双阴离子协调操纵诱导和丰富的梯度间相向稳定和安全的金属电池
Yi-Hu Feng1, Mengting Liu1, Wenli Qi2
1Center of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China.
高压金属电池 (SMB) 实现了更好的稳定性和安全性. 一个新的电解质和阴极间相可以防止容量衰减和寄生反应,从而实现长期循环.
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:
- 高压金属电池 (SMB) 由于大量的资源,提供高能量密度和成本效益.
- 挑战包括电解质分解,不稳定的阴极/电解质间相 (CEI),以及反应性金属和易燃电解质的安全问题.
研究的目的:
- 为高压中小企业设计一个稳定安全的电解质系统.
- 为了研究保护CEI层的形成,以提高电池性能.
主要方法:
- 开发一种非易燃的基于三甲基酸盐的局部高度电解质,具有双阴离子聚合Na+溶解结构.
- 在阴极上形成和化合物丰富的梯度CEI.
- 对Na0.95Ni0.4Fe0.15Mn0.3Ti0.15O2//Na电池进行电化学测试.
主要成果:
- 新型电解质和梯度CEI有效抑制了寄生反应,并改善了界面稳定性.
- 由于协同的多组件效应,通过接口观察到增强的Na+运输.
- 电池表现出167.5mAhg-1的放电容量,在1C的800个循环后保持85.2%的容量.
结论:
- 设计的电解质和CEI战略显著提高了高压中小企业的循环稳定性和安全性.
- 这种方法为开发用于实际中小企业应用的阻燃电解质提供了总体策略.
更多相关视频
10:03Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
相关概念视频
Valence Bond Theory
Ionic Bonding and Electron Transfer
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Ionic Bonds
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
Ionic Strength: Effects on Chemical Equilibria
In this solution, the primary...
