Template-free synthesis of β-NiS ball-in-ball microspheres for a high-performance asymmetrical supercapacitor
作者:Qin Hu、Shengtao Zhang、Wenpo Li、Jiangyu Hao、Lulu Zhang、Lijin Yan、Xuefeng Zou
DOI:10.1039/d1dt01687c
日期:——
In this work, single-component β-NiS ball-in-ball microspheres has been easily obtained by the unique use of 2-mercaptopropionic acid (2-MPA) as the sulfur source and ethanol as the solvent.
2D β-NiS as electron harvester anchors on 2D ZnIn2S4 for boosting photocatalytic hydrogen production
作者:Liang Ding、Di Li、Hongqiang Shen、Xiaolei Qiao、Hao Shen、Weidong Shi
DOI:10.1016/j.jallcom.2020.157328
日期:2021.2
Consequently, the NiS/ZnIn2S4 heterojunction presents extraordinarily highly efficient photocatalytichydrogenproduction, and excellent stability. The hydrogenproduction of the optimal NiS/ZnIn2S4 reaches to 13.57 mmol g−1 h−1, to be approximately 10 times that of pure ZnIn2S4 nanosheets. More importantly, the H2 generation rate of the 2D/2D NiS/ZnIn2S4 heterojunction is higher than that of Pt/ZnIn2S4
Ni3S4, CoNi2S4, and NiCo2S4 thiospinels were synthesized by a pH-controlled homogeneous precipitation method at 70 °C with metal-chlorides and thioacetamide in the ammonium chloride–ammonia buffer solutions adjusted to pH = 9.9.
Shell-strengthened hollow architecture of NiCo2S4 carved through an in-situ reaction Ostwald Ripening mechanism with significantly enhanced electrochemical performance
作者:Xiaoxiao Wang、Jing Li、Yuanyuan Liu、Meiri Wang、Yuchao Zhao、Hongtao Cui
DOI:10.1016/j.jallcom.2021.161632
日期:2021.12
presents a shell-strengthened hollow structure, satisfying the as-mentioned two requirements: (1) the rich pores in shell and hollow structure plus structural cobalt ions lead to the excellent high-rate performance of NiCo2S4; (2) the dense particulate layer in shell with additional mechanical strength prolongs the cycling life of NiCo2S4. Consequently, the asymmetrical supercapacitors assembled with
对于法拉第超级电容器,镍基材料等一些电池类电极材料因其较高的理论容量而备受关注。然而,由于其个体化要求与材料微观结构的矛盾,这些材料很难同时达到满意的高倍率性能和循环寿命。在这项工作中,我们遵循原位反应 Ostwald 成熟机制,在水热条件下构建了 NiCo 2 S 4的中空结构。制备的 NiCo 2 S 4呈现壳强化的空心结构,满足上述两个要求:(1)壳和空心结构中丰富的孔隙加上结构性钴离子导致NiCo 2 S 4优异的高倍率性能;(2)壳中致密的颗粒层具有额外的机械强度,延长了NiCo 2 S 4的循环寿命。因此,以NiCo 2 S 4为正极材料组装的非对称超级电容器显示出高能量和功率密度以及优异的循环稳定性。
Synthesis of Nickel Sulfide by Homogeneous Precipitation from Acidic Solutions of Thioacetamide
作者:Jason Grau、Mufit Akinc
DOI:10.1111/j.1151-2916.1996.tb08550.x
日期:1996.4
Nickel sulflde powders were precipitated by utilizing the thermal decomposition of thioacetamide in acidic aqueous solutions. Precipitation was induced by a direct reaction between thioacetamide and nickel at 70° and 80°C with thioacetamide concentrations of 0.80M. Precipitation was induced by reaction of sulfide ions with nickel at 90°C and at low pH. Direct reaction products were amorphous and contained