SrTiO3/还原氧化石墨烯复合材料在大功率储能和析氧反应中的电化学研究。

IF 2.3 3区 化学 Q3 CHEMISTRY, PHYSICAL
Dushyant K Sharma, Salahuddeen Buhari, Divyanshi Soni, Susanta S Roy, Binson Babu
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引用次数: 0

摘要

锶钛钙钛矿氧化物(SrTiO3, STO)已成为一种有前途的能源应用材料,但其绝缘性质限制了其性能。在这项研究中,我们开发了一种固定在还原氧化石墨烯(rGO)上的STO颗粒(600-700 nm)的分层结构,并评估了它们在储能和水分解应用中的双重功能。由于具有较大的电化学表面积和非扩散控制的电荷存储过程,STO-rGO复合材料在水溶液中表现出增强的大功率电化学性能。此外,用STO-rGO复合材料制备的对称超级电容器和非对称超级电容器表现出优异的电化学性能,在10,000次循环后分别实现了90%和95%的稳定循环稳定性,突出了STO-rGO复合材料作为高功率电极的潜力。此外,STO- rgo复合材料表现出优异的析氧反应(OER)活性,与原始STO相比,其过电位低至303 mV,质量活性高,周转频率(TOF)提高,具有更好的长期循环稳定性,在10 mA cm⁻²电流密度下进行24小时计时电位测定测试后仍保持性能。这项工作证明了锶基钙钛矿材料在储能和水分解应用中的双重功能,通过掺入还原氧化石墨烯,其性能得到了显著提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electrochemical Studies of SrTiO3/Reduced Graphene Oxide Composite for High-Power Energy Storage and Oxygen Evolution Reaction Applications.

Strontium titanium perovskite oxide (SrTiO3, STO) has emerged as a promising material for energy applications, but its insulating nature limits its performance. Herein, a hierarchical structure of STO particles (600-700 nm) anchored onto reduced graphene oxide (rGO) is developed and their dual functionality in energy storage and water-splitting applications is evaluated. The STO-rGO composites exhibit enhanced high-power electrochemical performance in aqueous electrolytes, driven by their large electrochemical surface area and nondiffusion-controlled charge storage process. Furthermore, symmetric supercapacitors and asymmetric supercapacitors fabricated with STO-rGO composites demonstrate excellent electrochemical performance, achieving stable cycling stability with 90% and 95% capacity retention after 10,000 cycles, respectively, highlighting the potential of STO-rGO composites as high-power electrodes. Additionally, STO-rGO composites demonstrate superior oxygen evolution reaction activity, with a low overpotential of 303 mV, high mass activity, and an improved turnover frequency compared to pristine STO, with better long-term cycling stability, retaining performance after a 24 h chronopotentiometry test at a current density of 10 mA cm-2. This work demonstrates the dual functionality of strontium-based perovskite materials for energy storage and water-splitting applications, with significantly enhanced performance achieved through the incorporation of rGO.

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来源期刊
Chemphyschem
Chemphyschem 化学-物理:原子、分子和化学物理
CiteScore
4.60
自引率
3.40%
发文量
425
审稿时长
1.1 months
期刊介绍: ChemPhysChem is one of the leading chemistry/physics interdisciplinary journals (ISI Impact Factor 2018: 3.077) for physical chemistry and chemical physics. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies. ChemPhysChem is an international source for important primary and critical secondary information across the whole field of physical chemistry and chemical physics. It integrates this wide and flourishing field ranging from Solid State and Soft-Matter Research, Electro- and Photochemistry, Femtochemistry and Nanotechnology, Complex Systems, Single-Molecule Research, Clusters and Colloids, Catalysis and Surface Science, Biophysics and Physical Biochemistry, Atmospheric and Environmental Chemistry, and many more topics. ChemPhysChem is peer-reviewed.
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