LANGMUIR
·
2025
·
IF 3.9
Lijia She,Nan Li,Yi Wu,Xi Xi,Yafei Liu,Peng Shen,Gang Zhao,Jiangquan Ma
Designing efficient and stable oxygen evolution reaction (OER) catalysts is of great significance for hydrogen production technology through the electrolysis of water. Nickel sulfide (NixSy) has garnered considerable attention as an OER electrocatalyst owing to its high electrical conductivity and distinctive structure. Herein, Ni3S4–Yb2O3 on nickel foam electrocatalysts was fabricated through a hydrothermal synthesis approach to optimize the performance of Ni3S4. The incorporation of Yb2O3 induced charge redistribution within Ni3S4, expanded the active surface area, and enhanced the availability of active sites. Consequently, the Ni3S4–Yb2O3/NF catalyst demonstrates exceptional electrocatalytic performance in 1 M KOH, attaining a current density of 10 mA cm–2 at a minimal overpotential of 148 mV, along with an ultralow Tafel slope of 47.3 mV dec–1. In addition, we have confirmed that another reason for the improved performance is that Yb2O3, as an electron donor, can effectively regulate the defects of the Ni atoms. This work offers a feasible strategy for developing highly effective OER electrocatalysts in alkaline media.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Guangjun Liu,Fei Zhou,Keling Yan,Changfu Zhuang,Ying Wang,Ce Wang,Di Tian
Recently, MOF derived metal sulfides have drawn much attentions in supercapacitor filed, but its electrochemical performance is limited by their dispersion and stability. Herein, an in situ growth process was designed to fabricate Co 3 S 4 /Ni 3 S 4 on electrospun carbon nanofibers modified by ZIF-67, which offered robust structural stability , high redox activities, and enhanced the electron/ion diffusion kinetics. These merits lead to the specific capacitance of 617.78 F g −1 (specific capacity of 278.00 C g −1 ) at 0.5 A g −1 , good rate performance, as well as long cycling durability for CNF@CoNi(1:4)S in three electrode system . Its charge storage mechanism involved in a combined process of surface and diffusion contribution. In addition, an asymmetric supercapacitor (CNF@CoNi(1:4)S//AC) was constructed with the maximum energy density of 40.54 Wh kg −1 (1 A g −1 ) and the maximum power density of 6788.00 W kg −1 . This device also showed an outstanding cyclic performance (its specific capacitance could maintain the initial 115.10 % after 5000 cycles), and provided enough energy for the emission of LED. This work opens an avenue for designing MOF based or metal sulfides based functional materials .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Haoyu Huang,Xin Hu,Zhuoran Hou,Di Yang,Dan Xiang,Liwen Hu
The hydrogen is described as a clean and sustainable alternative to fossil fuels in numerous energy systems. Hydrolysis is an important method for high purity, high volume hydrogen production. In order to accelerate the kinetics of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media, it is essential to explore efficient catalysts. In this paper, the nanoscale self-supported Mn-NiS/Mn-Ni 3 S 4 composite catalysts was assembled on nickel foam. Benefiting from the lattice distortion and vacancy defects caused by the doping of Mn elements, the catalysts exposed an increasing number of electrochemical surfaces and effective active sites, showing impressive electrochemical performance with a HER overpotential of only 94.2 mV at 10 mA/cm 2 and an OER overpotential of only 253 mV to drive 50 mA/cm 2 . Applying as the bifunctional catalysts, the Mn-NiS/Mn-Ni 3 S 4 couple only achieved a low voltage of only 1.52 V to drive 10 mA/cm 2 . This paper provides new ideas and references for the rational design of high-performance sulfide catalysts with non-precious metal composites.
研究领域:
材料科学
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电化学
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Fei Zhou,Lanrui Yin,Changfu Zhuang,Ying Wang,Yimo Xiang,Di Tian
Recently, the development of transition metal sulfides as electrode materials in supercapacitors has been hindered by their slow reaction kinetics and insufficient stability. In this paper, a heterogeneous NiS 2 /Ni 3 S 4 composite of a small size was generated via a solvothermal process using Ni-MOF as a precursor. The heterogeneous NiS 2 /Ni 3 S 4 is conducive to the increase of redox sites and optimization of ion diffusion channels. Meanwhile, the small size of NiS 2 /Ni 3 S 4 improves the redox reaction kinetics between the electrochemically active material and electrolyte. These advantages resulted in S-Ni-MOF(1) with a high specific capacitance of 895.56 F g −1 (403.00 C g −1 ) at 0.5 A g −1 , as well as features of battery-type materials. In addition, a bamboo-derived active carbon (BBC) was prepared for the hybrid supercapacitor device (S-Ni-MOF(1)//BBC). The device possessed the largest energy density of 50.92 Wh kg − ¹ at the power density of 1,500 W kg −1 . After 10,000 charge/discharge processes, its specific capacitance reached 74.47% of its initial value. The connected devices supported the illumination of LEDs, demonstrating good application prospects. This work will offer novel references for designing heterogeneous sulfide and MOF derived nanomaterials.
研究领域:
材料科学
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能量存储与转换
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 37
·e02912
·
IF 2
Haoran Chang,Yanfei Zhang,Qin Li,Junjie Li,Mingchao Wang,Zewen Yu,Shuya Li,Qi Hao,Xiaoyong Ran,Yimeng Zhao
Transition metal sulfides are promising candidates for energy storage applications due to their rich Faradaic activity and high theoretical specific capacities. However, their practical performance is often hindered by intrinsically low electrical conductivity and degradation from prolonged cycling. In this study, a binder-free composite electrode was fabricated by directly growing NiS/Ni 3 S 4 nanosheet arrays onto thermally activated carbon cloth through a facile one-step hydrothermal method. The conductive and robust substrate facilitates efficient charge transport while maintaining structural integrity during operation. The optimized NiS/Ni 3 S 4 @TACC-10 electrode delivers a high specific capacity of 285 mAh g −1 at 2 A g −1 and retains 63.1% of its capacity at 10 A g −1 . The corresponding hybrid supercapacitor exhibits an impressive energy density of 97.4 Wh kg −1 and maintains 102.6% of its initial capacitance after 3000 cycles at 20 A g −1 . Moreover, three such devices connected in series successfully powered red LEDs for over 20 min, highlighting their potential for real-world energy storage applications. These results offer a scalable and effective strategy for the development of high-performance electrochemical energy storage systems. Graphical Hierarchical NiS/Ni 3 S 4 nanosheet arrays directly grown on thermally activated carbon cloth deliver high capacity, excellent rate capability, and long-term cycling stability, demonstrating strong potential for next-generation hybrid supercapacitors.
研究领域:
材料科学
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电化学
·
能源存储
·
纳米科技
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功能材料
·
先进储能技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）