相关实验视频
Updated: Oct 12, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.5K
由局部高度电解质启用的稳定无树脂电池
Jiarui He1, Amruth Bhargav1, Woochul Shin1
1Materials Science and Engineering Program & Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States.
Journal of the American Chemical Society
|November 24, 2021
概括
环境温度硫电池是离子电池的可持续替代品. 修改电解质溶解会产生一种保护性间相,使得稳定的循环和无树脂为实用的可行性.
科学领域:
- 电化学
- 材料科学
- 可持续能源
背景情况:
- -硫 (Na-S) 电池是离子电池的低成本,可持续的储能替代品.
- 主要挑战包括聚硫化物 (NaPS) 的运输,电解质副作用和树脂的形成,这阻碍了实际应用.
- 开发强大的固体电解质介面 (SEI) 对于稳定的Na-S电池性能至关重要.
研究的目的:
- 研究电解质溶解结构对Na-S电池中的SEI形成的影响.
- 抑制NaPS转移和树突生长,以提高电池循环的稳定性.
- 通过工程SEI证明Na-S电池的实际可行性.
主要方法:
- 调整离子液体电解质的溶解结构,以在两个电极上形成含有无机元素的SEI.
- 使用修改过的电解质研究Na-S细胞的电化学行为.
- 进行长期循环测试并分析SEI的组成和形态.
主要成果:
- 在阳极和硫阴极形成稳定,富含无机物质的SEI.
- 抑制NaPS转运和将硫氧化还原转化为准固态反应.
- 达到高初始容量 (922 mA h g-1) 和卓越的循环稳定性 (在300个循环中每循环衰减10%的容量).
- 证明没有树的金属和剥离.
结论:
- 电解质工程是为高性能Na-S电池创建保护性SEI的一个有效策略.
- 开发的方法显著减轻了关键的降解机制,使其能够稳定有效地运行.
- 这项技术的可扩展性突显了该技术的商业应用潜力.
相关概念视频
Batteries and Fuel Cells
28.5K
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...
28.5K
Voltaic/Galvanic Cells
59.0K
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,...
59.0K
Formation of Complex Ions
24.3K
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...
24.3K
Concentration Cells
23.5K
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:
23.5K
Preparation and Reactions of Sulfides
5.2K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
5.2K
Electrolysis
27.9K
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...
27.9K

