Chen Sun , Yang Li , Zheng Sun , Xuanyi Yuan , Haibo Jin , Yongjie Zhao
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引用次数: 0
Abstract
Anode-free solid-state batteries (AFSSBs) are considered one of the promising solutions for achieving high energy density and safety of electrochemical energy storage systems. However, owing to mechanochemical contact losses and metallic dendrite growth caused by the degradation at the current collector (CC)/electrolyte interface, the feasibility of AFSSBs is critically limited, especially upon the involvement of rigid ceramic electrolytes. Here, a new strategy is reported for NASICON-structure Na3Zr2Si2PO12 (NZSP) electrolyte-based AFSSBs by introducing a resilient ferroelectric composite substrate coated onto Al CC, eventually achieving efficient and stable operation. Compared with the bare Al foil, the ferroelectric composite substrate not only renders an intimate CC/electrolyte interface compatibility, but also dynamically regulates the distribution and migration of Na+ flux at the CC/electrolyte interface through the built-in electric field stem from ferroelectric BaTiO3, guiding homogeneous and dense sodium metal deposition. Stable plating/stripping cycling can be achieved even at a high current density of 1.2mA cm−2 with the Coulombic efficiency of (99.7 %). Significantly, the NZSP-based AFSSB integrated with the ferroelectric composite substrate and mainstream sodium ion cathodes demonstrates stable cycling and excellent capacity retention.
期刊介绍:
Materials Today is the leading journal in the Materials Today family, focusing on the latest and most impactful work in the materials science community. With a reputation for excellence in news and reviews, the journal has now expanded its coverage to include original research and aims to be at the forefront of the field.
We welcome comprehensive articles, short communications, and review articles from established leaders in the rapidly evolving fields of materials science and related disciplines. We strive to provide authors with rigorous peer review, fast publication, and maximum exposure for their work. While we only accept the most significant manuscripts, our speedy evaluation process ensures that there are no unnecessary publication delays.