超分子熱電化学細胞:ホスト-ゲスト複合と塩誘発結晶による熱電性能の強化
Hongyao Zhou, Teppei Yamada1, Nobuo Kimizuka
1Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency , 7 Gobancho, Chiyodaku, Tokyo 102-0076, Japan.
Journal of the American Chemical Society
|August 11, 2016
まとめ
熱電化学電池は,熱電圧の強化を約束しています. ホスト・ゲスト化学を用いた新しい超分子アプローチにより,熱電気エネルギー変換の改善のために2.0mV K ((-1) のシーベック係数が記録されました.
科学分野:
- 材料科学
- 電気化学
- 超分子化学
背景:
- 熱電化学電池は,半導体材料よりも高い熱電圧ポテンシャルを提供します.
- 現在の熱電気エネルギー変換方法は,その潜在能力を制限する課題に直面しています.
- 先進的な熱電気化学電池の開発は,効率的なエネルギー収集に不可欠です.
研究 の 目的:
- 熱電化学細胞の性能を高めるための合理的な超分子方法論を開発する.
- 周囲の温度に対して高いシーベック係数を達成する.
- 熱電気エネルギー変換における宿主-ゲスト化学の応用を探求する.
主な方法:
- トリオイドイオンをα-サイクロデクストリン内に封じ込める超分子アプローチを用いた.
- レドックスイオン濃度グラデーションを生成するために,温度に依存する宿主-ゲストの相互作用を活用した.
- ホスト・ゲスト・システムに基づく熱電気化学細胞の性能を調査した.
主要な成果:
- 周囲の温度で約2. 0mV K ((-1) の最高シーベック係数を達成した.
- 濃度グラデーションの生成に不可欠な温度依存の宿主-ゲストの均衡を証明した.
- 開発したシステムの高いメリット数 (zT) 5 × 10−3) を得ました.
結論:
- ホスト・ゲスト化学の導入は,熱電気エネルギー変換の新しく効果的な戦略を提供します.
- 開発された超分子方法論は,熱電化学細胞の性能を大幅に向上させます.
- この研究は熱電材料と装置の進歩に 新たな道を開きます
さらに関連する動画
09:23Author Spotlight: Advancing Energy Solutions Using Nanocomposites as Processed Thermoelectric Materials
Published on: May 17, 2024
2.2K
04:09Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
Published on: August 30, 2024
848
関連する概念動画
01:10Recrystallization: Solid–Solution Equilibria
4.4K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
4.4K
01:19Complexation Equilibria: The Chelate Effect
1.5K
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
1.5K
01:28Electrochemical Cells
66
Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not...
66
02:58Crystal Field Theory - Octahedral Complexes
31.5K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
31.5K
02:42Aqueous Solutions and Heats of Hydration
18.6K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
18.6K
01:09Colloidal precipitates
6.7K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
6.7K