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Selective A-Site Exsolution and Phase Transition in Perovskite Electrode for Efficient Flexible Znic-Air Batteries
Wenyu Zhang1, Nan Zhang1, Wenhui Zhu1
1Department Faculty of Material and Chemistry, China University of Geosciences, Wuhan, 430074, China.
Small (Weinheim an Der Bergstrasse, Germany)
|February 14, 2025
Summary
This study introduces a novel BaO/PBMC heterostructure for flexible zinc-air batteries (ZABs). This design enhances oxygen reaction kinetics, leading to superior power and stability in ZABs.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Flexible electronics demand high-performance energy storage like zinc-air batteries (ZABs).
- Sluggish oxygen evolution and reduction reactions (OER/ORR) kinetics hinder ZAB performance.
- Novel electrode materials are crucial for advancing ZAB technology.
Purpose of the Study:
- To develop a new BaO/PBMC heterostructure for improved air electrodes in flexible ZABs.
- To investigate the effect of plasma treatment on perovskite structure and surface.
- To understand the mechanism of enhanced OER/ORR kinetics at the heterojunction interface.
Main Methods:
- Fabrication of BaO nanoparticles anchored on PrBaMn1.5Co0.5O6-δ (PBMC) nanofibers via a plasma method.
- Utilizing plasma treatment for selective A-site exsolution and phase transformation.
- Employing theoretical calculations to analyze interfacial electronic redistribution and energy barriers.
Main Results:
- A unique BaO/PBMC heterostructure was successfully synthesized.
- Plasma treatment induced selective Ba exsolution and perovskite phase transition.
- The BaO/PBMC heterojunction effectively lowered OER/ORR energy barriers, enhancing interfacial kinetics.
- The BaO/PBMC air electrode demonstrated superior peak power density and stability in flexible solid-state ZABs.
Conclusions:
- The novel BaO/PBMC heterostructure significantly improves the performance of flexible ZABs.
- Selective A-site exsolution and phase transition are effective strategies for designing advanced energy conversion materials.
- This approach offers new insights for developing next-generation energy storage and conversion technologies.

