Mane Sagar M, Wagh Komal S, Teli Aviraj M, Beknalkar Sonali A, Shin Jae Cheol, Lee Jaewoong
Department of Fiber System Engineering, Yeungnam University, 280 Dehak-Ro, Gyeongsan 38541, Gyeongbuk, Republic of Korea.
Independent Researcher, Gyeongsan 38544, Gyeongbuk, Republic of Korea.
Micromachines (Basel). 2024 Feb 7;15(2):251. doi: 10.3390/mi15020251.
To maximize the use of ZnS low-dimensional nanoparticles as high-performance supercapacitor electrodes, this work describes a simple one-pot synthesis method for producing a cluster of these particles. The ZnS nanoparticles fabricated in this work exhibit a cluster with unique low-dimensional (0D, 1D, and 2D) characteristics. Structural, morphological, and electrochemical investigations are all part of the thorough characterization of the produced materials. An X-ray diffraction pattern of clustered ZnS nanoparticles reflects the phase formation with highly stable cubic blende sphalerite polymorph. The confirmation of nanoparticle cluster formation featuring multiple low-dimensional nanostructures was achieved through field emission scanning electron microscopy (FE-SEM), while the internal structure was assessed using transmission electron microscopy (TEM). Systematically assessing the ZnS nanoparticles' electrochemical performance reveals their prospective qualities as supercapacitor electrode materials. The electrode assembled with this material on Ni foam demonstrates elevated specific capacitance (areal capacitance) values, reaching 716.8 F.g⁻ (2150.4 mF.cm) at a current density of 3 mA.cm⁻. Moreover, it reflects 69.1% capacitance retention with a four times increase in current density, i.e., 495.5 F.g (1486.56 mF.cm) capacitance was archived at 12 mA.cm with 100% Coulombic efficiency. Furthermore, the electrode exhibits prolonged cycling capability with 77.7% capacitance retention, as evidenced by its charge-discharge measurements sustained over 15,000 cycles at a current density of 25 mA cm⁻.
为了最大限度地将ZnS低维纳米颗粒用作高性能超级电容器电极，本工作描述了一种用于制备这些颗粒簇的简单一锅合成方法。本工作中制备的ZnS纳米颗粒呈现出具有独特低维（0D、1D和2D）特性的簇。结构、形态和电化学研究都是对所制备材料进行全面表征的一部分。簇状ZnS纳米颗粒的X射线衍射图谱反映了具有高度稳定的立方闪锌矿多晶型的相形成。通过场发射扫描电子显微镜（FE-SEM）确认了具有多种低维纳米结构的纳米颗粒簇的形成，同时使用透射电子显微镜（TEM）评估了内部结构。系统地评估ZnS纳米颗粒的电化学性能揭示了它们作为超级电容器电极材料的潜在品质。用这种材料在泡沫镍上组装的电极显示出较高的比电容（面积电容）值，在电流密度为3 mA·cm⁻时达到716.8 F·g⁻¹（2150.4 mF·cm⁻²）。此外，它在电流密度增加四倍时反映出69.1%的电容保持率，即在12 mA·cm⁻时达到495.5 F·g⁻¹（1486.56 mF·cm⁻²）的电容，库仑效率为100%。此外，该电极表现出延长的循环能力，电容保持率为77.7%，这在其在25 mA·cm⁻的电流密度下进行超过15000次循环的充放电测量中得到了证明。
