Versatile carbon-loaded shellac ink for disposable printed electronics

Poulin, Alexandre; Aeby, Xavier; Siqueira, Gilberto; Nyström, Gustav

doi:10.1038/s41598-021-03075-4

Cited by 29 publications

(24 citation statements)

References 50 publications

(43 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As has been already reported, the presence of carbon black particles ensures good electrical contact between the graphite flakes. [ 26 ] The current collector prepared using graphite, carbon black, and chitin in a mass ratio of 7:2:1 features outstanding flexibility, desirable mechanical strength, and excellent electrical conductivity (7.0 ± 4.5 Ω cm −1 ). The active electrode layer coated on the current collector was composed of MXene, carbon black, and chitin.…”

Section: Resultsmentioning

confidence: 99%

Wearable and Flexible All‐Solid‐State Supercapacitor Based on MXene and Chitin

et al. 2023

View full text Add to dashboard Cite

Biopolymer‐based materials have recently received great interest as potential components for wearable energy‐storage devices. They can offer attractive and valuable properties such as renewability, biocompatibility, thermal and chemical stability, flexibility, durability, and biodegradability. Herein, a wearable and flexible all‐solid‐state supercapacitor that uses chitin as a biocompatible scaffold for integrating all device components, such as electrodes and an electrolyte, is developed. Chitin provides mechanical stability to electrode materials and supports the ionic liquid‐based gel electrolyte, and it also acts as a bonding agent to integrate all those components. Additionally, titanium carbide MXene is used as an active material for the proposed power source device. The MXene/chitin‐based all‐solid‐state supercapacitor exhibits impressive electrochemical performance, showing outstanding electrode conductivity, high capacitance, low internal resistance, high power density, and long‐term cycling stability. Moreover, it provides highly desired features concerning wearable devices, that is, excellent flexibility and mechanical strength under bending deformations, as well as sustainability and biodegradability. As a proof of concept, the MXene/chitin‐base device is applied for powering an electronic gadget. Herein, an important step is represented toward power‐efficient, wearable, and sustainable energy‐storage devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Wearable and Flexible All‐Solid‐State Supercapacitor Based on MXene and Chitin

et al. 2023

View full text Add to dashboard Cite

show abstract

“…While metals such as aluminum and copper are typically used as current collector, their use for disposable electronics is a waste of valuable resources. Our current collector ink is composed of graphite flakes, carbon black, shellac and ethanol 23 . The graphite flakes (Fig.…”

Section: Resultsmentioning

confidence: 99%

Water activated disposable paper battery

Poulin

Aeby

Nyström

2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

We developed a disposable paper battery aiming to reduce the environmental impact of single-use electronics for applications such as point of care diagnosis, smart packaging and environmental sensing. The battery uses Zinc as a biodegradable metal anode, graphite as a nontoxic cathode material and paper as a biodegradable substrate. To facilitate additive manufacturing, we developed electrodes and current collector inks that can be stencil printed on paper to create water-activated batteries of arbitrary shape and size. The battery remains inactive until water is provided and absorbed by the paper substrate, taking advantage of its natural wicking behavior. Once activated, a single cell provides an open circuit potential of 1.2 V and a peak power density of 150 µW/cm2 at 0.5 mA. As a proof of concept, we fabricated a two cell battery and used it to power an alarm clock and its liquid crystal display.

show abstract

“…Based on the thermal characterization, we further explored the application of the HPC‐CNT‐CNF ink as a color display. We prepared a seven‐segment pattern consisting of stencil printed shellac‐based carbon conductive ink [ 32 ] on cellulose substrate. The HPC‐CNT‐CNF ink was then printed on top of the seven‐segment pattern and ultimately encapsulated with glass, as schematized in Figure 4F–1.…”

Section: Resultsmentioning

confidence: 99%

Printed Structurally Colored Cellulose Sensors and Displays

Wei

Aeby

Nyström

2022

Adv Materials Technologies

Self Cite

View full text Add to dashboard Cite

of these processes include response to changes in the environment for concealment, communication, and temperature management. A well-known example is the ability of chameleons to change the color of their skin forming a protective tint to ward off predators and protect themselves. [1] To achieve this function, chameleons can tighten or relax their skin to change the crystalline structure under the skin's surface, causing a wavelength shift of reflected light and ultimately a color change. [2][3][4] This structural color is a typical occurrence in nature and a significant determinant of life activities. Physically, structural color is a phenomenon caused by Bragg reflection of light in materials that are organized in a periodic pattern whose repeating distance times the refractive index falls within the wavelength of the visible spectrum. [5] Liquid crystals are one class of materials capable of presenting structural colors. Colloids or mesogens arrange in a layered nematic or a twisted so-called chiral nematic or cholesteric arrangement with a helicoidal twist. [5] In the latter, each layer of the nematic phase is slightly twisted with respect to the following layer, while the distance between each layer defines the wavelength of the reflected light. Artificial structural color films have been successfully manufactured utilizing self-assembly and applied at a large scale using roll-to-roll or layer-by-layer methods. [6][7][8] However, the color portrayed in these films is generally fixed due to the stable and rigid structure that they form. [9][10][11] Materials that dynamically change color in response to an external stimulus, such as electrochromic, photochromic, and thermochromic materials, have also emerged. [12][13][14] Although they provide easily tunable color, these materials typically rely on complex and expensive chemical synthesis and are hazardous or non-environmentally friendly. Recently, scientists have developed flexible materials that can be stretched to change color with mechanical stimuli. Even though they provide easily tunable color, these materials are still constrained by the difficulties of their preparation procedures and are not ideal for mass manufacturing. [15][16][17] In search of materials that are non-toxic, biodegradable, and cost-effective, hydroxypropyl cellulose (HPC) is a cellulose derivative emerging as an attractive candidate for stimuli-responsive colored materials. [18] HPC spontaneously forms cholesteric liquid crystal in an aqueous solution and allows Bragg reflection of circularly polarized light in the visible range. [19][20][21] Furthermore, HPC concentration, temperature and additives can affect the strucural color, opening up for the design of multifunctional materials responding to more than one stimuli. [22][23][24][25]

show abstract

Versatile carbon-loaded shellac ink for disposable printed electronics

Cited by 29 publications

References 50 publications

Wearable and Flexible All‐Solid‐State Supercapacitor Based on MXene and Chitin

Wearable and Flexible All‐Solid‐State Supercapacitor Based on MXene and Chitin

Water activated disposable paper battery

Printed Structurally Colored Cellulose Sensors and Displays

Contact Info

Product

Resources

About