Microsupercapacitors as miniaturized energy-storage components for on-chip electronics

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

This Review discusses the technical challenges and performance metrics to integrate micro-supercapacitors into miniaturized electronic devices.

Related collections

Most cited references 90

Record: found
Abstract: found
Article: not found

Laser scribing of high-performance and flexible graphene-based electrochemical capacitors.

Maher F El-Kady, Veronica A. Strong, Sergey Dubin … (2012)

Although electrochemical capacitors (ECs), also known as supercapacitors or ultracapacitors, charge and discharge faster than batteries, they are still limited by low energy densities and slow rate capabilities. We used a standard LightScribe DVD optical drive to do the direct laser reduction of graphite oxide films to graphene. The produced films are mechanically robust, show high electrical conductivity (1738 siemens per meter) and specific surface area (1520 square meters per gram), and can thus be used directly as EC electrodes without the need for binders or current collectors, as is the case for conventional ECs. Devices made with these electrodes exhibit ultrahigh energy density values in different electrolytes while maintaining the high power density and excellent cycle stability of ECs. Moreover, these ECs maintain excellent electrochemical attributes under high mechanical stress and thus hold promise for high-power, flexible electronics.

0 comments Cited 1067 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

Anomalous increase in carbon capacitance at pore sizes less than 1 nanometer.

J Chmiola, G Yushin, Y Gogotsi … (2006)

Carbon supercapacitors, which are energy storage devices that use ion adsorption on the surface of highly porous materials to store charge, have numerous advantages over other power-source technologies, but could realize further gains if their electrodes were properly optimized. Studying the effect of the pore size on capacitance could potentially improve performance by maximizing the electrode surface area accessible to electrolyte ions, but until recently, no studies had addressed the lower size limit of accessible pores. Using carbide-derived carbon, we generated pores with average sizes from 0.6 to 2.25 nanometer and studied double-layer capacitance in an organic electrolyte. The results challenge the long-held axiom that pores smaller than the size of solvated electrolyte ions are incapable of contributing to charge storage.

0 comments Cited 848 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

Ultrahigh-power micrometre-sized supercapacitors based on onion-like carbon.

David Pech, Magali Brunet, Hugo Durou … (2010)

Electrochemical capacitors, also called supercapacitors, store energy in two closely spaced layers with opposing charges, and are used to power hybrid electric vehicles, portable electronic equipment and other devices. By offering fast charging and discharging rates, and the ability to sustain millions of cycles, electrochemical capacitors bridge the gap between batteries, which offer high energy densities but are slow, and conventional electrolytic capacitors, which are fast but have low energy densities. Here, we demonstrate microsupercapacitors with powers per volume that are comparable to electrolytic capacitors, capacitances that are four orders of magnitude higher, and energies per volume that are an order of magnitude higher. We also measured discharge rates of up to 200 V s(-1), which is three orders of magnitude higher than conventional supercapacitors. The microsupercapacitors are produced by the electrophoretic deposition of a several-micrometre-thick layer of nanostructured carbon onions with diameters of 6-7 nm. Integration of these nanoparticles in a microdevice with a high surface-to-volume ratio, without the use of organic binders and polymer separators, improves performance because of the ease with which ions can access the active material. Increasing the energy density and discharge rates of supercapacitors will enable them to compete with batteries and conventional electrolytic capacitors in a number of applications.

0 comments Cited 769 times – based on 0 reviews      Review now

Bookmark

All references

Author and article information

Journal

Title: Nature Nanotechnology

Abbreviated Title: Nature Nanotech

Publisher: Springer Nature

ISSN (Print): 1748-3387

ISSN (Electronic): 1748-3395

Publication date Created: November 7 2016

Publication date (Print): November 7 2016

Volume: 12

Issue: 1

Pages: 7-15

Article

DOI: 10.1038/nnano.2016.196

PubMed ID: 27819693

SO-VID: 09b32eaa-02bf-4bc4-8fc8-9f1920325c13

History

Data availability:

Microsupercapacitors as miniaturized energy-storage components for on-chip electronics

Read this article at

Abstract

Related collections

Renewable Energy - Storage

Most cited references 90

Laser scribing of high-performance and flexible graphene-based electrochemical capacitors.

Anomalous increase in carbon capacitance at pore sizes less than 1 nanometer.

Ultrahigh-power micrometre-sized supercapacitors based on onion-like carbon.

Author and article information

Journal

Article

History

Comments

Comment on this article

Cited by 252

Most referenced authors 1,353