Pigment & Resin Technology
·
2022
·Vol. 53
·期 3
·358-368
·
IF 1.126
Xiaoping Lin,Xiaoyan Li,Jiming Yao,Xianghong Li,Jianlin Xu
Purpose To develop electrode materials for supercapacitor with superior electrochemical performance and simple preparation process, the purpose of this study is to prepare flexible CC/NiS/a-NiS electrodes with self-supporting structure by loading hydrothermally synthesized a-NiS particles along with nano-NiS on carbon cloth by electroplating method. Design/methodology/approach The effects of current densities, temperatures and pH values on the loading amount and uniformity of the active substances during the plating process were investigated on the basis of optimization of surface morphology, crystalline structure and electrochemical evaluation as the cyclic voltammetry curves, constant current charge–discharge curves and AC impedance. Findings The a-NiS particles on CC/NiS/a-NiS were mostly covered by the plated nano-NiS, which behaved as a bulge and provided a larger specific surface area. The CC/NiS/a-NiS electrode prepared with the optimized parameter exhibited a specific capacitance of 115.13 F/g at a current density of 1 A/g and a Coulomb efficiency of 84% at 5 A/g, which is superior to that of CC/NiS electrode prepared by electroplating at a current density of 10 mA/cm 2 , a temperature of 55°C and a pH of 4, demonstrating its fast charge response of the electrode and potential application in wearable electronics. Originality/value This study provides an integrated solution for the development of specifically structured NiS-based electrode for supercapacitor with simple process, low cost and high electrochemical charge/discharge performance, and the simple and easy-to-use method is also applicable to other electrochemically active composites.
研究领域:
材料科学
·
电化学
·
储能
·
纳米技术
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Zhengquan Jiang,Chenglong Wang,Wenwei Ma,Ming Li,Laigui Yu,Shengmao Zhang,Weihua Li
Friction and wear remain formidable challenges for mechanical components in modern industrial applications. Traditional lubricants rely on a combination of additives that synergistically enhance performance but often undergo thermal degradation at increased temperatures, causing mechanical lubrication failure. Trinickel disulfide (Ni3S2) nanoparticles have emerged as promising candidates owing to their excellent tribological properties, chemical stability, and resilience at high temperatures. Compared with nonmagnetic nanoparticles, the magnetic properties of Ni3S2 nanoparticles can quickly form a protective film on the metal surface and reduce mechanical damage. Nevertheless, the conventional synthesis route of Ni3S2 requires high-temperature conditions and the release of toxic gases, resulting in environmental pollution. To address these limitations, we synthesized oleylamine-modified magnetic Ni3S2 nanoparticles (OA-Ni3S2 NPs) through a liquid-phase approach under mild conditions. Transmission electron microscopy (TEM) analysis indicated that OA-Ni3S2 NPs had an average particle size of ∼40 nm. Tribological evaluation in poly-α-olefin-6 (PAO6) base oil, conducted using a four-ball tribometer, revealed that OA-Ni3S2 NPs reduced the coefficient of friction (COF) by 31% and wear scar diameter (WSD) by 40% compared to pristine PAO6, underscoring their exceptional friction-reducing and antiwear performance, while mechanistic studies further clarified the sliding behavior of the nanoparticles at the friction interface. These findings underscore the potential of OA-Ni3S2 NPs as sustainable lubricant additives and provide a promising foundation for their deployment in high-temperature industrial systems.
研究领域:
纳米材料
·
摩擦学
·
润滑工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2019
·Vol. 9
·期 5
·458
·
IF 3.444
Lihong Xie,Dengke Zhao,Jiale Dai,Zexing Wu,Ligui Li
Exploring efficient non-precious metal based electrocatalysts for the oxygen evolution reaction (OER) is a prerequisite to implement the widespread application of a water electrolyzer and metal-air batteries. Herein, Fe-doped NiS2nanoparticles on a carbon matrix (Fe-NiS2/C) are facilely prepared via a two-step solvothermal process, where Ni-containing metal organic frameworks (Ni-MOFs) are vulcanized in situ and carbonized by a solvothermal method to form abundant NiS2nanoparticles homogeneously distributed on a carbon matrix (NiS2/C), followed by doping with ferric ions via a similar solvothermal treatment. The resulting Fe-NiS2/C nanoparticle composites show a rougher surface than the NiS2/C parent, likely due to the formation of more structural defects after ferric ion doping, which maximizes the exposure of active sites. Moreover, ferric ion doping can also regulate the surface electronic state to reduce the activation energy barrier for OER on NiS2/C sample. With these merits, the best sample Fe-NiS2/C-30 only requires a potential of +1.486 V (vs. RHE) to reach an OER current density of 10 mA cm−2and can retain 96.85% of its initial current after continuous working for about 10 h in 1.0 M KOH aqueous solution, along with a small Tafel slope of 45.66 mV/dec, outperforming a commercial RuO2catalyst. The results in this work enrich the method to tailor the catalytic activity of transition metal sulfides for electrochemical energy technologies.Keywords:oxygen evolution reaction;electrocatalyst;nickel disulfide;doping;activity
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Wenrui Zhu,Zhilan Du,Dashuang Wang,Yan Liao,Fanbo Gong,Tuo Ping,Pingan Yang,Yi Hou,Tiancai Zhang,Jinsong Rao,Yuxin Zhang,Xiaoying Liu
This study presents a novel approach to designing high-performance, lightweight electromagnetic wave (EMW) absorption materials by sulfurizing three-dimensional biotemplate diatomite (De) through different sulfurization methods. The composite materials, consisting of different phases of sulfurized nickel and diatomite, were prepared using three methods. The results show that by controlling the surface morphology, crystal structure, and defect sites, the materials’ EMW absorption properties can be significantly enhanced. Specifically, the NixS6@De composite obtained through the hydrothermal method exhibited an effective absorption bandwidth (EAB) of 9.86 GHz at a matching thickness of 1.44 mm, while the Ni3S2@De composite prepared through the calcination method achieved an EAB of 9.71 GHz at a thickness of 1.71 mm. This study offers a strategy for the development of multicomponent nanocomposite EMW absorption materials with superior performance and lightweight characteristics.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Lu Chen,Junrong Zeng,Mengwei Guo,Ruichang Xue,Rongrong Deng,Qibo Zhang
Herein, self-supported Ni 3 S 2 spherical clusters packed with well-defined nanosheets developed on Ni foam (NF) were rationally fabricated via a novel low-temperature solvothermal sulfurization approach in a choline chloride/ethylene glycol (Ethaline)-based deep eutectic solvent (DES). The DES-based sulfurization process drove an interesting time-dependent surface restructuring and phase transformation that occurred on the Ni substrate, leading to the in-situ formation of a Ni 3 S 2 layer with controllable architecture. Pre-deposition of a Ni interlayer on the NF substrate provides more assessable electrochemical surface area and reaction sites, which favored fast crystal nucleation/growth and structural reconstruction. Benefiting from the integrated design and unique 3D interdigital architecture, the optimized Ni 3 S 2 _5/Ni/NF with a sulfurization time of 5 h exhibits a high specific capacitance (specific capacity) of 5,633 mF cm −2 (860.6 μAh cm −2 ) at a current density of 10 mA cm −2 , and maintains 87.7% of initial specific capacitance after 1,000 charge–discharge process at a current density of 20 mA cm −2 . This facile DES-driven solvothermal sulfurization strategy for the fabrication of integrated metal sulfides-based electrode materials could be promising for practical applications in high-performance electrochemical devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 71
·e202202410
·
IF 5.02
Yong Gao,Dani Zhang,Jingjing Li,Hao Gong,Cheng Jiang,Hairong Xue,Xianli Huang,Tao Wang,Jianping He
Graphical The P doped MoS 2 @Ni 3 S 2 nanorods array with core/shell structure was prepared through successive sulfuration and phosphorization strategies, which exhibits close catalytic activity to Pt/C, the overpotential is only 290 mV at 250 mA cm −2 . Electrocatalysis is the most promising strategy to generate clean energy H 2 , and the development of catalysts with excellent hydrogen evolution reaction (HER) performance at high current density that can resist strong alkaline and acidic electrolyte environment is of great significance for practical industrial application. Therefore, a P doped MoS 2 @Ni 3 S 2 nanorods array (named P-NiMoS) was successfully synthesized through successive sulfuration and phosphorization. P-NiMoS presents a core/shell structure with a heterojunction between MoS 2 (shell) and Ni 3 S 2 (core). Furthermore, the doping of P modulates the electronic structure of the P-NiMoS; the electrons transfer from the t 2g orbital of Ni element to the e g empty orbital of Mo element through the Ni−S−Mo bond at the Ni 3 S 2 and MoS 2 heterojunction, facilitating the hydrogen evolution reaction. As a result, P-NiMoS exhibits excellent HER activity; the overpotential is 290 mV at high current density of 250 mA cm −2 in alkaline electrolyte, which is close to Pt/C (282 mV@250 mA cm −2 ), and P-NiMoS can stably evolve hydrogen for 48 h.
研究领域:
材料科学
·
电催化
·
能源化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 19
·3588-3597
·
IF 5.958
Yuqi Liu,Yue Yu,Zhongcheng Mu,Yuanhong Wang,Usman Ali,Shengyu Jing,Shuangxi Xing
The design and synthesis of non-precious metal-based bifunctional electrocatalysts with low cost and high performance for hydrogen and oxygen evolution in water are of great importance for renewable energy. Transition metal sulfides have attracted extensive interest owing to their easily adjustable electronic structures and rich chemical properties. Herein, the growth of MoS2–Ni3S2 on a nickel foam (MoS2–Ni3S2/NF) surface is investigated in the presence of urea, which can tune the morphology, surface electronic state and surface hydroxyl content of the product. The MoS2–Ni3S2/NF with optimal urea content shows remarkable electrocatalytic activity to hydrogen and oxygen evolution reactions with the corresponding overpotential at 100 mA cm−2 of only 181 mV and 355 mV, respectively. Upon using the product as a bifunctional electrocatalyst for overall water splitting, an overvoltage as low as 1.56 V is required and the stability is excellent for more than 80 000 s at 10 mA cm−2.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Keyu Tao,Yun Gong,Qingfeng Zhou,Jianhua Lin
Co-Mo-O (Co 1.2 MoO 4.2 ·1.3H 2 O)/Ni 3 S 2 nanosheet arrays were in-situ grown directly on Ni foam (NF) by a facile two-step hydrothermal reaction , in which the untrathin Co-Mo-O nanosheets are connected to each other into a three-dimensional (3D) porous hierarchical architecture with Ni 3 S 2 entrapped on the underneath Ni support. The resulting Co-Mo-O/Ni 3 S 2 /NF exhibits an excellent electrocatalytic activity for oxygen evolution reaction (OER) in KOH solution, which yields a 50 mA cm −2 of OER current density at an overpotential of 0.29 V, outperforming the state-of-the-art noble RuO 2 (η 50 = 0.42 V), Co-Mo-O/NF (η 50 = 0.33 V) and Ni 3 S 2 /NF (η 50 = 0.31 V). And it demonstrates a high specific capacity of 340 mAh g −1 at 2 mA cm −2 with good capability (82.1% of the retention at 32 mA cm −2 ) in basic solution when used as supercapacitor electrode, which is superior to those of Co-Mo-O/NF (183 mAh g −1 ) and Ni 3 S 2 /NF (70 mAh g −1 ). The outstanding electrochemical performance of Co-Mo-O/Ni 3 S 2 /NF is associated with the synergistic effect of the individual components as well as the nanosheets directly grown on Ni conducting support with more active sites exposed. Furthermore, Co-Mo-O/Ni 3 S 2 /NF displays good durability in 12 h-electrolysis experiment for OER and 10000 charge-discharge cycles. It is expected to benefit from Ni 3 S 2 entrapped by the protective layer of 3D porous Co-Mo-O nanosheet arrays, which not only can provide channel for electrolyte ion to pass through, but also improve the stability of Ni 3 S 2 . In addition, the fabricated Co-Mo-O/Ni 3 S 2 /NF//Activated carbon (AC) asymmetrical supercapacitor shows an ultra-high energy density of 57.9 Wh kg −1 at a power density of 1.1 kW kg −1 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 39
·19201-19209
·
IF 9.931
Guoqiang Liu,Zhongti Sun,Xian Zhang,Haojie Wang,Guozhong Wang,Xiaojun Wu,Haimin Zhang,Huijun Zhao
Electrocatalytic water splitting has been widely accepted as an environmentally friendly approach to generate clean H2. However, the sluggish oxidation half reaction, namely, the oxygen evolution reaction (OER), usually requires a high overpotential, which is the obstacle to high-efficiency overall water splitting to generate H2. Herein, we report the preparation of ultrathin nanosheet array Ni3S2 with a 9–14 nm nanosheet thickness grown directly on a commercial Ni foam substrate (Ni3S2/NF) by in situ vapor-phase hydrothermal (VPH) transformation of the nanosheet array structure Ni(OH)2/NF precursor. As a multifunctional electrocatalyst, the as-fabricated Ni3S2/NF-2 (VPH time of 2 h) displays excellent electrocatalytic activities toward the hydrazine oxidation reaction (HzOR) with a potential of 0.415 V (vs. RHE) to deliver a current density of 100 mA cm−2, an OER with an overpotential of 425 mV obtaining the same current density, and a hydrogen evolution reaction (HER) with an onset potential of −0.05 V (vs. RHE) in 1.0 M KOH media. A two-electrode system is therefore constructed using Ni3S2/NF-2 as both the anode and cathode, capable of achieving 100 mA cm−2 at 0.867 V in 1.0 M KOH with 0.2 M hydrazine. Density functional theory (DFT) calculations reveal that the adsorption of N2H4 molecules on the Ni3S2 (110) is more thermodynamically favourable than H2O, thus contributing to the high HzOR activity.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Ruizhi Zhang,Zhaoqiang Zhu,Jiahao Lin,Kefu Zhang,Nan Li,Chongjun Zhao
Non-noble-metal based catalysts for overall water splitting have attracted widespread attention. Herein, we report a Fe(II) hydrolysis reaction assisted in-situ etching and growth method for the design of Fe 2 O 3 nanoparticles-anchored ultrathin Ni(OH) 2 nanosheets composites on nickel foam (Fe 2 O 3 /Ni(OH) 2 /NF), followed by solvothermal sulfidation conversion into FeS/NiS/NF electrode. As-prepared FeS/NiS/NF electrode possesses low overpotentials of 203 mV and 144 mV to achieve a current density of 10 mA cm −2 in 1.0 M KOH for OER and HER, respectively. FeS/NiS/NF directly serves as both anode and cathode to assemble a two-electrode water electrolyzer, which only requires a voltage of 1.618 V to afford water-splitting current density of 10 mA cm −2 in 1.0 M KOH. Additionally, this water splitting device can also be driven by using photovoltaic solar panels. This work provides a new strategy to tailor the components and structure of the catalyst and thus to improve electrocatalytic performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Congli Wang,Hongfang Jiu,Lixin Zhang,Ruijia Xu,Sicong Che,Zhixin Guo,Yuxin Han,Jinfeng Ma,Hui Li,Fengbo Guo
Exploring novel electrode materials is the key to developing attractive lithium-ion batteries (LIBs). Hence, we successfully synthesized NiS@C/Ti 3 C 2 by in situ growth-sulfuration-pyrolysis strategies. As LIBs anode, its initial discharge capacity of NiS@C/Ti 3 C 2 was 1509 mAh g −1 and its discharge capacity was 301.2 mAh g −1 at 1 A g −1 . Most importantly, when the current density recovered to 0.03 A g −1 continuing 20 cycles and maintained excellent capacity of 864.6 mAh g −1 . Notably, its capacity was 649.9 mAh g −1 after 700 cycles at 0.5 A g −1 . Such extraordinary performances are mainly attributed to (1) carbon matrix can improve conductivity of composite material, effectively buffer volume expansion of material during cycles process, and prevent structure collapse. (2) the hollow structure produced by sulfuration, porous carbon matrix and the gaps among Ti 3 C 2 nanosheets are conducive to the penetration of electrolytes. They provide abundant buffer space for volume expansion during Li + embedding/stripping process, which effectively alleviates structure collapse and electrode crushing. (3) Ti 3 C 2 nanosheets as high-conductive 2D substrate not only offer fast diffusion channels but also alleviate structure collapse of NiS@C. More importantly, this unique structure can alleviate restacking of Ti 3 C 2 and provide affluent active sites, thus endowing material with improved electrical conductivity . Our work provides insightful insights into the design of transition metal sulfides (TMSs) anchored at Ti 3 C 2 nanosheets as LIBs anode.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 15
·12026-12040
·
IF 2.22
Mao Min,Xu Jing,Li Jingjiao,Zhao Sheng,Li Xuanhao
It was the constant pursuit of researchers to explore catalysts with higher catalytic activity, and the use of co-catalysts to modify the performance of photocatalytic materials had a significant effect on charge separation. In this paper, the non-precious metal NiS-modified ZnCo 2 O 4 composite catalytic material prepared by hydrothermal method had high-efficiency catalytic performance. When the weight ratio of NiS to ZnCo 2 O 4 was 12%, the optimal catalytic activity is 3.57 mmol g −1 h −1 , which was more than twice that of ZnCo 2 O 4 . The presence of NiS not only improved the specific surface area of the catalyst and its ability to respond to light, but the close interface formed by the combination of the two monomer phases accelerated the transfer and the utilization of the photocharge on ZnCo 2 O 4 to NiS, thereby promoting the separation of electron holes and improving the photocatalytic activity of the catalyst. According to the research results, the mechanism of hydrogen production in the photocatalytic system was revealed. In this paper, NiS was used to modify the bimetallic oxide with cubic appearance, which provided a new strategy for the development of new photocatalysts.
研究领域:
材料科学
·
物理化学
·
纳米催化
·
能源化学
·
半导体光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）