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関連する概念動画

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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...
DC Battery01:21

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A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
The Electrical Double Layer01:30

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In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
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Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...

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Combustion Characterization and Model Fuel Development for Micro-tubular Flame-assisted Fuel Cells
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空気を吸うラミナールフローベースのマイクロ流体燃料電池

Ranga S Jayashree1, Lajos Gancs, Eric R Choban

  • 1Department of Chemical & Biomolecular Engineering, University of Illinois at Urbana-Champaign, 61801, USA.

Journal of the American Chemical Society
|December 1, 2005
PubMed
まとめ

この研究では,新しいガス拡散電極を搭載した空気吸入型微流体燃料電池 (LFFC) が導入されています. この設計は,酸素輸送を改善し,以前の制限を克服することによって,電力密度を大幅に高めます.

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科学分野:

  • 電気化学 電気化学について
  • 化学工学は化学工学というものです.
  • マテリアルサイエンス 材料科学

背景:

  • 以前のラミナールフローベースの微流体燃料電池 (LFFC) は,酸素の溶解性が悪くて水中での輸送が遅いため,カソドの制限に苦しんでいました.
  • これらの質量移転問題は,燃料電池の全体的な性能と電力密度を阻害しました.

研究 の 目的:

  • 改良された空気吸入型,ラミナールフローベースの微流体燃料電池 (LFFC) の設計と特徴付け.
  • 以前のLFFC設計で観察されたカソド限定性能の問題に対処し,克服するために.

主な方法:

  • カソードとして空気呼吸ガス拡散電極を組み込む.
  • キノコ酸燃料と空気カトドを使用したLFFC性能の特徴.
  • 水性酸素源を使用した以前のLFFC設計と電力密度の比較.

主要な成果:

  • 空気を吸うLFFC設計は,空気中の酸素拡散が高くなるため,カトドでの酸素補給を大幅に強化します.
  • 26mW/cm2の電力密度を達成し,以前の設計と比較して5倍に増加しました (約. 5 mW/cm2) となっている.
  • カソド質量移転制限を緩和し,燃料電池のさらなる最適化を可能にします.

結論:

  • 空気呼吸ガス拡散電極は,LFFCにおける酸素輸送の制限を効果的に解決します.
  • この進歩は,燃料利用率と電極性能の向上の可能性を明らかにします.
  • 空気吸入型LFFCは,将来の微流体エネルギーアプリケーションに有望な利点を提供します.