Design of Dual-conducting Interface in Composite Cathode by Semi-Cyclized Polyacrylonitrile Soft Coating for Practical Solid-State Lithium-Metal Batteries
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引用次数: 0
Abstract
Solid-solid interfaces in the composite nickel-rich layered oxide LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode for solid-state lithium-metal batteries face the thorny issues of macroscopic contact interface, significant side reaction, intergranular cracking and sluggish Li+/e- transfer. To avoid such problems, we designed a high ionic/electronic dual-conducting soft gel coating on NCM811 cathode particles through the high-temperature semi-cyclized polyacrylonitrile strategy, aiming to build an unobstructed channel for enhanced transport kinetics in solid composite cathode. Additionally, an inner electrochemically stable interface layer is constructed between the coating layer and cathode particles vialing in situ electrochemical conversion. Thus, the coating layers with specific properties can maintain structural integrity of NCM811 cathode via buffering the internal stress during lithiation/delithiation and endows the solid-state battery with low interfacial resistance, outstanding cycling stability and thermal safety stability. Notably, this facile and scalable surface engineering provides a novel solution for the application of high nickel cathode materials in solid-state batteries.
期刊介绍:
Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field.
Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy.
Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.