二元原子位点使有限的双向并联电催化硫转换为低温全固态Na-S电池成为可能
Weiwei Zhang1,2, Mingli Wang1,3, Hong Zhang4
1Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, Anhui, 230601, China.
Angewandte Chemie (International ed. in English)
|December 20, 2023
概括
这项研究引入了一种新型的低温全固态硫电池. 它通过使用双功能催化剂来控制硫化学和改善离子传输来实现高性能.
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:
- 目前的全固态硫 (Na-S) 电池面临着高工作温度和低硫利用的挑战.
- 缓慢的多硫化物氧化还原动力学和不受控制的硫特异性限制了Na-S电池化学的理论潜力.
研究的目的:
- 开发一种具有增强性能的低温全固态Na-S电池.
- 通过一种新的催化方法来解决硫利用和多硫化物动力学的局限性.
主要方法:
- 使用牺牲模板工艺制造具有原子分散的MnN4和CoN4热点的双功能空心硫矩阵.
- 使用Na3Zr2Si2PO12陶膜作为一个限制双向并联电催化平台.
- 在电池循环过程中对聚硫化物电化学的催化作用的研究.
主要成果:
- 双功能催化剂有效调整了聚硫化物电化学,使低温 (80°C) 操作成为可能.
- CoN4位点催化了多硫化物减少,而MnN4位点加速了Na2S4到Na2S的转化,确保了均的Na2S沉积.
- 催化剂的协同效应减轻了阴极被动化,并在充电时改善了Na2S分解.
结论:
- 开发的全固态Na-S电池表现出稳定的循环,可逆容量为1060mAhg-1,高库伦比效率 (98.5%) 和高能量密度 (1008Whkgcathode-1).
- 这种方法为高性能,低温固态硫电池提供了一个有希望的途径,与液态电解质系统相似.
更多相关视频
07:55Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
Published on: April 17, 2018
12.7K
09:49A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
Published on: February 13, 2017
10.5K
相关概念视频
03:12Batteries and Fuel Cells
27.4K
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...
27.4K
02:47Voltaic/Galvanic Cells
57.3K
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,...
57.3K