室温で動作する充電可能なカルシウム酸素電池
Lei Ye1, Meng Liao1, Kun Zhang1
1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Institute of Fiber Materials and Devices, and Laboratory of Advanced Materials, Fudan University, Shanghai, China.
Nature
|February 7, 2024
まとめ
研究者は,室温で動作する充電可能なカルシウム酸素 (Ca-O2) バッテリーを開発しました. この突破は新しい電解質とカトドを用いて 反応性過酸化カルシウム排出物で700サイクルを可能にします
科学分野:
- 電気化学
- 材料科学
背景:
- カルシウム-酸素 (Ca-O2) バッテリーは,O2を酸化カルシウム化合物 (CaOx) に還元することによって,理論的に高い容量を提供します.
- 課題は,惰性放電製品とCa金属アノドとO2との電解質の互換性であり,室温での充電を妨げています.
研究 の 目的:
- 室温で効率的に動作するリチャージ可能なCa-O2電池を開発する.
- Ca-O2システムにおける惰性放電産物と電解質の安定性の限界を克服する.
主な方法:
- 新しいイオン液体ベースの電解質を用いたCa-O2電池を設計した.
- 化学的に反応性のある過酸化カルシウム (CaO2) を放電製品として形成する2電子還酸化反応を可能にします.
- アノドでのCa プレッティング・ストリッピングを容易にし,カトドでのCaO2/O2リドックスを改善した.
主要な成果:
- 室温で700サイクルで充電可能なCa-O2電池を達成しました.
- 反応性CaO2排出物の形成が示された.
- バッテリーの空気中の安定性と 柔軟な繊維の応用の可能性を示した.
結論:
- 新しいCa-O2電池システムは,室温で動作する以前の制限を克服します.
- 反応性CaO2と安定した電解質の使用により,高いサイクル寿命が可能です.
- この技術はエアステーブルで柔軟な繊維製のバッテリーに適しています
さらに関連する動画
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
13.0K
10:41The Effect of Charging and Discharging Lithium Iron Phosphate-graphite Cells at Different Temperatures on Degradation
Published on: July 18, 2018
15.5K
関連する概念動画
03:12Batteries and Fuel Cells
27.4K
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...
27.4K
02:47Voltaic/Galvanic Cells
57.2K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
57.2K
01:21DC Battery
794
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,...
794
01:17Heat Capacity: Problem-Solving
517
The heat capacity of a gas is the amount of heat energy required to raise the temperature of a unit mass of gas by one degree Celsius. It is an important thermodynamic property of gases, and its determination is essential in many industrial and scientific applications. Here are the steps to solve problems related to the heat capacities of gases:
Determine the type of gas: The heat capacity of a gas depends on its molecular structure and the degree of freedom of its molecules. Different types of...
Determine the type of gas: The heat capacity of a gas depends on its molecular structure and the degree of freedom of its molecules. Different types of...
517
03:06Alkali Metals
19.3K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
19.3K
03:00Electrolysis
26.4K
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...
26.4K