High-performance active materials for energy-storage and energy-conversion applications require a novel class of electrodes: ones with a structure conducive to conductivity, large specific surface area, high porosity, and mechanical robustness. Herein, we report the design and fabrication of a new ternary hybrid aerogel. The process entails an in situ assembly of 2D WSe₂ nanosheets and NiFe-LDH nanosheets on a 3D N,S-codoped graphene framework, accomplished by a facile hydrothermal method and electrostatic self-assembly technology. The obtained nanocomposite architecture maximizes synergistic effects among its three 2D-layer components. To assess the performance of this hybrid material, we deployed it as an advanced electrode in overall water splitting and in a supercapacitor. Results in both scenarios attest to its excellent electrochemical properties. Specifically, serving as a catalyst in an oxygen evolution reaction, our nanocomposite requires overpotentials of 1.48 and 1.59 V to obtain current densities of 10 and 100 mA cm^–2, respectively. The hybrid material also efficiently electrocatalyzes hydrogen evolution reactions in base solution, necessitating overpotentials of −50 and −237 mV for current densities of 1.0 and 100 mA cm^–2, respectively. The 3D hybrid, when applied to a symmetric supercapacitor device, achieves 125.6 F g^–1 capacitance at 1 A g^–1 current density. In summary, our study elucidates a new strategy to maximize efficiency via synergetic effects that is likely applicable to other 2D materials.

中文翻译：

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N，S-rGO / WSe ₂ / NiFe-LDH的集成能量气凝胶，用于能量转换和存储

用于能量存储和能量转换应用的高性能活性材料需要新型的电极：具有有助于导电性，大的比表面积，高孔隙率和机械强度的结构的电极。在此，我们报告了一种新型三元混合气凝胶的设计和制造。该过程需要2D WSe _2的原位组装3D N，S掺杂的石墨烯骨架上的纳米片和NiFe-LDH纳米片，通过简便的水热法和静电自组装技术完成。所获得的纳米复合材料体系结构使其三个2D层组件之间的协同效应最大化。为了评估这种混合材料的性能，我们将其作为高级电极用于整个水分解和超级电容器中。两种情况下的结果都证明了其出色的电化学性能。具体来说，作为氧释放反应的催化剂，我们的纳米复合材料需要1.48和1.59 V的超电势才能获得10和100 mA cm ^–2的电流密度， 分别。杂化材料还可以有效地电催化基础溶液中的氢释放反应，分别需要1.0和100 mA cm ^–2的电流下-50和-237 mV的超电势。3D混合器应用于对称超级电容器设备时，在1 A g ^–1的电流密度下可达到125.6 F g ^–1的电容。总而言之，我们的研究阐明了一种通过协同效应最大化效率的新策略，该策略可能适用于其他2D材料。