DataVXACS Applied Electronic MaterialsPaper
journal article·2024-02-27

Significantly Improved Proton Conduction in LaBaGaO4through Li-Doping

Xiaoxu Duan, Wenzhuo Chen, Keke Hou, Jungu Xu

ACS Applied Electronic Materials· Volume 6· Issue 2
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Source abstract

Abstract

The La 1– x Ba 1+ x GaO 4–0.5 x ( x ≤ 0.2) materials were previously reported to be proton conductors, but the relatively low conductivity, e.g., ∼4.0 × 10 –4 S/cm at 600 °C, hindered their further practical applications. Herein, we show that the lithium substitution for gallium could significantly improve the proton conductivity, ∼1.12 × 10 –3 –6.38 × 10 –3 S/cm over 350–600 °C, which was more than one order of magnitude higher than La 1– x Ba 1+ x GaO 4–0.5 x and comparable to the state-of-the-art BaCeO 3 -based materials. Such significantly improved proton conductivities were attributed to the obviously improved oxygen vacancy concentration coupled with a phase transition from the noncentrosymmetric structure ( P 2 1 2 1 2 1 ) to a higher symmetry centrosymmetric cell ( P cca). These Li-doped LaBaGaO 4 materials with remarkably high proton conductivities present a big advance and show great application prospects for being used as electrolytes for proton-conducting fuel cells.
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Research context

Energy storage

OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Magnetic and transport properties of perovskites and related materials · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials; Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices; Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources in Guangxi; College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China

Funding

Natural Science Foundation of Guangxi Zhuang Autonomous Region · National Natural Science Foundation of China · Key Technology Research and Development Program of Shandong Province · Key Laboratory of New Processing Technology for Nonferrous Metal & Materials · Guangxi Key Laboratory of Optical and Electronic Materials and Devices

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