Na-K Interlayer Driven Na-NASICON Solid-State Batteries

Yang Li

doi:10.1002/adfm.202425995

2025-02-10

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DOI：10.1002/adfm.202425995

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摘要

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固态钠电池被认为是中长期能量固定储能的高潜力候选者。然而，具有理想离子电导率和与固体金属电极高度稳定的固态电解质仍然是固态钠金属电池研发中的一个重大挑战。本研究提出了原位形成Na-K中间层的策略，其中K+从K掺杂的NASICON结构陶瓷电解质中电化学迁移至陶瓷电解质与钠金属电极的界面处，与钠金属局部动态形成Na-K中间层。因此，陶瓷电解质与钠电极的相容性显著增强。相应地，固/固界面接触的面积比电阻降低至29.9 Ω cm²，并实现了1.3 mA cm⁻²的高室温临界电流密度。与此同时，Na/Na₃Zr₂Si₂PO₁₂-0.005K/Na体系可在0.2 mA cm⁻²下稳定运行1400小时。此外，构建了基于NASICON结构陶瓷电解质的固态钠金属电池，并搭配聚阴离子和层状钠离子正极，以突出这种精心设计的陶瓷电解质/金属电极界面的优越性。

Keyword:

in-situ

Na-K interlayer

NASICON-structure ceramic electrolyte

sodium metal batteries

期刊

Advanced Functional Materials

IF:

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3.5W

被引数:

32.1W

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China Inst Atom Energy

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232

论文数: 91

被引数: 16

Beijing Inst Technol

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4.3K

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被引数: 688

Renmin Univ China

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637

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被引数: 126

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