ChemElectroChem
·
2022
·Vol. 9
·期 11
·e202200135
·
IF 4.782
Feng Ning,Xin Gao,Fei Yao,Hengwei Zhang,Yanfei Yu,Yanqiu Xie,Hongyan Yue
Graphical Cone to power: NiCo 2 S 4 nanocone arrays (NCS NCAs) are grown on the surface of phosphorus-doped hollow carbon nanospheres (PHCS) by using a two-step hydrothermal method. The NCS NCAs/PHCS electrode shows a high specific capacity of 761 C ⋅ g −1 at 1 A ⋅ g −1 , exhibits an excellent cycle stability, and shows a remarkable energy density of 46.5 Wh ⋅ kg −1 at the power density of 777.5 W ⋅ kg −1 A soft template and hydrothermal method are used to prepare NiCo 2 S 4 nanocone arrays/P-doped hollow carbon nanospheres (NCS NCAs/PHCS). PHCS is loaded with a large number of vertically grown NCS NCAs on the surface due to phosphorus doping. PHCS is an excellent conductive base material and it can effectively alleviate the structural collapse of NCS NCAs during charging and discharging because of its hollow structure. NCS NCAs with lots of active sites provide fast diffusion channels and excellent electron transmission channels. The synergistic effect between NCS NCAs and PHCS causes the electrode material to show excellent electrochemical properties, such as high specific capacitance (761 C ⋅ g −1 at 1 A ⋅ g −1 ) and excellent cycle stability (the capacitance retention rate is 88.6 % after 10, 000 cycles at 20 A ⋅ g −1 ). The NCS NCAs/PHCS composite is also assembled with PHCS as an asymmetric supercapacitor. It shows a remarkable energy density of 46.5 Wh ⋅ kg −1 at the power density of 777.5 W ⋅ kg −1 . These findings confirm that the NCS NCAs/PHCS composite is an excellent electrode material of supercapacitors.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
You Fu,Xilong Liu,Leiyun Han,Zheng Xie,Huaxia Chen,Yingjie Hua,Chongtai Wang
Aim to improve the capacitive performance of the NiCo 2 S 4 -based electrode materials, a novel composite material with a homogeneous and heteromorphic construction, h -NiCo 2 S 4 / u -NiCo 2 S 4 /NF, was successfully prepared through layer-by-layer growth in a hydrothermal process using urea and hexamethylenetetramine as alkali source in this work. This material presents a specific capacity high up to 1245.3 C g −1 (345.9 mAh g −1 ) at the current density of 2 A g −1 in a 6 M KOH electrolyte solution. Moreover, a 74.6 % of the initial specific capacity is still retained when the current density increases from 2 to 10 A g −1 , showing a relatively good rate capability. Especially, an 84.0 % of capacity retention rate can be obtained after it suffers from 7000 charging-discharging cycles at 50 mA cm −2 (9.2 A g −1 ), exhibiting a good cycling stability. Using it as the positive electrode material to assemble an asymmetrical supercapacitive device with a home-made porous carbon (PC) as the negative electrode material, an energy density high up to 48.4 Wh kg −1 at 1060.6 W kg −1 and a 63.2 % of capacity retention rate at 10,000 charging-discharging cycles can be achieved, superior to many NiCo 2 S 4 -based asymmetrical supercapacitive devices reported so far.
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 COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xiaobing Xu,Xueming Liu,Wei Zhong,Lei Zhang,Guangxiang Liu,Youwei Du
Metal-organic frameworks (MOFs), serving as precursors or templated to construct nanomaterials , which have gained great attentions in the field of electrocatalysis . However, their applications still remain some challenges due to poor conductivity and easy agglomeration. In this work, the MOFs-derived NiCo 2 S 4 @NiCo 2 O 4 deposited on reduced Graphene Oxide (rGO) surface is designed by using a facile hydrothermal procedure. Attribute to the enlarged active surface area of the nanostructure and the strong synergistic effect between NiCo 2 S 4 and NiCo 2 O 4 , as well as the excellent conductivity of rGO. The NiCo 2 S 4 @NiCo 2 O 4 -rGO catalyst displays ultrahigh hydrogen evolution reaction (HER) property and excellent stability, only need an overpotential of η 10 = 95 mV to attain 10 mA cm −2 and deliver a small Tafel slope of b = 52 mV dec −1 in 1 M KOH. This work can provide a window to construct and develop new noble metal-free HER catalysts base on Ni-MOFs served as precursors.
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
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Xuebin Lu,Zhengya Gong,Zhihao Yu,Jian Xiong,Gaixiu Yang,Mengyan Guo,Yuxin Zhang,Yiming Li
Supercapacitors as one of the new energy storage devices have attracted much attention from researchers. The design and preparation of new electrode materials with high conductivity and energy density has become a frontier and key issue in the research of supercapacitor performance improvement. In addition, flow capacitor deionization (FCDI) relying on the working principle of supercapacitors is a promising technology for desalination and has received crucial attention. NiCo 2 S 4 (NCS) is a promising pseudocapacitive material with high electrical conductivity and ideal stability. In this study, sea urchin-like NiCo 2 S 4 electrode materials (CC@NCS) grown in situ on crab shell carbon (CC) were prepared by a simple molten salt-assisted hydrothermal two-step method. The composite successfully combined the properties of CC and NiCo 2 S 4 . The prepared material exhibited excellent electrochemical properties and energy storage performance. In the three-electrode system, the specific capacitance is up to 692.4 F/g at a current density of 0.5 A/g. Asymmetric supercapacitors assembled with CC as the negative electrode, CC@NCS as the positive electrode, and 3 M KOH as the electrolyte obtained high specific capacitance (0.5 A/g, 163.6 F/g) and high energy density (305.16 W/kg, 8.18 Wh/kg). The device also showed excellent cycling performance in the long cycle test (88.65 % retention after 5000 cycles). In addition, the FCDI device with this material as the flow electrode achieved a final conductivity of 15.16 μS/cm by electrosorption of a 1000 mg/L NaCl solution at a constant pressure of 1.2 V for 60 min along with an impressive average salt removal rate (0.0621 mg/cm 2 ·min −1 ) and charge efficiency value (90.79 %), and a low energy consumption value (0.02 kWh/mol). What's more, it also exhibited excellent desalination properties. This indicates that the composite is a promising active material for energy storage and desalination.
研究领域:
材料科学
·
能源存储
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Wei Li,Yuxin Li,Liaoyuan An,Zhuojun Zou,Ziyang Cong,Miaomiao Liu,Junyu Yang,Shangru Zhai,Qingda An,Kai Wang,Yao Tong
The scientific community has been captivated by flexible all-solid-state supercapacitors , which can meet the growing demand for portable electronic devices. In this study, a novel MXene/NiCo 2 S 4 (MNCS) composite material was synthesized via the hydrothermal method , with NiCo 2 S 4 uniformly distributed on the surface or within the interlayers of MXene . The aim of this study was to enhance energy storage applications by developing a positive electrode material using a composite of MNCS. The architecture of the composite was carefully designed to prevent the stacking of MXene and the accumulation of NiCo 2 S 4 nanoparticles , effectively suppressing these issues. It is worth noting that when utilized in a three-electrode system, the MNCS electrode demonstrates outstanding electrochemical performance. Specifically, at a current density of 1 A g −1 , the electrode exhibits a specific capacity of 2675 F g −1 (equivalent to 1070 C g −1 ). Furthermore, even after undergoing 10,000 cycles of charging and discharging, the electrode retains an impressive 96.51 % of its initial capacity. These results clearly indicate that the exceptional performance observed in this supercapacitor can be attributed to the synergistic collaboration between NiCo 2 S 4 nanoparticles and MXene nanosheets which significantly enhances charge transfer during both charging and discharging processes. Moreover, we synthesized MNCS composites for use as positive electrodes in asymmetric flexible solid-state supercapacitors while employing activated carbon (AC) as negative electrodes. The resulting device exhibits high specific capacitance (256 F g −1 ) and impressive energy density (61 Wh kg −1 ) at a power density of 763 W kg −1 under a large voltage window (1.7 V) and current density (1 A g −1 ). Additionally, favorable cycling stability is observed with minimal capacitance variation even under various bending deformations. This study presents an innovative approach for developing composite materials with superior electrochemical properties and flexible devices with high energy density and power density.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shanwu Yu,Rui Liu,Ruiqi Ma,Qitao Zhou,Yifan Dong,Xiaoding Lou,Jing Pan,Fan Xia
The hydrogen evolution reaction (HER) happens at the interface between the electrolyte and the electrocatalysts . Thus, the outer surface of electrocatalysts is regarded as the most important towards the catalytic performance, considering its direct contact with the electrolyte. However, the interior part of catalysts could also have an influence on the HER performances. Herein, the HER catalytic performances of MoS 2 nanosheets are proven to be enhanced by the interior NiCo 2 S 4 nanotube skeletons, although the interior skeletons are unaccessible for the electrolyte during the HER process. The reasons may lie in the optimized electronic transport properties and much increased amount as well as intrinsic activity of active sites. The theoretical calculations and experimental results suggest enhanced adsorption of H* and accelerated Heyrovsky step of the HER process for the NiCo 2 S 4 supported MoS 2 , which may be the reason of the improved intrinsic activity of the active sites. Moreover, calculation of the densities of states suggests the metallic nature of the heterostructures , which could result in the excellent electronic transport performance for NiCo 2 S 4 supported MoS 2 . In addition, the enhancement has a close relationship with the amount of the loading MoS 2 . Besides, compared with bared NiCo 2 S 4 nanotubes, the MoS 2 loaded NiCo 2 S 4 nanostructures also exhibit better HER catalytic activity as well as improved catalytic stability. This work offers an effective and facile way to design and prepare efficient non-precious metal HER catalysts.
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
·
2025
·
IF 6.3
Juan Xia,Chengying Yang,Mengdie Wang,Chenchen Liu,Dan Zheng,Ping Han,Xu Sun,Hanlin Wu,Qi Wang
NiCo 2 S 4 has garnered significant attention in biochemical analysis as an enzyme mimic due to its peroxidase-like activity. However, its catalytic properties have not been fully explored, limiting its application, particularly in biomedical diagnostics for low-abundance biomolecules. The catalytic activity of nanozymes is closely linked to their interface structure, and sulfur vacancies (SVs) have shown considerable promise in enhancing nanozyme activity. In this work, we synthesized SVs-NiCo 2 S 4 with a flower-like structure and NiCo 2 S 4 with a sphere-like structure with varying SV concentrations by modulating the reaction solvent, utilizing the NiCo-glycerate metal-organic framework as a template. The SVs-NiCo 2 S 4 demonstrated a remarkable catalytic efficiency of 3.85 times higher than NiCo 2 S 4 with fewer SVs. This nanozyme effectively facilitated the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in H 2 O 2 , leading to a strong color response. Density functional theory (DFT) calculations and hydroxyl radicals (·OH) detection confirmed that the enhanced peroxidase-mimicking activity of SVs-NiCo 2 S 4 was attributed to its efficient adsorption of H 2 O 2 and subsequent decomposition into ·OH on the SVs sites of SVs-NiCo 2 S 4 . Based on these findings, we developed an enhanced colorimetric detection method for glutathione (GSH) utilizing the peroxidase-mimicking properties of SVs-NiCo 2 S 4 . Compared to NiCo 2 S 4 , SVs-NiCo 2 S 4 exhibited greater sensitivity for GSH detection, with a linear range spanning six orders of magnitude from 5 nM to 50 nM and 70 nM to 130 μM, alongside a detection limit of 1.55 nM. A deeper understanding of the mechanisms underlying the SVs can provide valuable insights for developing high-performance nanozymes and biosensors, thereby expanding the potential applications of NiCo 2 S 4 in biosensing and medical diagnostics.
研究领域:
生物医学诊断
·
纳米酶研究
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 14
·13462-13473
·
IF 2.195
Zhan Jiang,Shan Lina,Sui Yanwei,Qi Jiqiu,Wei Fuxiang,He Yezeng,Meng Qingkun,Sun Zhi,Liu Jinlong
Flexible electrodes for preparing core–shell structures are receiving increasing attention. A composite electrode material with NiCo 2 S 4 as the core and Ni 3 S 2 as the shell was successfully synthesized by hydrothermal synthesis and electrodeposition method. The prepared flexible NiCo 2 S 4 @Ni 3 S 2 core/shell nanorod array has higher electrochemical performance, with specific capacitance of 5.714 F cm −2 at 2 mA cm −2 and excellent cycle stability. In addition, the prepared flexible hybrid supercapacitor has been assembled with NiCo 2 S 4 @Ni 3 S 2 as the positive electrode and Fe 2 O 3 -rGO as the negative electrode, delivering an energy density of 5.9 mWh cm −3 at 171 mW cm −3 . These results make the NiCo 2 S 4 @Ni 3 S 2 a high-performance supercapacitor application candidate.
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
·
2023
·Vol. 34
·期 7
·1-12
·
IF 2.8
Su Zhen-Hong,Zhang Xiao-Fei,Shi Da-Wei,Zhang Xiao-Lei
Aim at developing electrode materials with prominent electrochemical performances for supercapacitor application, flower-like hierarchical nanostructure NiCo 2 S 4 powders (denoted as NCS-1) were synthesized by a facile one-step solvothermal method using the chelating agent of urea. The phase structure, particle morphology, specific surface area, and pore size distribution were examined, as well as the electrochemical properties of the electrodes prepared from the NiCo 2 S 4 powders. In order to tentatively explore the formation mechanism, NiCo 2 S 4 powders (denoted as NCS-2) were also prepared by the same method without urea. Meanwhile, the effect of urea on the structure and electrochemical performances was investigated. The results indicated that the chelating agent of urea played a significant role, coordinating with metal ions initially and releasing them slowly at elevating temperatures to form pure NiCo 2 S 4 compound. The NCS-1 electrodes exhibited a specific capacitance of 2339 F/g under a current density of 1 A/g and a capacitance retention of 56% after 5000 charge–discharge cycles measured at 20 A/g. The excellent electrochemical performances demonstrate that the flower-like NiCo 2 S 4 is a promising candidate for supercapacitor electrode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Yongkun Liu,Guohua Jiang,Shiqing Sun,Bin Xu,Junyi Zhou,Yang Zhang,Juming Yao
Flexible supercapacitors with both high energy and high power densities are critical for flexible electronics. In this paper, hybrid flexible carbon nanofibers decorated with NiCo 2 S 4 nanoparticles are successfully prepared by combination of electrospinning, carbonization and hydrothermal treatments . The obtained hybrid carbon nanofibers display remarkable specific capacitance (527.8 F g −1 at the current density of 0.2 A g −1 and 622.5 F g −1 at 2 mV s −1 ), good rate capability (310.5 F g −1 at 4.0 A g −1 ) and excellent cycle stability (retaining 90.0% after 3000 cycles). The flexible asymmetric supercapacitors based on carbon nanofibers decorated with NiCo 2 S 4 and porous carbon nanofibers coated with activated charcoal are fabricated. The combined unique properties of each of these components enable highly flexible and mechanically strong films that can serve as electrodes directly without using any current collectors or binders. The fabricated device shows an energy density of 32.1 Wh kg −1 at power density of 67.6 W kg −1 and cycle stability retaining 88.5% after 1500 cycles at 1.0 A g −1 . Therefore, the novel flexible asymmetric device with perfect flexibility and stability can be applied as one of the most promising power supplies.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xingyue Wu,Yiping Qiu,Wenrong Cai,Junyao Li,Datong Wu,Laidi Xu,Yong Kong
Melamine foam (MF) supported NiCo 2 S 4 /Ag nanowires (AgNWs) were facilely prepared and used as the compressible electrode for the asymmetric supercapacitor (ASC). AgNWs and NiCo 2 S 4 were successively decorated on the surface of MF by a two-step impregnation approach, and the resultant NiCo 2 S 4 /AgNWs/MF exhibited a high deformation-tolerance and outstanding electrochemical behaviors due to the flexible skeleton of MF, high electrical conductivity of AgNWs and high specific capacitance of NiCo 2 S 4 . More importantly, the nanosized NiCo 2 S 4 could be effectively activated by charging/discharging as the NiCo 2 S 4 nanoparticles were gradually converted into NiOOH and CoOOH nanosheets during the repeated charging/discharging cycles, resulting in significantly high capacitance retention (155 % after 2000 charging/discharging cycles). Finally, an ASC was fabricated by using NiCo 2 S 4 /AgNWs/MF as the cathode and MF supported Ti 3 C 2 T x /AgNWs (Ti 3 C 2 T x /AgNWs/MF) as the anode, which showed a high energy density of 28.8 mWh cm −3 at the power density of 754 mW cm −3 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Jinhe Wei,Fei Hu,Chenglong Lv,Limin Bian,Xinyu Quan,Qiuyun Ouyang
The design and synthesis of multifunctional nanomaterials have attracted considerable attention for expanding the range of practical applications. Herein, a metal–organic framework (MOFs)-derived NiCo 2 S 4 attached to MXene is rationally designed and constructed for an optical limiter and supercapacitor. The MOF-derived NiCo 2 S 4 enhances the tendency of hydroxyl groups on the MXene surface to attract metal ions, resulting in the formation of sulfur vacancies. Moreover, MXene offers a high specific surface area to facilitate the rapid complexation of charge carriers. The resultant MXene@NiCo 2 S 4 (MX@NCS) exhibits markedly enhanced nonlinear optical (NLO) and electrochemical properties through synergistic interactions between the components. The NLO properties can be further optimized by adjusting the amount of MX@NCS powder dispersed in methyl methacrylate (MX@NCS) 2–6 /PMMA) by using the Z-scan technique. Specifically, the (MX@NCS) 4 /PMMA exhibits the strongest reverse saturable absorption (RSA) and self-defocusing effects at 100 µJ with β = 3.87 × 10 2 cm·GW −1 and γ = −5.94 × 10 −4 cm 2 ·GW −1 . Concurrently, the constructed supercapacitor shows a superior energy density of 51.21 Wh·kg −1 at a power density of 863.65 W·kg −1 . Notably, the present study indicates a novel strategy to explore the application of materials in the development of efficient optical limiter and supercapacitor technologies.
研究领域:
材料科学
·
纳米技术
·
光学工程
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）