A Na-rich fluorinated sulfate anti-perovskite with dual doping as solid electrolyte for Na metal solid state batteries

doi:10.1016/j.ensm.2020.05.030

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	A Na-rich fluorinated sulfate anti-perovskite with dual doping as solid electrolyte for Na metal solid state batteries
	Fan, SS; Lei, M; Wu, H; Hu, JL; Yin, CL; Liang, TX; Li, CL
	2020-10-01
Source Publication	ENERGY STORAGE MATERIALS
ISSN	2405-8297
Pages	87
Subtype	Article
Abstract	High-conductivity solid electrolytes are crucial components for the development of Na-based solid state batteries. However the electrolyte structure prototype and corresponding synthesis method are still lacking. The conventional oxide and sulfide electrolytes are precursor-expensive (e.g. Na2S) or energy-intensive in sintering synthesis (e.g. at 1000 degrees C). Here, we propose a novel anti-perovskite solid electrolyte of Na-rich fluorinated sulfate (Na3SO4F) benefiting from Mg and Cl co-doping by solid state reaction from low-cost precursors at moderate temperature (500 degrees C). The tailored dual doping enables an improvement of ionic conductivity by three orders of magnitude close to 10(-4) S cm(-1) at 60 degrees C. The creation of Na vacancies (by aliovalent Mg doping) and lattice expansion (by substituting F sites with larger-sized Cl ions) are responsible for the conductivity upgrade. A Na-Sn/Fe [Fe(CN)(6)](3) solid state battery based on Na2.98Mg0.01SO4F0.95Cl0.05 electrolyte can reversibly run with a first discharge capacity as high as 91.0 mAh g(-1) and a reversible capacity preserved at 77.0 mAh g(-1). This result paves a way to novel anti-perovskite family of fluorinated sulfates as potential alkali metal ion solid electrolytes beyond already reported A(3)OX (A = Li or Na, X = heavy halogen or hydrogenide anions) anti-perovskites.
DOI	10.1016/j.ensm.2020.05.030
WOS Keyword	LITHIUM ; CONDUCTIVITY ; PHASE
Language	英语
WOS Research Area	Chemistry ; Science & Technology - Other Topics ; Materials Science
Publisher	ELSEVIER
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27713
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Fan, SS,Lei, M,Wu, H,et al. A Na-rich fluorinated sulfate anti-perovskite with dual doping as solid electrolyte for Na metal solid state batteries[J]. ENERGY STORAGE MATERIALS,2020:87.
APA	Fan, SS.,Lei, M.,Wu, H.,Hu, JL.,Yin, CL.,...&Li, CL.(2020).A Na-rich fluorinated sulfate anti-perovskite with dual doping as solid electrolyte for Na metal solid state batteries.ENERGY STORAGE MATERIALS,87.
MLA	Fan, SS,et al."A Na-rich fluorinated sulfate anti-perovskite with dual doping as solid electrolyte for Na metal solid state batteries".ENERGY STORAGE MATERIALS (2020):87.

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