Insight into Ion Diffusion Dynamics/Mechanisms and Electronic Structure of Highly Conductive Sodium-Rich Na 3+ x La x Zr 2- x Si 2 PO 12 (0 ≤ x ≤ 0.5) Solid-State Electrolytes.

التفاصيل البيبلوغرافية
العنوان:	Insight into Ion Diffusion Dynamics/Mechanisms and Electronic Structure of Highly Conductive Sodium-Rich Na 3+ x La x Zr 2- x Si 2 PO 12 (0 ≤ x ≤ 0.5) Solid-State Electrolytes.
المؤلفون:	Sun F; Soochow University-Western University Center for Synchrotron Radiation Research, Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China.; Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada., Xiang Y; State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China., Sun Q; Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada., Zhong G; Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen 361021, China., Banis MN; Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada., Li W; Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada., Liu Y; Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada., Luo J; Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada., Li R; Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada., Fu R; National High Magnetic Field Laboratory, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, United States., Sham TK; Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada., Yang Y; State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China., Sun X; Soochow University-Western University Center for Synchrotron Radiation Research, Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China., Sun X; Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada.
المصدر:	ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2021 Mar 24; Vol. 13 (11), pp. 13132-13138. Date of Electronic Publication: 2021 Mar 15.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: American Chemical Society Country of Publication: United States NLM ID: 101504991 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1944-8252 (Electronic) Linking ISSN: 19448244 NLM ISO Abbreviation: ACS Appl Mater Interfaces Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة:	Original Publication: Washington, D.C. : American Chemical Society
مستخلص:	Solid-state electrolytes (SSEs) have attracted considerable attention as an alternative for liquid electrolytes to improve safety and durability. Sodium Super Ionic CONductor (NASICON)-type SSEs, typically Na 3 Zr 2 Si 2 PO 12 , have shown great promise because of their high ionic conductivity and low thermal expansivity. Doping La into the NASICON structure can further elevate the ionic conductivity by an order of magnitude to several mS/cm. However, the underlying mechanism of ionic transportation enhancement has not yet been fully disclosed. Herein, we fabricate a series of Na 3+ x La x Zr 2- x Si 2 PO 12 (0 ≤ x ≤ 0.5) SSEs. The electronic and local structures of constituent elements are studied via synchrotron-based X-ray absorption spectroscopy, and the ionic dynamics and Na-ion conduction mechanism are investigated by solid-state nuclear magnetic resonance spectroscopy. The results prove that La ³⁺ ions exist in the form of phosphate impurities such as Na 3 La(PO 4 ) 2 instead of occupying the Zr ⁴⁺ site. As a result, the increased Si/P ratio in the NASICON phase, accompanied by an increase in the sodium ion occupancy, makes a major contribution to the enhancement of ionic conductivity. The spin-lattice relaxation time study confirms the accelerated Na ⁺ motions in the altered NASICON phase. Modifications on the Si/P composition can be a promising strategy to enhance the ionic conductivity of NASICON.
فهرسة مساهمة:	Keywords: La doping; NASICON; NMR; XAS; diffusion mechanism; high ionic conductivity; solid-state electrolyte
تواريخ الأحداث:	Date Created: 20210315 Latest Revision: 20210325
رمز التحديث:	20231215
DOI:	10.1021/acsami.0c21882
PMID:	33719407
قاعدة البيانات:	MEDLINE

Find this issue from the American Chemical Society

الوصف
تدمد:	1944-8252
DOI:	10.1021/acsami.0c21882