into a dielectric polymer is the most common way to achieve flexible nanocomposites for electrostatic energy storage devices.

PVDF–BaSrTiO3nanocomposites for flexible electrical energy storage devices

2014 ◽  
Vol 3 (6) ◽  
pp. 265-270 ◽  
Author(s):  
Shiva Adireddy ◽  
Venkata Sreenivas Puli ◽  
Samuel Charles Sklare ◽  
Tiffany Jialin Lou ◽  
Brian Charles Riggs ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrical Energy ◽  
Energy Storage Devices ◽  
Electrical Energy Storage ◽  
Storage Devices

scholarly journals Phenazine–Based Covalent Organic Framework Cathode Materials with High Energy and Power Densities

2019 ◽  
Author(s):  
Edon Vitaku ◽  
Cara Gannett ◽  
Keith Carpenter ◽  
Luxi Shen ◽  
Hector Abruna ◽  
...  
Keyword(s):  
Energy Storage ◽  
Conductive Polymer ◽  
Electrical Energy ◽  
High Energy ◽  
Energy Storage Devices ◽  
Electrical Energy Storage ◽  
Storage Devices ◽  
Redox Sites ◽  
Redox Active ◽  
Power Densities

Redox-active covalent organic frameworks (COFs) are promising materials for energy storage devices because of their high density of redox sites, permanent and controlled porosity, high surface areas, and tunable structures. However, the low electrochemical accessibility of their redox-active sites has limited COF-based devices either to thin films (<250 nm) grown on conductive substrates, or to thicker films (1 µm) when a conductive polymer is introduced into the COF pores. Electrical energy storage devices constructed from bulk microcrystalline COF powders, eliminating the need for both thin-film formation and conductive polymer guests, would offer both improved capacity and potentially scalable fabrication processes. Here we report on the synthesis and electrochemical evaluation of a new phenazine-based 2D COF (DAPH-TFP COF), as well as its composite with poly(3,4-ethylenedioxythiophene) (PEDOT). Both the COF and its PEDOT composite were evaluated as powders that were solution-cast onto bulk electrodes serving as current collectors. The unmodified DAPH-TFP COF exhibited excellent electrical access to its redox sites, even without PEDOT functionalization, and outperformed the PEDOT composite of a previously reported anthraquinone-based system. Devices containing DAPH-TFP COF were able to deliver both high energy (250 Wh/kg) and power densities (2950 W/kg), validating the promise of unmodified redox-active COFs that are easily incorporated into electrical energy storage devices.

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