对于超长寿命可充电水性离子电池的COFs阴极和优化电解质的兼容性
Yifan Wei1,2, Zhonglin Li2, Yongyao Liu2
1Department of Chemistry, College of Chemistry, Fuzhou University, Fuzhou, 350108, China.
ChemSusChem
|March 4, 2024
概括
研究人员开发了一种持久的可充电水性离子电池 (RAZIB),使用一种新的基于 antraquinone 的共价有机框架 (COF) 阴极. 这一战略提高了可持续能源储存的性能和寿命.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 可充电的水性离子电池 (RAZIB) 提供安全,负担得起和环保的能源存储.
- 关键的局限性包括需要高容量阴极和稳定的电解质.
- 开发先进的材料对于释放RAZIB潜力至关重要.
研究的目的:
- 提出一个兼容性战略,以创建持久和长期的RAZIB.
- 开发和使用共价有机框架 (COF) 阴极,以提高电池性能.
- 研究一种用于增强RAZIB操作的新型电解质配方.
主要方法:
- 合成了一种基于 antraquinone 的共价有机框架 (DAAQ-COF),用于作为阴极材料.
- 采用金属作为阳极和水性盐溶液与三酸作为电解质.
- 进行电化学测试以评估容量,效率和可循环使用性.
主要成果:
- DAAQ-COF阴极展示了快速充电能力和高库伦比克效率 (近100%).
- 在1 A g−1.1.1时完成了10,000个循环后,实现了长期的特殊循环性,保持率为100%.
- 在COF阴极中发现了Zn2+和H+的新型联合插入机制.
结论:
- 开发的COF阴极和三基电解质策略显著提高了RAZIB的性能和耐用性.
- 鉴定到的共同插入机制为有机阴极的电化学行为提供了新的见解.
- 这项工作为RAZIB中高性能,可持续的有机阴极材料铺平了道路.
相关概念视频
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
03:02Standard Electrode Potentials
43.8K
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...
43.8K
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
02:41Concentration Cells
22.6K
A concentration cell is a type of a voltaic cell constructed by connecting two almost identical half-cells, both based on the same half-reaction and using the same electrode, differing only in the concentration of one redox species. A concentration cell's potential, therefore, is determined only by the concentration difference of the particular redox species.
Consider the following voltaic cell:
Consider the following voltaic cell:
22.6K
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