具有高性能非对称超级电容器的多通道超导通路的空心管状rGO–NiMoO <sub>4</sub> @ Ni–Co–S混合核壳电极的流行设计,ACS Applied Materials & Interfaces

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具有高性能非对称超级电容器的多通道超导通路的空心管状rGO–NiMoO ₄ @ Ni–Co–S混合核壳电极的流行设计
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-04-12 , DOI: 10.1021/acsami.1c00137
Jiwan Acharya ₁ , Gunendra Prasad Ojha ₁ , Byoung-Suhk Kim ₂ , Bishweshwar Pant ₁ , Mira Park ₁

Affiliation

将具有多相过渡金属硫化物修饰的多氧化还原活性多相过渡金属氧化物装饰在由rGO（还原氧化石墨烯）支撑的导电基材上的严格指定空心和多孔电活性材料从来都不是一件容易的事，因为它具有很好的配位关系硫向过渡金属的迁移。在此，采用具有成本效益的水热生长方法，然后采用金属有机骨架（MOF）介导的硫化方法，以在rGO涂层的Ni泡沫（rGO）上实现类似毛刺的Ni-Co-S纳米材料集成的中空和多孔NiMoO ₄纳米管。 –NiMoO ₄@ Ni–Co–S）作为超级电容器的电极材料。蚀刻和硫化过程之后，rGO–Co–MOF模板的开放框架不仅能够创建NiMoO ₄纳米棒的管状结构，而且还提供了便利的离子电子路径，以促进混合复合电极的快速法拉第反应。由于独特的中空和管状结构，制成的rGO–NiMoO ₄ @ Ni–Co–S电极在1 A g ^–1时具有318 mA hg ^–1的高比容量，在10,000次后的循环性能高达88.87％在三电极配置的2 M KOH水溶液中进行连续的充放电循环。此外，组装好的rGO–NiMoO ₄@ Ni–Co–S // rGO–MDC（源自MOF的碳）非对称超级电容器装置在801.8 W kg ^–1的功率密度下，具有57.24 W h kg ^–1的令人满意的能量密度，具有90.89％的令人敬佩的寿命经过10,000次重复循环。

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Modish Designation of Hollow-Tubular rGO–NiMoO4@Ni–Co–S Hybrid Core–shell Electrodes with Multichannel Superconductive Pathways for High-Performance Asymmetric Supercapacitors

The scrupulous designation of hollow and porous electroactive materials incorporating prolific redox-active polyphase transition-metal oxide decorated with polyphase transition-metal sulfide onto rGO (reduced graphene oxide)-supported conductive substrate has never been an easy task due to the very good coordination affair of sulfur toward transition metals. Herein, cost-effective hydrothermal growth followed by a metal–organic framework (MOF)-mediated sulfidation approach is employed to achieve burl-like Ni–Co–S nanomaterial-integrated hollow and porous NiMoO₄ nanotubes onto rGO-coated Ni foam (rGO–NiMoO₄@Ni–Co–S) as the electrode material for supercapacitors. The open framework of the rGO–Co–MOF template after the etching and sulfidation process not only enables the creation of a tubular structure of NiMoO₄ nanorods but also provides convenient ion–electron pathways to promote rapid faradic reactions for the hybrid composite electrode. Owing to the unique hollow and tubular structure, the as-fabricated rGO–NiMoO₄@Ni–Co–S electrode exhibits a high specific capacity of 318 mA h g^–1 at 1 A g^–1 and remarkable cyclic performance of 88.87% after 10,000 consecutive charge–discharge cycles in an aqueous 2 M KOH electrolyte on a three-electrode configuration. Moreover, the assembled rGO–NiMoO₄@Ni–Co–S//rGO–MDC (MOF-derived carbon) asymmetric supercapacitor device exhibits a satisfactory energy density of 57.24 W h kg^–1 at a power density of 801.8 W kg^–1 with an admirable life span of 90.89% after 10,000 repeated cycles.

更新日期：2021-04-21

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