带有聚合物电解质的无膜氧化还原流电池
Rajeev K Gautam1, Xiao Wang1, Jianbing Jimmy Jiang2
1Department of Chemistry, University of Cincinnati, Cincinnati, Ohio, 45221, USA.
Nature communications
|October 3, 2025
概括
这项研究引入了一种新的无膜电池,使用聚合物电解质来克服电池的挑战. 凝聚合物电解质表现出卓越的性能,提高了先进电池应用的能量密度和安全性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 金属电池具有高能量密度,但受到Li的不稳定性,挥发性电解质和昂贵的膜的影响.
- 开发稳定高效的电解质对于推进电池技术至关重要.
- 目前的基于膜的系统具有显著的成本和性能限制.
研究的目的:
- 开发一种使用离子固定聚合物电解质的无膜电池系统.
- 为了比较固态和凝聚合物电解质作为解质的性能.
- 为了提高金属电池的安全性和能量密度.
主要方法:
- 制造两种聚合物电解质:固体聚合物电解质 (SPE) 和凝聚合物电解质 (GPE).
- 这些电解质作为解质与基于有机溶剂的阴解质的整合.
- 在静态和流量条件下测试无膜电池的性能.
主要成果:
- 与固体聚合物电解质 (SPE) 相比,凝聚合物电解质 (GPE) 显示出更好的Li+扩散,质量传输和能量密度.
- 带有SPE的电池显示容量保留率为90.7% (静态) 和81.78% (流量),库伦比效率高.
- 使用GPE的电池实现了96.8% (静态) 和78.8% (流量) 的更高容量保留率和更高的库伦比效率.
结论:
- 聚合物电解质策略有效地提高了电池性能和安全性.
- 凝聚合物电解质对下一代金属电池具有显著的前景.
- 消除离子交换膜为更具成本效益和效率的电池设计提供了途径.
相关概念视频
Batteries and Fuel Cells
30.6K
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...
30.6K
Voltaic/Galvanic Cells
62.8K
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,...
62.8K
Electrolysis
30.0K
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...
30.0K
Redox Reactions
58.1K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
58.1K
Redox Reactions
826
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
826
Potentiometry: Membrane Electrodes
1.5K
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...
1.5K


