Presentation Title

Synthesis of Proposed System of Ionic-Conducting Materials XAgTa4O11 (X: Na, K, Rb, Cs) and NaAgTa4-yMoyO11

Faculty Mentor

Dr. Allyson Fry-Petit

Start Date

18-11-2017 10:00 AM

End Date

18-11-2017 11:00 AM

Location

BSC-Ursa Minor 105

Session

Poster 1

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

Silver tantalates with the structure, AgTa4O11, appear to have promising applications for materials development of ion transporters, particularly for use in batteries. XAgTa4O11 (X: Na, K, Cs, Rb) have adopted a similar structure to that of the known P21/n monoclinic compound, NaAgNb4O11. In the published structure of NaAgNb4O11 distinctive pores exist that house the sodium and silver ions, further stimulating interest in the potential ion conducting properties of the proposed system of NaAgTa4O11 analogs. XAgTa4O11 (X: Na, K, Cs, Rb) have been synthesized using a flux growth technique followed by standard solid state techniques. X-ray powder diffraction and Rietveld refinement were used to successfully refine the structures of the proposed system of conducting materials. Due to the lack of d orbital electrons and a lack of color in the proposed AgTa4O11 analogs, molybdenum (Mo) was doped into the K and Na analogs to increase the probability that the compounds have conductive properties. Based on X-ray powder diffraction analyses on the NaAgTa4-yMoyO11 compounds synthesized with either MoCl5 or MoO3, the structures were not only comparable to NaAgTa4O11, but also exhibited a surprising color change, increasing the likelihood that the Na compounds have ion conducting properties. Moreover, the use of MoCl5 has possibly led to the incorporation of chlorine into the NaAgTa4-yMoyO11 crystal structure, an atypical finding. Thus, an oxy-chloride material has emerged amongst the proposed system of Mo-doped NaAgTa4O11 compounds having a structure compatible with battery materials.

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Nov 18th, 10:00 AM Nov 18th, 11:00 AM

Synthesis of Proposed System of Ionic-Conducting Materials XAgTa4O11 (X: Na, K, Rb, Cs) and NaAgTa4-yMoyO11

BSC-Ursa Minor 105

Silver tantalates with the structure, AgTa4O11, appear to have promising applications for materials development of ion transporters, particularly for use in batteries. XAgTa4O11 (X: Na, K, Cs, Rb) have adopted a similar structure to that of the known P21/n monoclinic compound, NaAgNb4O11. In the published structure of NaAgNb4O11 distinctive pores exist that house the sodium and silver ions, further stimulating interest in the potential ion conducting properties of the proposed system of NaAgTa4O11 analogs. XAgTa4O11 (X: Na, K, Cs, Rb) have been synthesized using a flux growth technique followed by standard solid state techniques. X-ray powder diffraction and Rietveld refinement were used to successfully refine the structures of the proposed system of conducting materials. Due to the lack of d orbital electrons and a lack of color in the proposed AgTa4O11 analogs, molybdenum (Mo) was doped into the K and Na analogs to increase the probability that the compounds have conductive properties. Based on X-ray powder diffraction analyses on the NaAgTa4-yMoyO11 compounds synthesized with either MoCl5 or MoO3, the structures were not only comparable to NaAgTa4O11, but also exhibited a surprising color change, increasing the likelihood that the Na compounds have ion conducting properties. Moreover, the use of MoCl5 has possibly led to the incorporation of chlorine into the NaAgTa4-yMoyO11 crystal structure, an atypical finding. Thus, an oxy-chloride material has emerged amongst the proposed system of Mo-doped NaAgTa4O11 compounds having a structure compatible with battery materials.