A5060576923- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- Advanced Cellulose Research Studies
- Advancements in Battery Materials
- Electrochemical sensors and biosensors
- Electrospun Nanofibers in Biomedical Applications
- Green IT and Sustainability
- Extraction and Separation Processes
- Advanced Battery Materials and Technologies
- Microbial Fuel Cells and Bioremediation
- Electrical and Thermal Properties of Materials
- Magnetic Properties and Applications
- Advanced Battery Technologies Research
- Fuel Cells and Related Materials
- Magnetic and transport properties of perovskites and related materials
- Library Collection Development and Digital Resources
- Electrocatalysts for Energy Conversion
- Recycling and Waste Management Techniques
- Advanced Materials and Semiconductor Technologies
- Magnetic properties of thin films
- Aerogels and thermal insulation
- Hybrid Renewable Energy Systems
- Advanced Energy Technologies and Civil Engineering Innovations
- Hydrogen Storage and Materials
Uppsala University
2014-2024
Angstrom Designs (United States)
2014-2015
We demonstrate that surface modified nanocellulose fibers (NCFs) can be used as substrates to synthesize supercapacitor electrodes with the highest full electrode-normalized gravimetric (127 F g(-1)) and volumetric (122 cm(-3)) capacitances at high current densities (300 mA cm(-2) ≈ 33 A until date reported for conducting polymer-based active mass loadings 9 mg cm(-2). By introducing quaternary amine groups on of NCFs prior polypyrrole (PPy) polymerization, macropore volume formed PPy-NCF...
One of the biggest challenges we will face over next few decades is finding a way to power future while maintaining strong socioeconomic growth and clean environment. A transition from use fossil fuels renewable energy sources expected. Cellulose, most abundant natural biopolymer on earth, unique, sustainable, functional material with exciting properties: it low‐cost has hierarchical fibrous structures, high surface area, thermal stability, hydrophilicity, biocompatibility, mechanical...
A robust and flexible nanocellulose coupled PPy@GO paper electrode is straightforwardly prepared, exhibiting a capacitance of 198 F cm<sup>−3</sup>(301 cm<sup>−3</sup>based on PPy) ever reported for polymer-based electrodes.
Nanostructured flexible PEDOT paper can be constructed by straightforward chemical polymerization on nanocellulose building blocks, yielding a high surface area, low sheet resistance and outstanding capacitive performance.
Rational design of high capacity, flexible Si paper anodes based on 3D conductive<italic>Cladophora</italic>nanocellulose matrix.
It is demonstrated that 3D nanostructured polypyrrole (3D PPy) nanocomposites can be reinforced with PPy covered nanocellulose (PPy@nanocellulose) fibres to yield freestanding, mechanically strong and porosity optimised electrodes large surface areas. Such PPy@nanocellulose materials employed as free-standing paper-like in symmetric energy storage devices exhibiting cell capacitances of 46 F g(-1), corresponding specific electrode up ∼185 g(-1) based on the weight electrode, 5.5 cm(-2) at a...
Dense, yet porous, all-polymer thick paper electrodes are constructed by compression of PPy@nanocellulose composites. When used in symmetric supercapacitors, these yield a device volumetric energy density 3.7 W h L<sup>−1</sup>as well as the highest specific capacitance (236 F cm<sup>−3</sup>) and areal (5.66 cm<sup>−2</sup>) ever shown for conducting polymer-based electrodes.
A novel approach is employed to fabricate free-standing and additive-free paper electrodes containing up 90 wt% polypyrrole (PPy), with PPy mass loadings 20 mg cm<sup>−2</sup>, which demonstrates excellent charge storage performance for paper-based energy devices.
Asymmetric, all-organic supercapacitors (containing an aqueous electrolyte), exhibiting a capacitance of 25 F g<sup>−1</sup>(or 2.3 cm<sup>−2</sup>) at current density 20 mA cm<sup>−2</sup>and maximum cell voltage 1.6 V, are presented.
Abstract Conducting polymers have been considered for use as cathode materials in rechargeable lithium‐ion batteries (LIBs) since 1981 but problems with poor cycling stability, rapid self‐discharge, and low energy power densities so far limited their applicability. Herein it is shown that nanostructured freestanding conducting polymer composites [e.g., polypyrrole (PPy) polyaniline (PANI)] can be used to circumvent these shortcomings. Freestanding binder‐free PPy cellulose‐based...
A wide array of carbon materials finds extensive utility across various industrial applications today. Nonetheless, the production processes for these continue to entail elevated temperatures, necessitate use inert atmospheres, and often involve handling aggressive toxic chemicals. The prevalent method large-scale material production, namely pyrolysis waste biomass polymers, typically unfolds within temperature range 500-700 °C under a nitrogen (N