我国科研人员提出固态锂电池界面调控新方案

Core Insights - The research team at the Institute of Metal Research, Chinese Academy of Sciences, has made significant advancements in solid-state lithium battery technology, addressing critical issues such as high interfacial impedance and low ionic conductivity [1] - Solid-state lithium batteries are recognized as a key development direction for next-generation energy storage technologies due to their high safety and energy density [1] Research Breakthrough - The traditional solid-state batteries face challenges due to poor solid-solid interfacial contact between electrodes and electrolytes, leading to high ionic transport resistance and low efficiency [1] - The research team designed a new material by incorporating ethoxy groups with ionic conductivity and short sulfur chains with electrochemical activity into the polymer backbone, achieving interfacial integration at the molecular level [1] Performance Improvements - The newly developed material exhibits high ionic transport capabilities and allows for controllable switching of ionic transport and storage behaviors across different potential ranges [1] - A flexible battery constructed with this material demonstrated excellent bend resistance, enduring up to 20,000 cycles of repeated bending [1] - When used as a polymer electrolyte in composite cathodes, the energy density of the composite cathode increased by 86% [1]