Simple and affordable synthesis of a binder-free nickel-zinc sulfide electrode for high-performance supercapacitors

被引:6
作者
Heakal, F. El-Taib [1 ]
Elkholy, A. E. Ahmed [2 ]
Ahmed, S. Y. [3 ]
机构
[1] Cairo Univ, Fac Sci, Chem Dept, Giza 12613, Egypt
[2] Egyptian Petr Res Inst, Dept Anal & Evaluat, Cairo 11727, Egypt
[3] Ain Shams Univ, Fac Women Arts Sci & Educ, Chem Dept, Cairo 11757, Egypt
关键词
Nickel -zinc sulfide; SILAR method; Supercapacitor; Binder -free electrode; Pseudocapacitive behavior; CHARGE STORAGE; CONSTRUCTION; GRAPHENE; DESIGN;
D O I
10.1016/j.inoche.2024.112356
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Due to the increasing demand for renewable energy solutions, aqueous energy systems have emerged as promising and sustainable technologies. Nanostructured transition metal sulfides, renowned for their exceptional properties, are prime candidates for electrochemical supercapacitors. In this study, we present the synthesis of nickel -zinc sulfide (Ni-Zn-S) as a binder -free supercapacitor material using the affordable successive ionic layer adsorption and reaction simple technique. The active nanomaterial was directly deposited onto a 3D Ni foam current collector substrate, negating the need for a binder. The synergistic combination of Ni and Zn enhances the electrode capacitance. Various electrochemical techniques were used to evaluate the loaded active material as a binder -free supercapacitor electrode in a 6 M KOH electrolyte. Results indicate pseudocapacitive performance, achieving a high specific capacitance of 400F/g at 0.7 A/g. This material retains 97 % of its capacity, even after 2000 cycles, showcasing exceptional long-term cycling stability. These findings underscore the potential of the Ni-Zn-S electrode for delivering low-cost, high-performance supercapacitors.
引用
收藏
页数:8
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