School of Materials Science and Engineering, Xihua University, 999 Jinzhou Road, Chengdu 610039, China.
Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China.
Molecules. 2023 Jan 13;28(2):823. doi: 10.3390/molecules28020823.
High-voltage potassium-based batteries are promising alternatives for lithium-ion batteries as next-generation energy storage devices. The stability and reversibility of such systems depend largely on the properties of the corresponding electrolytes. This review first presents major challenges for high-voltage electrolytes, such as electrolyte decomposition, parasitic side reactions, and current collector corrosion. Then, the state-of-the-art modification strategies for traditional ester and ether-based organic electrolytes are scrutinized and discussed, including high concentration, localized high concentration/weakly solvating strategy, multi-ion strategy, and addition of high-voltage additives. Besides, research advances of other promising electrolyte systems, such as potassium-based ionic liquids and solid-state-electrolytes are also summarized. Finally, prospective future research directions are proposed to further enhance the oxidative stability and non-corrosiveness of electrolytes for high-voltage potassium batteries.
高压钾基电池作为下一代储能设备，是锂离子电池的有前途的替代品。此类系统的稳定性和可逆性在很大程度上取决于相应电解质的特性。本综述首先介绍了高压电解质的主要挑战，例如电解质分解、寄生副反应和集流器腐蚀。然后，仔细审查和讨论了传统酯和醚基有机电解质的最新改性策略，包括高浓度、局部高浓度/弱溶剂化策略、多离子策略和高压添加剂的添加。此外，还总结了其他有前途的电解质体系的研究进展，例如钾基离子液体和固态电解质。最后，提出了有前景的未来研究方向，以进一步提高高压钾电池电解质的氧化稳定性和非腐蚀性。
