Impact of Ca ions substitution at A-site on LaCoO3 perovskite energy applications

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-04-26 DOI:10.1016/j.mseb.2025.118343

Xin Sun , Zhenbing Pei , Xu Guo , Xin Ye , Lei Wang , Yamei Zhang , Songtao Dong

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Abstract

Lanthanide-based perovskites are promising candidates for supercapacitor applications due to their high crystallinity, reversible redox capabilities, diverse electrical properties, oxygen-rich vacancies, stable structures, ease of synthesis, and cost-effectiveness. This study synthesized La_1-xCa_xCoO₃ (x = 0, 0.1, 0.15, and 0.2) samples using the sol–gel method. The La_0.85Ca_0.15CoO₃ sample shows a charge transfer resistance of 0.68 Ω and a specific surface area of 44.52 m²/g. The La_0.85Ca_0.15CoO₃ sample exhibits a specific capacitance of 284.4F/g at a current density of 1 A/g, which is 3.38 times greater than that of the intrinsic sample. The charge storage mechanism involving the oxygen anions was explored through an overcharge and discharge process, revealing that elemental Ca doping markedly enhances the charge storage capacity associated with oxygen intercalation in the LaCoO₃ system. These results suggest that Ca-substituted A-site of perovskites possess significant potential for supercapacitor applications.

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.