Wang Sen, Jiang Yingjun, Hu Xianluo
School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.
Adv Mater. 2022 Dec;34(52):e2200945. doi: 10.1002/adma.202200945. Epub 2022 Aug 26.
Alkali (lithium, sodium)-based second batteries are considered one of the brightest candidates for energy-storage applications in order to utilize the random and intermittent renewable energy to achieve carbon neutrality. Conventional lithium/sodium batteries containing liquid organic electrolytes are vulnerable to electrolytes leakage and even combustion, which hinders their large-scale and reliable application. All-solid-state electrolytes which are considered to have better safety have been developed in recent years. However, most of them suffer from low ionic conductivity and large interfacial resistance with the electrode. Ionogel-electrolyte membranes composed of ionic liquids and solid matrices, have attracted much attention because of their nonvolatility, nonflammability, and superior chemical and electrochemical properties. This review focuses on the most recent advances of ionogel electrolytes that sprang up with the emerging demand and progress of safe lithium/sodium batteries. The ionogel-electrolyte membranes are discussed based on the framework components and preparation methods. Their structure and properties, including ionic conductivity, mechanical strength, electrochemical stabilities, and so on, are demonstrated in combination with their applications. The current challenges and insights on the future development of ionogel electrolytes for advanced safe lithium/sodium batteries are also proposed.
基于碱金属（锂、钠）的二次电池被认为是储能应用中最有前景的候选者之一，以便利用随机且间歇性的可再生能源来实现碳中和。传统的含液体有机电解质的锂/钠电池容易出现电解质泄漏甚至燃烧的情况，这阻碍了它们的大规模可靠应用。近年来已开发出被认为具有更好安全性的全固态电解质。然而，它们中的大多数存在离子电导率低以及与电极的界面电阻大的问题。由离子液体和固体基质组成的离子凝胶电解质膜，因其不挥发性、不可燃性以及优异的化学和电化学性能而备受关注。本综述聚焦于随着安全锂/钠电池的新需求和进展而涌现的离子凝胶电解质的最新进展。基于框架成分和制备方法对离子凝胶电解质膜进行了讨论。结合其应用展示了它们的结构和性能，包括离子电导率、机械强度、电化学稳定性等。还提出了当前离子凝胶电解质用于先进安全锂/钠电池未来发展面临的挑战和见解。
