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Related Concept Videos

Energy Stored in Capacitors01:10

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A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
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Development of a 3D Graphene Electrode Dielectrophoretic Device
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3D Printed Graphene Based Energy Storage Devices.

Christopher W Foster1, Michael P Down1, Yan Zhang2

  • 1Faculty of Science and Engineering, Manchester Metropolitan University, Chester Street, Manchester M15 GD, UK.

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|March 4, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed low-cost, 3D printed graphene/polylactic acid disc electrodes. These electrodes serve as efficient freestanding anodes for Li-ion batteries and supercapacitors, and show promise for hydrogen evolution reactions.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • 3D printing offers rapid prototyping for low-cost platforms.
  • Graphene-based filaments enable novel electrode fabrication.
  • Conventional energy storage devices often require current collectors.

Purpose of the Study:

  • To fabricate and characterize 3D printed graphene/polylactic acid disc electrodes (3DEs).
  • To evaluate 3DEs as freestanding anodes in Li-ion batteries and solid-state supercapacitors.
  • To assess the potential of 3DEs for hydrogen evolution reactions (HER).

Main Methods:

  • Fused deposition molding (FDM) 3D printing of graphene/PLA filament.
  • Electrochemical and physicochemical characterization of 3DEs.
  • Application testing in Li-ion batteries, supercapacitors, and HER.

Main Results:

  • 3D printed electrodes functioned as effective freestanding anodes, eliminating the need for current collectors.
  • The 3DEs exhibited promising performance in Li-ion batteries and solid-state supercapacitors.
  • Electrodes demonstrated significant catalytic activity for HER, approaching platinum-based electrode performance after 1000 cycles.

Conclusions:

  • 3D printing of graphene-based filaments provides a simple method for fabricating custom energy storage devices.
  • Freestanding 3D printed electrodes offer a cost-effective alternative to traditional designs.
  • The developed 3DEs show potential for both energy storage and electrocatalysis applications.