Cellulose binders for electric double-layer capacitor electrodes: The influence of cellulose quality on electrical properties

Andres, Britta; Dahlström, Christina; Blomquist, Nicklas; Norgren, Magnus; Olin, Håkan

doi:10.1016/j.matdes.2017.12.041

Cited by 43 publications

(29 citation statements)

References 19 publications

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“…The CNF preparation is based on the method www.nature.com/scientificreports www.nature.com/scientificreports/ described by Saito et al 30 with some modifications. A detailed description of the procedure are described by Andres et al 31 . After the chemical pretreatment, the suspension with a dry content of 2% was prepared and dispersed using an Ultra Turrax T50 and a dispersing element S50N-G45F (both from IKA-Werke GmbH & CO. KG) for 30 min at 8100 rpm to obtain the nanofibrils.…”

Section: Methodsmentioning

confidence: 99%

Influence of Substrate in Roll-to-roll Coated Nanographite Electrodes for Metal-free Supercapacitors

Blomquist

Koppolu

Dahlström

et al. 2020

Sci Rep

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Due to the high electric conductivity and large surface area of nanographites, such as graphene and graphite nanoplatlets, these materials have gained a large interest for use in energy storage devices. However, due to the thin flake geometry, the viscosity of aqueous suspensions containing these materials is high even at low solids contents. This together with the use of high viscosity bio-based binders makes it challenging to coat in a roll-to-roll process with sufficient coating thickness. Electrode materials for commercial energy storage devices are often suspended by organic solvents at high solids contents and coated onto metal foils used as current-collectors. Another interesting approach is to coat the electrode onto the separator, to enable large-scale production of flat cell stacks. Here, we demonstrate an alternative, water-based approach that utilize slot-die coating to coat aqueous nanographite suspension with nanocellulose binder onto the paper separator, and onto the current collector as reference, in aqueous metal-free supercapacitors. The results show that the difference in device equivalent series resistance (ESR) due to interfacial resistance between electrode and current collector was much lower than expected and thus similar or lower compared to other studies with a aqueous supercapacitors. This indicates that electrode coated paper separator substrates could be a promising approach and a possible route for manufacturing of low-cost, environmentally friendly and metal-free energy storage devices.

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Section: Methodsmentioning

confidence: 99%

Influence of Substrate in Roll-to-roll Coated Nanographite Electrodes for Metal-free Supercapacitors

Blomquist

Koppolu

Dahlström

et al. 2020

Sci Rep

Self Cite

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“…For instance, cellulosic pulp can be mixed with conducting graphite, which results in composites exhibiting both conductive and capacitive performance. 10 , 11 …”

Section: Introductionmentioning

confidence: 99%

Highly Conducting Nanographite-Filled Paper Fabricated via Standard Papermaking Techniques

Isacsson

Wang²,

Fall

et al. 2020

ACS Appl. Mater. Interfaces

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Eco-friendly and cost-effective materials and processes to manufacture functional substrates are crucial to further advance the area of printed electronics. One potential key component in the printed electronics platform is an electrically functionalized paper, produced by simply mixing common cellulosic pulp fibers with high-performance electroactive materials. Herein, an electronic paper including nanographite has been prepared using a standardized and scalable papermaking technique. No retention aid was needed to achieve a conducting nanographite loading as high as 50 wt %. The spontaneous retention that provides the integrity and stability of the nanographite paper, likely originates partially from an observed water-stable adhesion of nanographite flakes onto the fiber surfaces. The resulting paper exhibits excellent electrical characteristics, such as an in-plane conductivity of 107 S/cm and an areal capacitance of 9.2 mF/cm 2 , and was explored as the back-electrode in printed electrochromic displays.

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“…SC is a general term for electrical double-layer capacitors (EDLCs), pseudocapacitors (PCs) or hybrid capacitors. They are characterized by their fast charging process, relatively high power density, excellent cyclability and ease of fabrication [ 8 , 9 , 10 ]. EDLCs are considered as a potential alternative to conventional batteries.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Glycerolized Chitosan: NH4NO3-Based Polymer Electrolyte for Energy Storage Devices with Extremely High Specific Capacitance and Energy Density Over 1000 Cycles

et al. 2020

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In this work, plasticized polymer electrolyte films consisting of chitosan, ammonium nitrate (NH4NO3) and glycerol for utilization in energy storage devices was presented. Various microscopic, spectroscopic and electrochemical techniques were used to characterize the concerned electrolyte and the electrical double-layer capacitor (EDLC) assembly. The nature of complexation between the polymer electrolyte components was examined via X-ray diffraction analysis. In the morphological study, field emission scanning electron microscopy (FESEM) was used to investigate the impact of glycerol as a plasticizer on the morphology of films. The polymer electrolyte (conducting membrane) was found to have a conductivity of 3.21 × 10−3 S/cm. It is indicated that the number density (n), mobility (μ) and diffusion coefficient (D) of ions are increased with the glycerol amount. The mechanism of charge storing was clarified, which implies a non-Faradaic process. The voltage window of the polymer electrolyte is 2.32 V. It was proved that the ion is responsible for charge-carrying via measuring the transference number (TNM). It was also determined that the internal resistance of the EDLC assembly lay between 39 and 50 Ω. The parameters associated with the EDLC assembly are of great importance and the specific capacitance (Cspe) was determined to be almost constant over 1 to 1000 cycles with an average of 124 F/g. Other decisive parameters were found: energy density (18 Wh/kg) and power density (2700 W/kg).

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Cellulose binders for electric double-layer capacitor electrodes: The influence of cellulose quality on electrical properties

Cited by 43 publications

References 19 publications

Influence of Substrate in Roll-to-roll Coated Nanographite Electrodes for Metal-free Supercapacitors

Influence of Substrate in Roll-to-roll Coated Nanographite Electrodes for Metal-free Supercapacitors

Highly Conducting Nanographite-Filled Paper Fabricated via Standard Papermaking Techniques

Characteristics of Glycerolized Chitosan: NH4NO3-Based Polymer Electrolyte for Energy Storage Devices with Extremely High Specific Capacitance and Energy Density Over 1000 Cycles

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