水热合成Zn0·4Ni0·60纳米片：一种用于超级电容器和析氧反应的双功能材料

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physics and Chemistry of Solids Pub Date : 2025-06-02 DOI:10.1016/j.jpcs.2025.112907

Sabiya S. Bagwan , Maqsood R. Waikar , Azeem M. Bagwan , Mayuri G. Magdum , Satyashila D. Ghongade , Shital J. Shinde , Aniket R. Sonkawade , Annasaheb V. Moholkar , Hemraj M. Yadav , Rajendra G. Sonkawade

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引用次数: 0

摘要

采用水热法在不锈钢表面直接生长无粘结剂Zn0·4Ni0·60 （ZNO）纳米片（NFs），制备了一种既用于超级电容器又用于水分解的双功能电极。结构和成分分析证实了ZNO的形成，而形貌分析证实了ZNO的纳米片状形态。x射线光电子能谱（XPS）分析深入了解ZNO-NFs的表面组成和氧化态。通过在不同电解质下的电化学性能对其储能和转化进行了评价。ZNO-NFs电极在1 M KOH条件下的比电容Cs为502 F g−1，循环稳定性为91%。采用ZNO-NFs-SS//AC-SS结构的非对称液相体系在1ma g−1时的比电容（Cs）为44.82 F g−1。它的能量密度（Ed）为13.33 W kg - 1，功率密度（Pd）为615.38 Wh kg - 1，在2000 CV循环后保持83%的性能，表现出优异的稳定性。ZNO-NFs电极表现出优异的电催化性能，包括过电位最低（303 mV），合适的Tafel斜率（70 mV dec−1），在1 M KOH中10 mV s−1时的最高电化学活性表面积（33.75 cm2）。因此，ZNO-NFs在1 M KOH电解质中的优异性能和高耐久性使其成为储能和水分解应用中高效电极供电的理想候选者。

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Hydrothermally synthesized Zn0·4Ni0·6O nanoflakes: A dual-function material for supercapacitor and oxygen evolution reaction

Binder-free Zn₀_·₄Ni₀_·₆O (ZNO) nanoflakes (NFs) were directly grown on stainless steel (SS) via a hydrothermal method, creating a dual-functional electrode for both supercapacitors and water splitting. Structural and compositional analyses verified the formation of cubic ZNO, while morphological analysis confirmed nanoflake morphology. X-ray Photoelectron Spectroscopy (XPS) analysis was performed to gain deeper insight into the surface composition and oxidation states of ZNO-NFs. The energy storage and conversion were evaluated by electrochemical performance in different electrolytes. The ZNO-NFs electrode exhibited a specific capacitance (Cs) in 1 M KOH was 502 F g⁻¹ at 1 mA g⁻¹ with excellent cycling stability of 91 %. The asymmetric liquid state system using ZNO-NFs-SS//AC-SS configuration achieved a specific capacitance (Cs) of 44.82 F g⁻¹ at 1 mA g⁻¹. It also exhibited an energy density (Ed) of 13.33 W kg⁻¹ and a power density (Pd) of 615.38 Wh kg⁻¹, maintaining 83 % of its performance after 2000 CV cycles, indicating excellent stability. The ZNO-NFs electrodes exhibited remarkable electrocatalytic properties, including the lowest overpotential (303 mV), a suitable Tafel slope (70 mV dec⁻¹), and the highest electrochemical active surface area (33.75 cm²) at 10 mV s⁻¹ in 1 M KOH. Consequently, the superior performance with high durability of ZNO-NFs in a 1 M KOH electrolyte makes them ideal candidates for powering efficient electrodes in energy storage and water-splitting applications.

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来源期刊

Journal of Physics and Chemistry of Solids 工程技术-化学综合

CiteScore

7.80

自引率

2.50%

发文量

605

审稿时长

40 days

期刊介绍： The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems. Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal: Low-dimensional systems Exotic states of quantum electron matter including topological phases Energy conversion and storage Interfaces, nanoparticles and catalysts.