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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Polymers02:34

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Spherical and Cylindrical Capacitor01:26

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A spherical capacitor consists of two concentric conducting spherical shells of radii R1 (inner shell) and R2 (outer shell). The shells have  equal and opposite charges of +Q and −Q, respectively. For an isolated conducting spherical capacitor, the radius of the outer shell can be considered to be infinite.
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To calculate the inductance of a solid cylindrical conductor, consider a 1-meter section of a non-magnetic, current-carrying conductor with radius r. Disregarding end effects and assuming uniform current density, Ampere's law helps determine the magnetic field inside the conductor. This law states that the magnetic field intensity H is concentric and constant within the conductor.
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Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
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General Interfacial Self-Assembly Engineering for Patterning Two-Dimensional Polymers with Cylindrical Mesopores on

Hao Tian1, Jieqiong Qin2,3, Dan Hou1

  • 1School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.

Angewandte Chemie (International Ed. in English)
|May 30, 2019
PubMed
Summary

Researchers developed novel 2D porous polymer films on graphene for planar energy storage. These advanced materials enable high-performance micro-supercapacitors (MSCs) with excellent volumetric capacitance and energy density.

Keywords:
2D nanomaterialsblock copolymersinterface self-assemblymesoporous structuresmicro-supercapacitors

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Free-standing 2D porous nanomaterials are promising for planar energy storage devices.
  • Achieving well-defined mesopore arrays for fast in-plane ion diffusion remains a significant challenge.

Purpose of the Study:

  • To develop a universal strategy for patterning 2D porous polymers with controlled mesopore structures.
  • To fabricate and evaluate planar micro-supercapacitors (MSCs) using these novel nanohybrid materials.

Main Methods:

  • Utilized an interface self-assembly strategy to pattern 2D porous polymers (polypyrrole, polyaniline, polydopamine) with cylindrical mesopores on graphene nanosheets.
  • Constructed 2D sandwich-structured nanohybrids.
  • Fabricated interdigital microelectrodes for planar MSCs.

Main Results:

  • The fabricated planar MSCs achieved a high volumetric capacitance of 102 F/cm³ and an energy density of 2.3 mWh/cm³.
  • Performance surpassed most previously reported MSCs.
  • The MSCs demonstrated remarkable flexibility and enhanced integration for improved output voltage and capacitance.

Conclusions:

  • The interface self-assembly strategy offers a universal approach for creating advanced 2D porous polymer/graphene nanohybrids.
  • These nanohybrids are highly effective for high-performance planar energy storage applications.
  • The developed MSCs show significant potential for flexible and integrated energy storage solutions.