Efficient Proton Conductor Based on Bismuth Oxide Clusters and Polyoxometalates

Yingjie Song; Qing Fang; Bailing Liu; Bo Hu; Zhongmin Su

doi:10.1021/acs.langmuir.3c01441

Efficient Proton Conductor Based on Bismuth Oxide Clusters and Polyoxometalates

Langmuir. 2023 Oct 17;39(41):14511-14518. doi: 10.1021/acs.langmuir.3c01441. Epub 2023 Oct 2.

Authors

Yingjie Song¹, Qing Fang¹, Bailing Liu¹, Bo Hu², Zhongmin Su^{1

3}

Affiliations

¹ Jilin Provincial International Joint Research Center of Photo-functional Materials and Institution Chemistry, School of Chemistry and Environmental Engineering, Jilin Provincial Science and Technology Innovation Centre of Optical Materials and Chemistry, Changchun University of Science and Technology, Changchun 130022, China.
² National & Local United Engineering Laboratory for Power Battery, Department of Chemistry, Northeast Normal University, Changchun 130024, China.
³ State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130021, China.

PMID: 37782751
DOI: 10.1021/acs.langmuir.3c01441

Abstract

Developing new solid-state electrolyte materials for improving the proton conductivity remains an important challenge. Herein, a novel two-dimensional layered solid-state proton conductor Bi₂O₂-SiW₁₂ nanocomposite, based on silicotungstic acid (H₄SiW₁₂O₄₀) and Bi(NO₃)₃·5H₂O, was synthesized and characterized. The composite consists of a layered cation framework [Bi₂O₂]²⁺ and interlayer-embedded counteranionic [SiW₁₂O₄₀]^4-, which forms continuous hydrogen bond (O-H···O) networks through the interaction of adjacent oxygen atoms on the surface of the [Bi₂O₂]²⁺ and oxygen atoms of the H₄SiW₁₂O₄₀. Facile proton transfer along these pathways endows the Bi₂O₂-SiW₁₂ (30:1) nanocomposite with an excellent proton conductivity of 3.61 mS cm^-1 at 90 °C and 95% relative humidity, indicating that the nanocomposite has good prospects as a highly efficient proton conductor.