Masashi Okubo1
Waseda University1
Layered transition-metal carbides/nitrides (MXenes) are an emerging family of electrochemical energy storage materials. When used as an electrode material with a liquid electrolyte, MXenes exhibit Li+ intercalation without large structural changes, which enables fast ion transport as well as dense charge storage in the open interlayer space between MXene nanosheets. It is well known that the Li+ intercalation of MXene electrodes is significantly affected by liquid electrolytes. However, the charge storage using MXene electrodes in inorganic solid electrolytes has rarely been investigated. Especially, the strain-free property of MXene should be beneficial to maintaining solid-solid interface, which enabling long-term cycling of all-solid-state batteries.<br/><br/>In this work, we investigate the charge storage behavior of various MXene electrodes with solid electrolytes. After clarifying the strain-free charge storage mechanism through the MXene–solid electrolyte interface, we exploit it for the stable operation of a strain-free ASSB using MXene as a negative electrode material.