Investigation of the Structure and Electrochemical Performance of Perovskite Oxide La1−xCaxCrO3 Utilized as Electrode Materials for Supercapacitors
Source abstract
Abstract
Lanthanide perovskite materials are promising candidates for supercapacitor applications. In this study, a series of La1−xCaxCrO3 (x = 0–0.2) materials were prepared by sol-gel method, incorporating bivalent ions calcium at A-site. La0.85Ca0.15CrO3 exhibited the lowest charge transfer resistance and highest specific surface area. At 1 A/g, La0.85Ca0.15CrO3 achieved a maximum specific capacitance of 306 F/g, about 2.3 times higher than that of the LaCrO3 (133 F/g). Based on the observed data, a mechanism involving oxygen anion charge storage during the charging-discharging process is proposed. After 5000 long cycle, the coulomb efficiency of the electrode remains above 94%. These results demonstrate that Ca-substituted compounds exhibit significant potential for A-site engineering in supercapacitor applications.
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Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced battery technologies research · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Funding
Jiangsu Practice Innovation Program · National Natural Science Foundation of China
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