Microwave-assisted synthesis of Ce·La-Hydroxides based binary composite for solid state asymmetric supercapacitor

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2025-09-03 DOI:10.1016/j.jelechem.2025.119460

Dadaso Mohite , P.E. Lokhande , Udayabhaskar Rednam , Bandar Ali Al-Asbahi , Aziz A. Aziz

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Abstract

The growing demand for reliable energy storage in portable electronics, electric vehicles, and smart grid networks has driven rapid progress in supercapacitor research. Although supercapacitors are valued for their high-power output, excellent cycle life, and rapid charge–discharge response, their limited energy density continues to be a key challenge. To overcome this issue the development of novel electrode materials is inevitable. Thereby, considering the potential of rare-earth metal hydroxides, cerium–lanthanum hydroxide (Ce·La(OH)₃) binary composite was synthesized through a microwave-assisted co-precipitation technique, providing a rapid and scalable preparation route. The synergistic incorporation of Ce and La enhanced redox activity and structural stability, thereby improving electrochemical performance. The single-electrode system based on this composite delivered a remarkable specific capacitance of 502C g⁻¹ at 1 A g⁻¹ along with strong rate capability. Furthermore, in asymmetric device assembly, the composite achieved an energy density of 23 Wh kg⁻¹ and a power density of 750 W kg⁻¹. Long-term cycling tests demonstrated outstanding durability, maintaining 95 % of capacitance even after 10,000 cycles. These results highlight Ce·La(OH)₃ as a highly stable and efficient electrode candidate for next-generation energy storage applications.

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微波辅助合成固体非对称超级电容器用Ce·la -氢氧化物二元复合材料

便携式电子产品、电动汽车和智能电网对可靠储能的需求不断增长，推动了超级电容器研究的快速发展。尽管超级电容器因其高功率输出、优异的循环寿命和快速的充放电响应而受到重视，但其有限的能量密度仍然是一个关键挑战。为了克服这一问题，开发新型电极材料是不可避免的。因此，考虑到稀土金属氢氧化物的潜力，通过微波辅助共沉淀法合成了铈-氢氧化镧（Ce·La（OH）₃）二元复合材料，提供了一种快速、可扩展的制备路线。Ce和La的协同掺入增强了氧化还原活性和结构稳定性，从而改善了电化学性能。基于该复合材料的单电极系统在1 a g−1时具有502C g−1的显着比电容以及强大的速率能力。此外，在非对称器件组装中，该复合材料实现了23 Wh kg - 1的能量密度和750 W kg - 1的功率密度。长期循环测试显示出出色的耐久性，即使在10,000次循环后仍保持95%的电容。这些结果表明Ce·La（OH）₃是下一代储能应用中高度稳定和高效的电极候选者。

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.