相关实验视频
Updated: Jun 8, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
通过电化学密集的阴极接口反应层减少死亡物种,以实现高速耐久的ZnRacI-Br电池
Zhenfeng Feng1, Yongchao Tang1,2, Yue Wei3
1School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
Angewandte Chemie (International ed. in English)
|November 7, 2024
概括
一个新的正极接口层通过防止"死亡物种"的形成,改善了水性Zn 这使得电网储能系统的高性能和超长寿命成为可能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性Zn下载二氧化电池 (AZHBs) 为电网存储提供高能量密度,但由于"死亡物种"的形成,在高充/放电速率下耐用性较差.
- 在AZHBs中,特别是ZnRhI-Br系统中,间素反应是有希望的,但需要克服稳定性限制的策略.
研究的目的:
- 开发一种电化学密集的阴极接口反应层 (CIRL) 用于电池.
- 通过控制活跃物种转化和扩散,提高AZHBs的高耐久性和寿命.
主要方法:
- 在缩的Br-电解质中形成密集的,不含水的CIRL.
- 在高电流密度下,电化学循环和电池的特征.
- 用光谱分析来验证电化学机制和物种保护.
主要成果:
- CIRL显著改善了电荷转移动力学,并降低了素物种转换的激活能量.
- 该CIRL有效地保护活性物种,防止降解,并使超长周期寿命.
- 在20米Br-电解质中的ZnBodyI-Br电池与2米Br-电解质中的电池相比,表现出更高的速率能力和寿命,在10Ag-1时实现了超过25,000个周期,保持98.3%.
结论:
- 在AZHBs的高率中,CIRL对活跃物种的保护至关重要.
- 缩的电解质和CIRL形成是实现高速度耐久性的关键.
- 这种方法为开发其他用于电网级应用的高能介电池提供了途径.
相关概念视频
Batteries and Fuel Cells
27.0K
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...
27.0K
Electrolysis
26.0K
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...
26.0K
Voltaic/Galvanic Cells
56.8K
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,...
56.8K
Electrodeposition
605
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
605
Standard Electrode Potentials
43.5K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
43.5K

