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関連する概念動画

Capacitor With A Dielectric01:18

Capacitor With A Dielectric

Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Capacitor in an AC Circuit01:23

Capacitor in an AC Circuit

A capacitor is charged by passing an electric current through it, which causes the plates to start accumulating an electrostatic charge. Since the strength of the charging current is maximum when the capacitor plates are uncharged and gradually decreases exponentially until the capacitor is fully charged, the charging process is neither instantaneous nor linear. The property of a capacitor to store a charge on its plates is called its capacitance.
Consider a purely capacitive circuit consisting...
MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
Capacitors01:15

Capacitors

Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
Equivalent Capacitance01:19

Equivalent Capacitance

Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
Equivalent Capacitance01:19

Equivalent Capacitance

From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...

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関連する実験動画

Updated: Jun 8, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

Published on: January 7, 2022

ACラインフィルタリング性能を持つグラフェン二重層電容器

John R Miller1, R A Outlaw, B C Holloway

  • 1JME, Inc., 17210 Parkland Drive, Shaker Heights, OH 44120, USA. jmecapacitor@att.net

Science (New York, N.Y.)
|October 9, 2010
PubMed
まとめ
この要約は機械生成です。

新しいグラフェン電極を備えた電気二層電容器 (DLC) は,波紋電流を効率的にフィルターします. この設計は,より速い応答時間と,より小さな電子機器の潜在能力を提供します.

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Development of a 3D Graphene Electrode Dielectrophoretic Device
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Development of a 3D Graphene Electrode Dielectrophoretic Device

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Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
07:51

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

Published on: January 7, 2022

Development of a 3D Graphene Electrode Dielectrophoretic Device
11:15

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科学分野:

  • マテリアルサイエンス 材料科学
  • 電気工学 電気工学とは
  • 電気化学 電気化学について

背景:

  • 電気の二重層電容器 (DLC) は,高い貯蔵容量を示しているが,その多孔な電極により,リップルフィルタリングアプリケーションのレジスタとして機能することが多い.
  • 従来のDLCは,パワーエレクトロニクスのACリップルの効率的なフィルタリングに苦労しています.

研究 の 目的:

  • 整直直直流のフィルタリング性能を改善したDLCを開発する.
  • 垂直指向のグラフェンナノシートの使用を調査し,コンデンサの性能を向上させる.

主な方法:

  • 垂直指向のグラフェンナノシートを使用したDLCの製造,金属電流集束器に直接成長した.
  • RC時間常数と120Hzのリップルフィルタリング効率を含む,コンデンサの性能の特徴.

主要な成果:

  • 新しいDLCを使用した効率的な120Hzの電流フィルタリングが実証されました.
  • 典型的なDLC (~1秒) と比較して,著しく減少したRC時間常数 (<200マイクロ秒) を達成しました.
  • グラフェンナノシート電極は,露出したエッジ平面による電荷貯蔵量の増加を示した.

結論:

  • 垂直方向のグラフェンナノシート電極は,DLCで効率的なリップルフィルタリングを可能にします.
  • 開発されたDLCは,従来のコンデンサに比べて優れた性能とミニチュライゼーションの可能性を提供します.