Toward high performance all solid-state Na batteries: Investigation of electrolytes comprising NaPF6, poly(ethylene oxide) and TiO2

Gayathri Peta; Shaul Bublil; Hadas Alon-Yehezkel; Ortal Breuer; Yuval Elias; Nethanel Shpigel; Miryam Fayena-Greenstein; Diana Golodnitsky; Doron Aurbach

doi:10.1149/1945-7111/ac330d

Toward high performance all solid-state Na batteries: Investigation of electrolytes comprising NaPF₆, poly(ethylene oxide) and TiO₂

Gayathri Peta, Shaul Bublil, Hadas Alon-Yehezkel, Ortal Breuer, Yuval Elias, Nethanel Shpigel, Miryam Fayena-Greenstein, Diana Golodnitsky, Doron Aurbach

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Solid electrolytes based on polyethylene oxide (PEO) have been studied for decades, owing to their facile and low-cost processing, good electrochemical stability, and excellent complexation with alkali metal salts. Complexes of PEO with appropriate sodium salts are well known for ionic conduction. Here, pristine NaPF₆:P(EO)₁₆ and a composite solid electrolyte containing TiO₂ nanowires were investigated as candidates for rechargeable solid-state sodium batteries. Comprehensive electrochemical characterizations were carried out, including ionic conductivity, transference number, and structural stability. At elevated temperatures, the specific capacity of an all-solid-state Na₃Ti₂(PO₄)₃ (Na/NTP) sodium battery was 110 mAh g^-1, higher than room-temperature cells with liquid electrolyte solutions. We attribute this behavior to increased conductivity of the polymer electrolyte, induced by the ceramic nanofiller, combined with enhanced electronic conductivity of the NTP cathode.

Original language	English
Article number	110553
Journal	Journal of the Electrochemical Society
Volume	168
Issue number	11
DOIs	https://doi.org/10.1149/1945-7111/ac330d
State	Published - Nov 2021

Bibliographical note

Publisher Copyright:
© 2021 The Electrochemical Society (“ECS”).

Funding

D. A. gratefully acknowledges funding from the Israel Committee for High Education and Prime Minister Office in the framework of the INREP project, BIRD and the Israel Science Foundation (ISF). We thank Dr. Tirupathi Rao Penki and Mr. Chen Geller for insightful remarks. The authors declare no competing financial interests.

Funders	Funder number
Israel Committee for High Education and Prime Minister Office
BIRD Foundation
Israel Science Foundation

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10.1149/1945-7111/ac330d

Cite this

Peta, G., Bublil, S., Alon-Yehezkel, H., Breuer, O., Elias, Y., Shpigel, N., Fayena-Greenstein, M., Golodnitsky, D., & Aurbach, D. (2021). Toward high performance all solid-state Na batteries: Investigation of electrolytes comprising NaPF₆, poly(ethylene oxide) and TiO₂. Journal of the Electrochemical Society, 168(11), Article 110553. https://doi.org/10.1149/1945-7111/ac330d

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abstract = "Solid electrolytes based on polyethylene oxide (PEO) have been studied for decades, owing to their facile and low-cost processing, good electrochemical stability, and excellent complexation with alkali metal salts. Complexes of PEO with appropriate sodium salts are well known for ionic conduction. Here, pristine NaPF6:P(EO)16 and a composite solid electrolyte containing TiO2 nanowires were investigated as candidates for rechargeable solid-state sodium batteries. Comprehensive electrochemical characterizations were carried out, including ionic conductivity, transference number, and structural stability. At elevated temperatures, the specific capacity of an all-solid-state Na3Ti2(PO4)3 (Na/NTP) sodium battery was 110 mAh g-1, higher than room-temperature cells with liquid electrolyte solutions. We attribute this behavior to increased conductivity of the polymer electrolyte, induced by the ceramic nanofiller, combined with enhanced electronic conductivity of the NTP cathode.",

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AU - Elias, Yuval

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