具有可充电离子电池的独特溶解结构的稳定于空气的二进制水合欧特基电解质
Pengyu Meng1, Jian Huang2, Zhaohui Yang1
1School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
Nano-micro letters
|July 29, 2023
概括
研究人员开发了一种新的,负担得起的,稳定的离子电池 (AIB) 的电解质. 这一突破使得更安全,高性能的能量存储成为可能,克服了当前昂贵和腐蚀性电解质的局限性.
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:
- 离子电池 (AIBs) 由于的丰富性,低成本和安全性,为大规模储能提供了离子电池的有希望的替代品.
- 目前AIB的发展受到昂贵,腐蚀性和湿度敏感的AlCl3基离子液体电解质的阻碍.
研究的目的:
- 为AIBs开发一种低成本,非腐蚀性和空气稳定的水合性欧性电解质.
- 为了优化电解质的溶解结构,以实现稳定和可逆的沉积和剥离.
- 为了证明使用新型电解质和氧化瓦纳纳米阴极的AIBs的性能.
主要方法:
- 通过使用甲非水合物和甲基尿素 (MU) 合成了水合的性电解质.
- 组件的比被优化,以达到特定的溶解结构 (平均协调数为2.4).
- 在现场同步射线辐射X射线衍射被用来研究Al3+插入/提取机制.
主要成果:
- 优化的甲非水合物/MU水合深度性电解质 (AMHEE) 促进了稳定和可逆的沉积/脱落.
- 使用AMHEE和氧化瓦纳纳米电极的AIB实现了320mAhg-1的高放电容量,容量保持良好.
- 在AMHEE表现出较低的溶解能量,使得高效的Al3+离子运输.
结论:
- 开发的AMHEE为可持续的AIB提供了低成本,安全和环保的电解质解决方案.
- 这项工作为实用和高性能离子电池应用铺平了道路.
- 优化的溶解结构是实现AIBs高效电化学性能的关键.
相关概念视频
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Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
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Overview
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...
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