Modulating structure and electrochemical performance of LaMnO3–NiO composites through auto-combustion
Abstract
LaMnO3–NiO (LM-NiO) composites were synthesized via a facile auto-combustion method to optimize the synergistic interaction between perovskite and transition metal oxide phases for high-performance supercapacitor electrodes. Systematic variation of the LaMnO3:NiO weight ratio revealed that the 7:3 composition exhibits a mesoporous architecture with the highest specific surface area (22 m2 g−1) and well-balanced mixed-valence states of Mn (Mn2+/Mn3+/Mn4+) and Ni (Ni2+/Ni3+). These structural and electronic features enable superior redox activity, delivering a high specific capacitance of 689 F/g at 10 mV s−1 and 694 F g−1 at 1 A g−1, along with excellent cycling stability (86% capacitance retention after 5000 cycles). Enhanced performance of the composite arises from improved ion-diffusion pathways, increased active sites, and reduced charge-transfer resistance, enabled by interfacial coupling between LaMnO3 and NiO. This work demonstrates an effective strategy for tailoring perovskite–oxide composites to achieve high-energy-density, long-cycle-life supercapacitor electrodes.
Publication Title
Next Materials
Recommended Citation
Dhakal, A., Perez, F., & Mishra, S. (2026). Modulating structure and electrochemical performance of LaMnO3–NiO composites through auto-combustion. Next Materials, 13 https://doi.org/10.1016/j.nxmate.2026.102791
