Ionically conducting inorganic binders: a paradigm shift in electrochemical energy storage
Ionically conducting inorganic binders: a paradigm shift in electrochemical energy storage
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离子导电无机粘合剂：电化学储能的范式转变
DOI：
10.1039/d2gc01389d
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发表时间：
2022
期刊：
影响因子：
9.8
通讯作者：
Trivedi S
中科院分区：
文献类型：
--
作者：
Trivedi S
在电池的关键成分中，粘合剂发挥着至关重要的作用，它可以将活性材料和导电添加剂互连起来，并促进电极材料在所需基材上的涂覆，从而实现电池的灵活制造。此外，它们有助于缓冲电极材料中出现的体积变化并增强其循环稳定性。目前，聚偏二氟乙烯基粘合剂被广泛使用，尽管其成本高、不环保且能源效率低。已经研究了几种可水加工的粘合剂作为替代品，但它们存在各种固有问题。在这里，我们揭示了几种离子导电无机粘合剂（ICIB）的潜力。这些 ICIB 不仅具有离子导电性，而且可进行水处理、化学相容、环保、低成本、热稳定 (>1000 °C)、无排放，而且重要的是使用安全。这些无机粘合剂在几个方面优于标准的聚偏二氟乙烯基粘合剂。令人惊讶的是，ICIB 能够吸收充电正极材料在高温下放出的热量，这将显着提高电池的安全性。独特的固有离子导电特性与结合能力相结合，使固态电池能够灵活加工和发挥作用，否则由于固体电解质带来的机械刚性、化学不相容性和界面问题而面临挑战。这里介绍的无机粘合剂将使电池制造和回收更加节能、环保、灵活、安全，最重要的是具有成本效益。
Among the key components in batteries, binders play a vital role by interconnecting active materials and conductive additives and facilitating the coating of electrode materials on the desired substrates thus enabling the flexible fabrication of batteries. Further, they aid in buffering volume changes that arise in electrode materials and enhance their cycling stability. Presently, polyvinylidene fluoride-based binders are employed widely, despite their high cost, non-eco-friendliness, and energy inefficiency. Several water processable binders have been investigated as alternatives, but they suffer from various intrinsic issues. Here, we reveal the potential of several ionically conducting inorganic binders (ICIBs). These ICIBs are not only ionically conducting, but also water processable, chemically compatible, eco-friendly, low-cost, thermally stable (>1000 °C), emission-free, and importantly, safe to use. These inorganic binders outperformed standard polyvinylidene fluoride-based binders in several aspects. Surprisingly, ICIBs are absorbing the exothermic heat evolved by charged cathode materials at high temperatures, which will significantly enhance the safety of the batteries. The unique intrinsic ionic conductive properties combined with binding abilities enabled the flexible processing and functioning of solid-state batteries, otherwise challenging due to the mechanical rigidity, chemical incompatibility, and interfacial issues posed by solid electrolytes. The inorganic binders introduced here will make battery manufacturing and recycling more energy-efficient, eco-friendly, flexible, safe, and above all, cost-effective.