Mohammadi Zardkhoshoui Akbar, Ameri Bahareh, Hosseiny Davarani Saied Saeed
Department of Chemistry, Shahid Beheshti University, G. C., 1983963113, Evin, Tehran, Iran.
Nanoscale. 2021 Feb 11;13(5):2931-2945. doi: 10.1039/d0nr08234a.
Thanks to the attractive structural characteristics and unique physicochemical properties, mixed metal selenides (MMSes) can be considered as encouraging electrode materials for energy storage devices. Herein, a straightforward and efficient approach is used to construct multi-shelled nickel-manganese selenide hollow spheres (MSNMSeHSs) as cathode and double-shell nickel-iron selenide hollow spheres (DSNFSeHSs) as anode electrode materials by tuning shell numbers for supercapacitors. The as-designed MSNMSeHS electrode can deliver a splendid capacity of ∼339.2 mA h g-1/1221.1 C g-1, impressive rate performances of 78.8%, and considerable longevity of 95.7%. The considerable performance is also observed for the DSNFSeHS electrode with a capacity of 258.4 mA h g-1/930.25 C g-1, rate performance of 75.5%, and longevity of 90.9%. An efficient asymmetric apparatus (MSNMSeHS||DSNFSeHS) fabricated by these two electrodes depicts the excellent electrochemical features (energy density of ≈112.6 W h kg-1 at 900.8 W kg-1) with desirable longevity of ≈94.4%.
由于具有吸引人的结构特性和独特的物理化学性质，混合金属硒化物（MMSes）可被视为用于储能装置的令人鼓舞的电极材料。在此，通过调节用于超级电容器的壳层数，采用一种直接且高效的方法来构建多壳层镍锰硒化物空心球（MSNMSeHSs）作为阴极以及双壳层镍铁硒化物空心球（DSNFSeHSs）作为阳极电极材料。所设计的MSNMSeHS电极可提供约339.2 mA h g-1/1221.1 C g-1的出色容量、78.8%的令人印象深刻的倍率性能以及95.7%的可观寿命。对于DSNFSeHS电极也观察到了相当的性能，其容量为258.4 mA h g-1/930.25 C g-1，倍率性能为75.5%，寿命为90.9%。由这两个电极制造的高效非对称装置（MSNMSeHS||DSNFSeHS）展现出优异的电化学特性（在900.8 W kg-1时能量密度约为112.6 W h kg-1）以及约94.4%的理想寿命。
