Journal of Energy Storage
·
2025
·
IF 9.8
Enxuan Li,Liangyu Liu,Leiyun Han,Chunli Guo,Peng Liu,Xiaoyang Liu
NiMoO 4 (NMO) and NiMoO 4 ·xH 2 O/carbon composites with rod-like structures were prepared by a simple, fast, and environmentally friendly microwave-assisted method and the effects of different carbon sources on their electrochemical properties were investigated. Glucose and potato starch were used as carbon sources, respectively, and the prepared materials, named NMOG and NMOS, were characterized by powder X-ray diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. Their electrochemical behaviors were examined by cyclic voltammetry (CV) and constant-current charge-discharge (GCD) techniques. The NiMoO 4 ·xH 2 O/carbon composites exhibited higher specific capacitance than NiMoO 4 due to its low crystallinity and good electrical conductivity of carbon. The specific capacitances were measured at 318.5, 420.5, and 485.3 F g −1 respectively at a current density of 1 A g −1 . In addition, asymmetric supercapacitors (ASCs) were constructed using prepared NMOS-2 as the positive electrode and activated carbon (AC) as the negative electrode. The energy density was 21.62 Wh kg −1 at a power density of 800 W kg −1 . The NMOS-2//AC ASC device showed good cycling stability with 85 % capacity retention after 10,000 cycles. This indicates that NMOS-2 is a promising electrode material for supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 7
·2925-2933
·
IF 2.8
Wang Lu,Li Jingjing,You Junhua,Wang Zhiwei,Qi Xiaojing,Xu Jingsheng
NiCo 2 O 4 /NiMoO 4 hierarchical composite structure is used for high-performance supercapacitors electrode materials. The electrode material is grown directly on the conductive carbon cloth, which effectively reduces the contact resistance between the collector and the active material, and provides a favorable skeleton structure for NiCo 2 O 4 /NiMoO 4 . In this work, NiCo 2 O 4 /NiMoO 4 electrodes were prepared under optimal conditions of primary hydrothermal time of 12 h, annealing temperature of 350 °C, and secondary hydrothermal time of 8 h. The optimized hierarchical NiCo 2 O 4 /NiMoO 4 electrode exhibits a high areal capacitance of 3.85 F·cm −2 (at a current density of 4 mA·cm −2 ) and better cycle stability than the NiCo 2 O 4 and NiMoO 4 electrode, respectively. The constructed asymmetric supercapacitor NiCo 2 O 4 /NiMoO 4 //AC has a satisfactory energy density of 38.69 Wh·kg −1 at 228.56 W·kg −1 power density. At the current density of 4 mA·cm −2 , ASC devices still have a capacity retention rate of 90.88% after 5000 cycles, indicating their potential application in energy storage devices.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2018
·Vol. 10
·期 23
·5533-5540
·
IF 4.674
Xiaoqiang Du,Jianpeng Fu,Xiaoshuang Zhang
Graphical Foaming at the mouth of the catalyst : NiCo 2 O 4 @NiMoO 4 core−shell hybrid nanostructure was successfully prepared by hydrothermal calcination method. The nanostructure is a low cost and relatively stable electrocatalytic water splitting catalyst. The NiCo 2 O 4 @NiMoO 4 /NF-8 h nanorod electrode shows excellent electrocatalytic activity with a low voltage 1.55 V and stability with long hour electrolysis, which is highly satisfactory for a prospective bifunctional electrocatalyst. Splitting water to make hydrogen is one of the most effective ways to solve the energy crisis. In this paper, we started with the catalysts of the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) of electrocatalytic water splitting, studied the catalysts with great stability and practicality, and designed NiCo 2 O 4 nanowires as precursors, on whose surface we set NiMoO 4 nanosheets. Cobalt elements were introduced on the nickel foam with electrocatalytic properties, and a flower-like NiCo 2 O 4 @NiMoO 4 core-shell hybrid nanostructure was prepared by a hydrothermal method. The series of core-shell nanocatalysts were characterized via XRD, SEM, XPS, etc. The electrochemical properties of the obtained catalysts were also measured, and the conclusion that the catalysts could reduce the overpotential of the reaction required was figured out. The conclusion of the overpotential of catalyzing the water splitting reaction provides new ideas for the research of the catalyst for electrocatalytic water splitting reaction.
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 SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 5
·5109-5119
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IF 2.195
Xu Xiaoyang,Liu Qianqian,Wei Ting,Zhao Ying,Zhang Xiangjing
The NiMoO 4 sheets were grown on graphitic carbon nitride (g-C 3 N 4 ) using a very simple chemical precipitation method. The prepared g-C 3 N 4 /NiMoO 4 can be used as the electrode material of supercapacitors and exhibit a high specific capacitance of 1275 F g −1 at 0.25 A g −1 owing to the interconnected structure and presence of N by the incorporation of g-C 3 N 4 . In addition, the g-C 3 N 4 /NiMoO 4 //rGO hybrid supercapacitor was assembled by employing g-C 3 N 4 /NiMoO 4 and rGO as positive and negative electrode respectively. The assembled hybrid device can exhibit good electrochemical performances, such as the specific capacitance of 146 F g −1 , energy density of 90 Wh kg −1 and accepted cycle stability with 70% capacitance retention after 4000 continuous cycles. These results powerfully demonstrate that the prepared g-C 3 N 4 /NiMoO 4 can be applied as a potential candidate in the electrode material of supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2019
·
IF 1.901
Yingying Hao,Hui Huang,Qingqing Wang,Qian Wang,Guowei Zhou
A novel and facile strategy was developed to prepare nitrogen-doped carbon/NiMoO 4 (NDC/NiMoO 4 ) nanospheres using cetyltrimethylammonium bromide–polyvinyl pyrrolidone–cyclohexane–water–ethanol microemulsion aggregation as a soft template. The prepared NDC/NiMoO 4 exhibited a marvelous specific capacitance of 1045 F g −1 at 1 A g −1 . After 10,000 cycles the specific capacity is 60% of the initial performance. The energy density reached 107.3 Wh kg −1 at a power density of 799.9 W kg −1 . The excellent electrochemical performance can be attributed to the unique morphology of NDC/NiMoO 4 and the abundant doped N and C elements. This study enables their application in high-performance supercapacitors.
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
INORGANIC CHEMISTRY COMMUNICATIONS
·
2019
·
IF 1.795
Yong Zhang,Cui-rong Chang,Xiao-dong Jia,Qing-yuan Huo,Hai-li Gao,Ji Yan,Ai-qin Zhang,Yi Ru,Han-xin Mei,Ke-zheng Gao,Li-zhen Wang
In order to improve the capacitive performance of supercapacitors, NiMoO 4 electrode materials were successfully prepared by a simple and safe solvent-thermal method, and the morphology, microstructure and properties of the materials were successfully optimized by adding reduced graphene oxide (rGO) and multiwalled carbon nanotubes (MWCNTs). The morphology, structure and electrochemical properties of the as-prepared samples were investigated by SEM, XRD, laser particle size, cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The results showed that the addition of rGO and MWCNTs could greatly affect the morphology and capacitance properties of NiMoO 4 . The mixed characteristics of pine needle-like and microspheres NiMoO 4 gradually changes into honeycomb structure of NiMoO 4 /rGO after the addition of rGO, while the NiMoO 4 /MWCNTs shows the mixed characteristics of honeycomb and microrod-like. In addition, compared with pure NiMoO 4 and NiMoO 4 /rGO, the NiMoO 4 /MWCNTs shows more uniform particle size distribution, more active sites, smaller charge transfer resistance and higher ionic diffusion coefficient, thus exhibiting better supercapacitance performance. Under the current density of 1, 4, 7 and 10 A g −1 , the discharge specific capacitance is 805, 702, 643 and 584 F g −1 , respectively. Moreover, the capacity retention of NiMoO 4 /MWCNTs still maintains 66.7% after 1000 cycles at the high rate current density of 1 A g −1 , which shows good high current charging and discharging performance and application prospect, providing a new idea for designing high efficiency and low cost supercapacitors electrode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Ruibin Liang,Yongquan Du,Junxi Wu,Xintong Li,Tongxin Liang,Jian Yuan,Peng Xiao,Jianwen Chen
In this work, g-C 3 N 4 @NiMoO 4 /CoMoO 4 (gCN@NCM) was fabricated by a hydrothermal method . g-C 3 N 4 sheets were embedded in staggered NiMoO 4 /CoMoO 4 rods to form a three-dimensional structure. The prepared gCN@NCM exhibited good electrochemical performance of high specific capacitance (641.5 F/g) and excellent cycle stability (15.79% of capacitance lost after 8000 cycles). The specific capacitance of the gCN@NCM//active carbon (AC) device got 30% enhanced at the first 2000 cycles. Moreover, 110% of the original specific capacitance was still maintained after 10,000 cycles. These results indicate that the g-C 3 N 4 @NiMoO 4 /CoMoO 4 has great potential in supercapacitors .
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 43
·36484-36490
·
IF 3.289
Xiaoxia Wang,Baoqin Zhang,Mingxun Yu,Jingquan Liu
Hierarchical hybrid nanostructures are desirable materials for microwave absorption (MA) capacity. However, how to obtain this kind of versatile structural materials still remains a great challenge. In this work, a novel MA composite of MnO2@NiMoO4 was synthesized via two-step hydrothermal processes combined with a simple annealing process. As confirmed by X-ray diffraction, scanning electron microscopy, energy-dispersive spectrometry, and transmission electron microscopy analysis, the well-defined NiMoO4 nanosheets could uniformly cover the surface of the MnO2 nanorods. Compared with pure MnO2 nanorods, these hierarchical composite structures could provide a higher superficial area, and more effective components, which will favor the penetration of microwaves into the absorber effectively instead of reflecting it, and then translate it into thermal energy. The minimum reflection loss (RL) value of MnO2@NiMoO4 composites was −31.4 dB at 11.2 GHz with a thickness of 3 mm, and the band of reflection loss was below −10 dB when frequency was in the range from 9.6 to 14.1 GHz. However, the minimum RL value of MnO2 was only −12.5 dB at 10.4 GHz with a thickness of 3 mm. The significantly enhanced microwave absorption of MnO2@NiMoO4 composites is mainly attributed to the hierarchical hybrid nanostructures, multi-effective components, good impedance matching, and interfacial polarization between MnO2 and NiMoO4. Meanwhile, the surface attached NiMoO4 is useful to increase the multiple reflection of electromagneticwaves. It is believed that these MnO2@NiMoO4 composites could serve as an excellent microwave absorber in practical applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 4
·1501-1510
·
IF 2.961
Fu Yajing,Zhang Canping,Pan Lin,Yang Longyu,Wang Shiquan,Liu Jianwen
Different amounts of Fe 2 O 3 -coated NiMoO 4 /NiO composites were prepared by solvothermal method following with annealing process. The as-prepared NiMoO 4 /NiO@Fe 2 O 3 composite exhibits a reversible specific capacity of 1250 mAh g −1 after 150 cycles at a current density of 100 mA g −1 as anode for lithium-ion batteries. It exhibits efficient long-term electrochemical performance and maintains the capacity at about 750 mAh g −1 at a high current density of 500 mA g −1 after 200 cycles. The good electrochemical performance of the NiMoO 4 /NiO@Fe 2 O 3 composite may be due to its smaller size and the Fe 2 O 3 coating which can restrain its volume collapse during the charge–discharge cycle. This work could provide a promising strategy for enhancing the performance of molybdate-based composite materials for practical application in lithium-ion batteries.
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 POWER SOURCES
·
2025
·
IF 7.9
Yujie Xiang,Zhengting Wang,Ying Zhang,Rui Gao,Yonggui Tao,Chisheng Deng,Shukang Deng,Jinsong Wang,Kaiyuan Shen
The environmentally friendly and sustainable characteristics of hydrogen generation through water electrolysis have drawn considerable interest. However, the inherently retarded reaction dynamics of the oxygen evolution reaction (OER) limit its efficiency. Consequently, advancing high-performance and cost-effective OER electrocatalysts significantly strengthen the water electrolysis’ performance. A composite nanostructured catalyst is successfully developed by integrating S-doped NiMoO 4 with NiFe-layered double hydroxides (LDH). Characterization results indicate that the NiMoO 4 -decorated NiFe-LDH increases catalytic efficiency by providing additional active sites, while the introduced S further enhances electrical conductivity. Electrochemical tests reveal that the OER capability of S-NiMoO 4 @NiFe-LDH under alkaline conditions is exceptional, achieving a negligible overpotential of 256 mV at 50 mA cm −2 and a minimal Tafel slope of 27.8 mV dec −1 , along with outstanding durability at 10 mA cm −2 (200 h). Furthermore, electrochemical probe experiments and mechanistic analyses reveal the possible potential reaction route of the catalyst during the OER, playing a crucial role in clarifying how the adsorbate evolution mechanism (AEM) and the lattice oxygen mechanism (LOM) synergistically enhance catalytic performance. This study affords a compelling strategy for establishing stable and efficient catalysts for electrochemical water oxidation.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jinyun Liao,Yujie Wu,Youxiang Shao,Yufa Feng,Xuefeng Zhang,Wanling Zhang,Junhao Li,Ming Wu,Huafeng Dong,Quanbing Liu,Hao Li
Catalytic methanolysis of ammonia borane (AB) is an integrated hydrogen storage-production technology with bright prospects; the development of robust and cheap catalysts is crucial for its wide applications. In this study, we developed heterostructured Cu 3 Mo 2 O 9 /NiMoO 4 hollow spheres comprised of nanoplatelets as catalysts for AB methanolysis. The Cu 3 Mo 2 O 9 /NiMoO 4 catalyst with the optimal Cu/Ni ratio exhibited robust reactivity with a turnover frequency (TOF) of 62.1 mol hydrogen min −1 mol cat −1 , which is superior to other precious-metal-free catalysts ever reported in the literature. Based on the theoretical calculation results, it was found that the d band center of the heterostructured Cu 3 Mo 2 O 9 /NiMoO 4 catalysts exhibited an up shift compared to those of single Cu 3 Mo 2 O 9 and NiMoO 4 , which was favorable for the chemisorption of the reactants. In addition, it was revealed that the active Ni and Cu sites in Cu 3 Mo 2 O 9 /NiMoO 4 catalysts were responsible for the adsorption and activation of CH 3 OH and AB, respectively. The rate-determining step of AB methanolysis over Cu 3 Mo 2 O 9 /NiMoO 4 catalyst was identified, and a possible reaction mechanism was proposed. This study may provide a deeper understanding of the adsorption and activation behaviors of methanol and AB, cooperative roles of different active sites on the heterostructured catalyst, as well as the reaction mechanism, conducive to the rational design of inexpensive and high-performing catalysts for AB methanolysis for hydrogen production.
研究领域:
催化化学
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Qiulin Li,Ke Zhang,Xiang Li,Jiaqi He,Yongbing Lou,Jinxi Chen
The creation of considerably effective electrocatalysts to reduce overpotentials is essential for speeding up the sluggish oxygen evolution reaction (OER) processes, which is imperatively required for the practical exploitation of electrochemical water-splitting. Herein, we prepared a unique composite structure, uniformly spherical Ni-MOF decorated with NiMoO 4 nanorods on Ni foam (NF), and assessed its performance toward oxygen evolution reaction. The synergistic effect between NiMoO 4 and Ni-MOF remarkably promoted the OER intrinsic activity. Moreover, introducing NiMoO 4 endowed the composite structure with enhanced electrical conductivity and exposed more active sites. The NiMoO 4 /Ni-MOF/NF electrode exhibited exceptional electrocatalytic activity in 1.0 M KOH aqueous solution, with a low overpotential of 218 mV to drive the current density of 10 mA cm −2 and a low Tafel slope (67.75 mV dec −1 ), surpassing the benchmark RuO 2 . The presented strategy opens a promising candidate for preparing novel non-precious metal OER electrocatalysts derived from MOF materials for sustainable energy applications.
研究领域:
材料科学
·
电化学
✓ 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）