相关实验视频
Updated: Jun 5, 2025
09:04
Fabrication of VB2/Air Cells for Electrochemical Testing
Published on: August 5, 2013
11.9K
释放基于的化合物用于高能水性离子电池
Saad Zafar1,2, Bimlesh Lochab1
1Materials Chemistry Laboratory, Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence, Gautam Buddha Nagar, Uttar Pradesh 201314, India.
ACS omega
|December 16, 2024
概括
预先将客体物种插入基于的阴极中,可以提高水性离子电池 (ZIB) 的结构稳定性和离子传输. 这一战略提高了产能和循环性能,为商业化铺平了道路.
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 (ZIB) 为大规模储能提供了安全,负担得起和环保的替代方案.
- 基于的化合物是ZIB的有希望的阴极材料,因为它们的结构多功能性和高理论容量.
- 瓦纳溶解和容量降解等挑战限制了当前基于瓦纳的阴极的实际应用.
研究的目的:
- 审查基于的阴极材料的最新进展,用于水性ZIB,使用预插入的客物种.
- 检查客物种对晶体结构,Zn2+离子储存机制和电化学性能的影响.
- 确定挑战,并为这些先进的ZIBs的商业化提出未来方向.
主要方法:
- 文献综述侧重于将预插入的客物种纳入水性ZIBs的基阴极的研究.
- 分析晶体结构的变化及其与电化学性质的相关性.
- 调查电荷传输机制和客物种在提高电池性能方面的作用.
主要成果:
- 客物种的预插曲显著提高了基于的阴极的结构稳定性,减轻了的溶解.
- 寄宿物种促进了更快的Zn2+离子扩散,并改善了电荷转移动力学,从而提高了容量和更好的速率能力.
- 经过修改的晶体结构使得Zn2+的间隙/脱间隙更有效,从而提高了循环稳定性.
结论:
- 基于的阴极与预插入的客物种代表了水性ZIB技术的重大进步.
- 这种方法有效地解决了关键的局限性,为高性能和持久的ZIB提供了可行的途径.
- 进一步的研究和开发对于优化材料设计和实现这些电池的商业潜力至关重要.
相关概念视频
03:12Batteries 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
03:02Standard Electrode Potentials
43.4K
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...
43.4K
02:47Voltaic/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
03:45Formation of Complex Ions
23.2K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.2K
01:26EDTA: Auxiliary Complexing Reagents
542
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
542
02:41Concentration Cells
22.3K
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:
22.3K