Ameri Bahareh, Mohammadi Zardkhoshoui Akbar, Hosseiny Davarani Saied Saeed
Department of Chemistry, Shahid Beheshti University, G. C., 1983963113, Evin, Tehran, Iran.
Dalton Trans. 2021 Jun 22;50(24):8372-8384. doi: 10.1039/d1dt01215k.
Metal-organic framework (MOF) derived nanoarchitectures have special features, such as high surface area (SA), abundant active sites, exclusive porous networks, and remarkable supercapacitive performance when compared to traditional nanoarchitectures. Herein, we propose a viable strategy for the synthesis of hollow manganese nickel selenide spheres comprising nanosheets supported on the nickel foam (denoted as MNSe@NF) from the MOF. The MNSe nanostructures can demonstrate enriched active sites, and shorten the ion-electron diffusion pathways. When the MNSe@NF electrode is used as a cathode electrode for a hybrid supercapacitor, the electrode reflected impressive supercapacitive properties with a high capacity of 325.6 mA h g-1 (1172.16 C g-1) at 2 A g-1, an exceptional rate performance of 86.6% at 60 A g-1, and remarkable longevity (3.2% capacity decline after 15 000 cycles). Also, the assembled MNSe@NF∥AC@NF hybrid supercapacitors employing activated carbon on the nickel foam (AC@NF, anode electrode) and MNSe@NF (cathode electrode) revealed an impressive energy density of 66.1 W h kg-1 at 858.45 W kg-1 and an excellent durability of 94.1% after 15 000 cycles.
与传统纳米结构相比，金属有机框架（MOF）衍生的纳米结构具有特殊的特性，如高表面积（SA）、丰富的活性位点、独特的多孔网络和卓越的超级电容性能。在此，我们提出了一种可行的策略，用于从MOF合成由负载在泡沫镍上的纳米片组成的中空锰镍硒球（表示为MNSe@NF）。MNSe纳米结构可以展示丰富的活性位点，并缩短离子-电子扩散路径。当MNSe@NF电极用作混合超级电容器的阴极时，该电极表现出令人印象深刻的超级电容性能，在2 A g-1下具有325.6 mA h g-1（1172.16 C g-1）的高容量，在60 A g-1下具有86.6%的优异倍率性能，以及显著的长寿命（15000次循环后容量下降3.2%）。此外，使用负载在泡沫镍上的活性炭（AC@NF，阳极电极）和MNSe@NF（阴极电极）组装的MNSe@NF∥AC@NF混合超级电容器在858.45 W kg-1下显示出66.1 W h kg-1的令人印象深刻的能量密度，并且在15000次循环后具有94.1%的优异耐久性。
