安定した高エネルギー水性アルイオン電池の設計
Chunshuang Yan1,2, Chade Lv2, Liguang Wang3
1School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
Journal of the American Chemical Society
|August 14, 2020
まとめ
研究者らは新しい水性アルミニウムイオン電池 (AAIB) を開発し,新しいカトドと合金アノドを使用した. このシステムは高い放電電圧と容量を達成し,より安全で低コストの代替エネルギー貯蔵を提供します.
科学分野:
- 電気化学
- 材料科学
- エネルギー貯蔵
背景:
- 水性アルミニウムイオン電池 (AAIB) は安全性と高い理論容量を提供します.
- 課題には,アノドの被動化,水素側反応,およびキャソードオプションの制限があり,性能が低下します.
- アルミニウムの豊富さにより,AAIBはグリッドスケールのアプリケーションに魅力的です.
研究 の 目的:
- 高性能で安定したAAIBシステムを開発する.
- 低電圧と低サイクルなどの既存のAAIBの限界を克服する.
主な方法:
- 立体電気化学的活性化により AlMnO2 カソードを合成した
- 亜鉛基板を支えるZn-Al合金アノドを,Al3+$の堆積によって開発した.
- 液体の電解質を使用した.
主要な成果:
- 高容量の2電子反応が組み込まれました.
- Zn-Al合金のアノードは,受動化とデンドライトの増殖を効果的に抑制しました.
- AAIBシステムは,80サイクルで1.6Vと460mAhの電圧の記録を達成しました.
結論:
- 提案されたAAIBシステムは,性能と安定性の有意な改善を示しています.
- この進歩は,実用的で高性能で低コストなAAIBを開発するための有望な経路を提供します.
- この研究は,アルミニウムベースのエネルギー貯蔵ソリューションに新しい道を開きます.
関連する概念動画
Batteries and Fuel Cells
30.3K
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...
30.3K
Ions as Acids and Bases
25.8K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
25.8K
Complexation Equilibria: Factors Influencing Stability of Complexes
695
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
695
Ionic Bonding and Electron Transfer
48.1K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
48.1K
Ion Exchange
983
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
983
Electrolysis
29.7K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
29.7K


