在空气电池上直接转换太阳能
Xinlong Fu1,2, Feng He1, Xin Liu3
1Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
概括
这项研究介绍了一种可转换的太阳能空气电池 (SZAB),使用一种新的替代石墨烯电极. 这种设计可以直接转换和储存太阳能,实现高能效和功率转换效率.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 可再生能源可再生能源是可再生能源.
背景情况:
- 传统的储能系统需要单独的太阳能电池来充电.
- 开发用于直接太阳能转换和储存的集成设备对于未来的能源解决方案至关重要.
研究的目的:
- 展示一种新型的太阳能可转换空气电池 (SZAB),可以直接转换和存储太阳能.
- 使用多功能电极进行增强光响应电催化.
主要方法:
- 使用替代石墨 (N-GDY) 制造多功能电极.
- 电极的光响应双功能电催化性能的表征.
- 在照明下评估SZAB的性能,包括充电电压,能源效率和功率转换效率.
- 密度函数理论 (DFT) 计算以阐明反应机制.
主要成果:
- 该N-GDY电极作为一个光响应的双功能电催化剂,使得阳光促进充电.
- SZAB在照明下显示了降低的充电电压,实现了90.4%的能源效率和30.3%的电能节约.
- 实现了1.02%的功率转换效率.
- DFT的计算显示,光刺激通过改变电子结构并促进中间体的形成,促进了氧气演化反应动力学.
结论:
- 开发的SZAB提供了一种直接的途径,可以使用太阳能充电电池,而无需外部太阳能电池.
- 这项工作为集成太阳能转换和储存设备提供了概念和实验验证.
- 这些发现为制造具有提高效率和简化设计的未来能源设备铺平了道路.
相关概念视频
01:11P-N junction
525
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
525
01:34The Z-Scheme of Electron Transport in Photosynthesis
10.1K
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
10.1K
02:49Calculating Standard Free Energy Changes
21.2K
The free energy change for a reaction that occurs under the standard conditions of 1 bar pressure and at 298 K is called the standard free energy change. Since free energy is a state function, its value depends only on the conditions of the initial and final states of the system. A convenient and common approach to the calculation of free energy changes for physical and chemical reactions is by use of widely available compilations of standard state thermodynamic data. One method involves the...
21.2K
03:12Batteries and Fuel Cells
27.3K
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...
27.3K
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