Chemical Research in Chinese Universities ›› 2026, Vol. 42 ›› Issue (4): 1275-1281.doi: 10.1007/s40242-026-6121-1

• Research Articles • Previous Articles     Next Articles

Electrochemical Proton Injection Induced Phase Transitions in Hydrothermally Synthesized A-Site Multi-doped Manganate Perovskites

PANG Shiqi1, GUO Junda2, LIANG Qiujuan1, ZHENG Beining2, HAN Mei1, FENG Shouhua1   

  1. 1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China;
    2. College of Physics, Jilin University, Changchun 130012, P. R. China
  • Received:2026-05-29 Revised:2026-07-02 Online:2026-08-01 Published:2026-07-28
  • Contact: FENG Shouhua,E-mail:shfeng@jlu.edu.cn;HAN Mei,E-mail:hanmei@jlu.edu.cn E-mail:shfeng@jlu.edu.cn;hanmei@jlu.edu.cn
  • Supported by:
    This work was supported by the Jilin Provincial Natural Science Foundation, China (No. 20240101171JC), the Science and Technology Research Project of the Education Department of Jilin Province, China (No. JJKH20250057KJ), the National Key R&D Program of China (No. 2023YFA1506300), the Science and Technology Development Program Project of Jilin Province, China (No. SKL202502003JC), and the Science and Technology Development Plan Project of Jilin Province, China (No. SKL202402007).

Abstract: Phase transitions in strongly correlated system materials have good reproducibility due to the differences before and after the transition, and they have application prospects in fields, such as memory storage and electrochromic materials. Driving protons in ionic liquids into the material lattice using an electric field is an effective way to change the electronic structure of strongly correlated systems and induce their phase transitions. In this study, we used the electrochemical proton injection method to introduce protons into La1-x-yCaxKyMnO3 manganate perovskites with different properties. The combination of protons with O in the lattice hinders the double exchange interaction, preventing effective electron transfer and thereby triggering a phase transition. This work complements the understanding of the effects of proton injection on bulk materials, deepens the understanding of the mechanism of proton injection-induced phase transitions, and provides new ideas for the preparation of novel multifunctional devices.

Key words: Proton injection, Manganate perovskite, Induced phase transition, Strongly correlated system