通过在硫电池中的合金兴奋剂抑制矿FeS2的表面氧化
Xinliang Men1, Teng Deng1, Liping Chen1
1School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710311, China.
Small (Weinheim an der Bergstrasse, Germany)
|August 26, 2024
概括
隔离器上的添加铁二硫化物通过改善动力学和防止催化剂失活来增强硫电池. 这增加了电池的寿命和用于先进的储能应用的容量.
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:
- 硫 (Li-S) 电池具有较高的理论容量,但由于硫运动缓慢和聚硫化物穿而面临挑战.
- 这些问题限制了Li-S电池的实际应用和循环寿命.
研究的目的:
- 开发一种用于Li-S电池的新型电催化剂,以克服动力限制和聚硫化物穿.
- 通过隔离器修改来提高Li-S电池的稳定性和性能.
主要方法:
- 合成了10%的酸配合的铁二硫化 (Co-FeS2) 电催化剂.
- 在乙黑上沉积的Co-FeS2作为Li-S电池的分离涂层.
- 评估电催化活性,包括电子电阻,离子扩散和转化动力学.
主要成果:
- 同FeS2显著改善了Li2S6中间体的吸附和抑制了FeS2表面氧化.
- 硬币电池表现出超长的循环寿命 (920 个循环在 1C) 与高初始容量 (854.7 mAh g-1).
- 使用Co-FeS2涂层分离器的层状囊细胞在50个循环后在0.1C下维持了590 mAh g-1.
结论:
- 联合兴奋剂通过防止表面氧化和停用来增强FeS2的电催化活性.
- 涂Co-FeS2的分离器为低成本,高性能Li-S电池提供了一个有前途的战略.
- 这种方法为设计袋式电池中先进的分离器涂层提供了可行的参考.
相关概念视频
Formation of Complex Ions
23.5K
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...
23.5K
Precipitation and Co-precipitation
1.7K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.7K
Batteries and Fuel Cells
27.2K
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...
27.2K
Electrodeposition
616
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...
616


