现场观察高度水性电解质中的插入材料中演变的H2和固体电解质间相发展
Zachary T Gossage1, Nanako Ito1, Tomooki Hosaka1
1Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo, 162-8601, Japan.
Angewandte Chemie (International ed. in English)
|August 18, 2023
概括
缩水性电池中的固体电解质间相 (SEI) 形成了类似离子电池的保护层. 然而,进化发生在极端潜力时,这表明这些先进电池系统的局限性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 电池技术 电池技术
背景情况:
- 固体电解质间相 (SEI) 对于稳定的离子电池 (LIB) 来说至关重要,防止电解质分解.
- 了解水性电池的高度缩的盐水电解质 (WISE) 中的SEI是必不可少的,但仍然在很大程度上是未知的.
- 水性电池提供了比LIB更安全的替代品,但需要强大的界面稳定性.
研究的目的:
- 研究SEI在高度缩的WISE中的特性和形成.
- 用先进的现场技术来描述SEI结构和行为.
- 将WISE中的SEI形成与传统LIB中的SEI形成进行比较.
主要方法:
- 使用高级扫描电化学显微镜 (SECM) 进行高分辨率表面分析.
- 使用电化学质谱仪 (OEMS) 在现场检测气体演变.
- 研究了一个模型系统:55mol/kgK ((FSA) 0.6 (OTf) 0.4 电解质和一个3,4,9,10-烯四碳酸二胺 (PTCDI) 负电极.
主要成果:
- 观察到被动化的SEI结构具有缓慢的电子传输速率,类似于LIBs.
- 在 -1.3 V 左右的电位下,已经证明了稳定的SEI形成,与Ag/AgCl.相比.
- 在更极端的电位 (< -1.4 V vs. Ag/AgCl) 确定了不连续的SEI和进化,与稀释电解质的转变.
结论:
- 高度缩的WISE可以形成被动化的SEI层,从而有助于界面稳定性.
- 在极端潜力的进化突出了高压水性电池的局限性.
- 结合传统电池测试与现场SECM和OEMS是有效的特征未知的SEI结构.
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
25.5K
09:36In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
Published on: September 12, 2018
8.8K
相关概念视频
Electrolysis
26.6K
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...
26.6K
Potentiometry: Types of Electrodes
739
Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
739
Potentiometry: Membrane Electrodes
630
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
630
Controlled-Potential Coulometry: Electrolytic Methods
209
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
The chosen potential...
209
Qualitative Analysis
22.4K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
For instance, group IV...
22.4K
