Journal of Energy Storage
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2021
·
IF 6.583
Yixiu Xin,Hongen Nian,Jinhong Li,Jiaqing Zhao,Xiaoling Tan,Yongquan Zhou,Fayan Zhu,Hongyan Liu,Xiang Li
The efficient heat energy storage and conversion can be achieved by form-stable composite phase change material (CPCM) to cope with energy supply and demand imbalances in time and space. The modification of expanded graphite (EG) is important in promoting the phase change behavior of inorganic CPCM. The NiCo 2 O 4 with spinel structure has an excellent thermal conduction channel and great hydrophilia. In this study, the in-situ NiCo 2 O 4 was adopted to optimize the thermal conductivity and improve the thermal reliability of CaCl 2 ⋅6H 2 O (CCH)-based CPCM. It was found that the obtained CPCM exhibited the enhanced thermal conductivity (4.652 W⋅ m − 1 ⋅ K − 1 ), which was nearly 8.25 times that of CCH (0.564 W⋅ m − 1 ⋅ K − 1 ). The thermal reliability increased, which was ascribable to the improvement of hydrophilicity. Moreover, the CCH-based CPCM showed great chemical compatibility, good energy storage density (149.32 J⋅ g − 1 ), and optimized apparent activation energy (363.62 kJ⋅mol −1 ). This work will provide new insights into enhanced thermal conductivity and reliability for form-stabilized CPCM by establishing three-dimensional bimetallic oxide channels.
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高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Zhihui Xu,Xuelei Li,Shishuai Sun,Zepeng Wei,Hongguo Li,Shougen Yin
The synergistic effect of the electrochemical double-layer and pseudocapacitance electrode materials has been extensively used to improve the performance of composite electrodes for supercapacitors (SCs). However, the energy density of SCs is still unsatisfactory for practical utilization. Herein, a C-NiCo2O4/C@Ni–Co–S electrode is ingeniously devised through coupling the interior of 0D/2D carbon-modified NiCo2O4 and the external sheath of Ni–Co–S nanosheets. The 0D carbon quantum dot doping can effectively avoid the agglomeration of NiCo2O4 nanoparticles and improve the electronic conductivity. 2D carbon as the intermediate layer can ameliorate the physical/chemical stability of the electrode. Ni–Co–S nanosheets can improve the area-specific capacitance of the electrode and thus enhance the energy density of the device. As expected, the C-NiCo2O4/C@Ni–Co–S electrode delivers an outstanding specific capacitance of 2396 F g–1 (7.9 F cm–2) at 3 A g–1 and excellent cycling stability (92% after 10 000 cycles). Furthermore, a quasi-solid-state asymmetric supercapacitor (ASC) using C-NiCo2O4/C@Ni–Co–S as positive electrode and active carbon (AC) as negative electrode exhibits a high energy density of 95 Wh kg–1 at 0.9 kW kg–1 and an excellent cycle performance. Our work reveals that this reasonable structure design is very effective for achieving a high-performance positive electrode for practical SC applications.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
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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.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
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IF 7.489
Mingliang Ma,Wenting Li,Zhouyu Tong,Yong Ma,Yuxin Bi,Zijian Liao,Jian Zhou,Guanglei Wu,Mingxia Li,Jiewei Yue,Xinyu Song,Xinyue Zhang
One-dimensional (1D) ZnFe 2 O 4 @SiO 2 (ZS) nanochains were prepared with Stöber method under external magnetic field. Then, 1D ZS nanochains were covered with a uniform polydopamine (PDA) shell, and the pyrolysis process was completed to obtain 1D ZnFe 2 O 4 @SiO 2 @C (ZSC) nanochains. Finally, 1D flower-like ZnFe 2 O 4 @SiO 2 @C@NiCo 2 O 4 (ZSCNC) nanochains were fabricated through a simple hydrothermal method. The carbon layer with strong dielectric loss enabled the 1D ZSC nanochains to achieve an ultra-wide effective absorption bandwidth (EAB) of 6.22 GHz. Compared with the above nanochains, the 1D ZSCNC nanochains showed more excellent microwave absorption (MA) properties because of the unique 1D flower-like architectures having large surfaces and multiple interfaces. The sample loaded with 30 wt% 1D flower-like ZSCNC nanochains showed strong MA performances with a minimum reflection loss (RL) value of −54.29 dB (11.14 GHz) and an EAB of 5.66 GHz (11.94–17.60 GHz) at the thickness of 2.39 mm. The 1D flower-like ZSCNC nanochains with strong absorption, broad absorption bandwidth (almost the entire Ku band) and thin layer has a good application prospect for the absorption of electromagnetic waves in Ku band.
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Journal of Water Process Engineering
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2020
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IF 3.465
Jing Di,Minzhi Zhu,Ropafadzo Jamakanga,Xikun Gai,Yin Li,Ruiqin Yang
Peroxymonosulfate (PMS) is a strong oxidizing agent that can generate reactive oxygen species (ROSs) to decompose organic pollutants . It can be activated by either chemical catalysis or electrochemical processes, both of which are limited by low catalytic efficiency. In this study, electrochemical oxidation and advanced oxidation of PMS on a NiCo 2 O 4 nanoarray cathode were integrated to decompose Rhodamine B (RhB). The combined method exhibited faster decolourisation rates and increased reaction efficiencies compared to systems using either electrochemistry or PMS alone. The effects of pH, PMS dosage, initial RhB concentration, and current density were investigated. The activation of PMS (2 g·L −1 ) under a current density of 10 mA·cm -2 at neutral pH showed a high decolourisation efficiency of 99.7 % for the RhB solution (100 mg L −1 ) in 60 min. The corresponding total organic carbon (TOC) removal efficiency was 28.9 %. The electrode could be reused for at least four cycles while maintaining its high activity. Furthermore, scavenging experiments were conducted with various radical scavengers to identify the major ROSs. Our mechanistic study suggested that O 2 - and 1 O 2 play key roles in the degradation process. A synergistic effect was promoted by combining electrochemical and chemical processes for PMS activation . The results presented herein provide fundamental insight into advanced oxidation processes with PMS.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
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2023
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IF 4.7
Qianglong Chen,Ruibin Guo,Yangyang Jiang,Li Li,Wenjing Qin,Yanchun Tan,Nijuan Liu,Zunli Mo
CoMoO 4 /NiCo 2 O 4 electrodes with a three-dimensional nano-sphere structure have been successfully prepared by a combination of hydrothermal and calcination methods. The electrode material exhibits a high specific capacitance of 1175 F g −1 at 1 A/g, excellent multiplicative performance (74.2 % capacity at 15 A/g) and good cycling stability (85.9 % specific capacitance retention after 10,000 cycles). The asymmetric supercapacitor was constructed using activated carbon (AC) as the negative electrode, showing excellent energy density (27.7 wh kg −1 ) and power density (806 W kg −1 ). It also has an extremely long operating life, maintaining a specific capacitance of 78.3 % after 5000 cycles at current densities up to 6 A/g. The results indicate that the synthesized mixed transition metal oxides CoMoO 4 /NiCo 2 O 4 are promising as composite electrode materials for high-performance asymmetric supercapacitors.
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高影响因子
MATERIALS RESEARCH BULLETIN
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2023
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IF 5.4
Dongfang Lv,Jingchuang Han,Zhaowu Li,Jie Xiong,Pingfan Du,Lixin Song
Inorganic hole transport materials (HTMs) play an important role for the stability and efficiency of planar perovskite solar cells (PSCs). Among the numerous inorganic HTMs, NiCo 2 O 4 with its excellent performance is the emerging candidate for hole transport layers (HTLs) and is attracting increasing attention. However, the low electrical conductivity and optical transmittance of NiCo 2 O 4 severely limit the device performance. Herein, the Zn 2+ was used to dope NiCo 2 O 4 to improve the electrical conductivity and optical transmittance of NiCo 2 O 4 . And the effects of the concentration of Zn 2+ on the morphology, structure and properties of NiCo 2 O 4 were investigated. The morphology and transparency of Zn x Ni 1-x Co 2 O 4 would not be affected when the concentration of Zn 2+ is below 0.1, but when it is up to 0.15 and 0.2, the morphology of NiCo 2 O 4 clustered together or showed a diamond-shaped block, and the optical transmittance also decreased significantly. Meanwhile, with the increase of doping amount, the conductivity and hole mobility are gradually increased. As a result, the optimal concentration of Zn 2+ is 0.1. Besides, the Zn 0.1 Ni 0.9 Co 2 O 4 possessed a significant improvement in hole extraction and better band alignment compared to the NiCo 2 O 4. And hence, the power conversion efficiency (PCE) of PSCs fabricated in open air is up to 13.41% by using Zn 0.1 Ni 0.9 Co 2 O 4 . This work develops a potential strategy for developing highly efficient and stable PSCs, opens up a new horizon for the development of inorganic HTMs.
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ChemElectroChem
·
2019
·Vol. 6
·期 17
·4645-4652
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IF 3.975
Wei Guo,Yueli Wu,Yamei Tian,Xiaojuan Lian,Jiyang Li,Shuang Wang
Graphical Hollow but not empty :A hollow and porous NiCo 2 O 4 /CoMoO 4 hybrid is prepared through a hydrothermal method. The sample exhibits excellent specific capacitance. An assembled hybrid supercapacitor delivers a high energy density and a long-term cycling performance. Thus, the NiCo 2 O 4 /CoMoO 4 hybrid has a competitive advantage as an electrode material for high-performancesupercapacitors. The hierarchical hollow NiCo 2 O 4 /CoMoO 4 hybrid composite was directly grown on Ni foam (NF) under hydrothermal conditions at 110–140 °C for different growth times. This robust hollow structure benefits from a weakly alkaline environment provided by tetramethyl ammonium hydroxide and can provide a large surface area, low resistance, and many active sites to facilitate electrolyte ion transport and fast redox reactions. The as-prepared NiCo 2 O 4 /CoMoO 4 hybrid with synergetic effects shows improved electrochemical properties with an excellent capacitance (2080 F/g at 1 A/g) and long-term cycling reliability (70 % retention undergoing 3000 cycles at 10 A/g). An assembled hybrid supercapacitor based on the as-prepared NiCo 2 O 4 /CoMoO 4 hybrid electrode delivers a high energy density of 35.63 Wh/kg at a power density of 845 W/kg and a long-term cycling life (capacitance retention of 71.4 % over 9000 cycles). Thus, the as-prepared NiCo 2 O 4 /CoMoO 4 nanocomposite has a definite advantage for supercapacitor electrode materials.
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高影响因子
CATALYSIS LETTERS
·
2018
·Vol. 148
·期 9
·2799-2811
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IF 2.911
Huang Qifu,Li Wenzhi,Lei Yanyan,Guan Shengnan,Zheng Xusheng,Pan Yang,Wen Wu,Zhu Junfa,Zhang Haitao,Lin Qizhao
Abstract In this work, NiCo 2 O 4 with a hierarchical porous flower-like structure was fabricated and used as catalyst support for Pd nanoparticles. The NiCo 2 O 4 was composed of porous nanoplates without overlapping, and the Pd nanoparticles were uniformly distributed on these nanoplates. Pd–NiCo 2 O 4 with the Pd loading of 2.0 wt% showed extremely high activity and stability, methane (1.0% CH 4 /Air) can be totally oxidized at 330 °C and the T 90 is 309 °C, which is much lower than that of pure NiCo 2 O 4 (T 90 = 405 °C). At wet condition with the presence of 10 vol% water vapor, the catalytic activity was still acceptable with the T 90 of 366 °C, and no activity decrease or permanent damage for the catalyst was observed after 35 h reaction, showing high stability. A series of techniques including TEM, SEM, XRD, H 2 -TPR, BET and especially quasi in situ XPS combined with in situ MS were used to characterize the catalysts and investigate the catalysis mechanism. Two pathways of CHO evolution were proved by the quasi in situ XPS and in situ MS results: OCHO intermediate dehydrogenation pathway at lower temperature and CO oxidation pathway of CHO at higher temperature. Graphical Abstract
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Energy Technology
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2017
·Vol. 5
·期 8
·1449-1456
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IF 2.789
Qiufan Wang,Daohong Zhang,Yunlong Wu,Ting Li,Aiqing Zhang,Menghe Miao
Linear flexible supercapacitors are of considerable interest for future wearable electronics and photodetectors. Inorganic metallic oxide-based electrochemical pseudocapacitors have a high energy density whereas supercapacitors based on carbon-nanotube (CNT) yarns show high flexibility and high power densities. Besides high power density and energy density, fabrication of linear supercapacitors with excellent flexibility is still a challenge. Here, we report a linear supercapacitor architecture obtained by integrating CNT yarn and a Cu filament with NiCo 2 O 4 nanowires. NiCo 2 O 4 nanowires grow in situ on the surface of CNT yarn intertwined with the Cu filament. Due to the high electrochemical performance of both NiCo 2 O 4 nanowires and CNT yarn and the high charge-transport efficiency of the Cu filament as current collector, the supercapacitor demonstrates a specific areal capacitance as high as 277.3 mF cm 2 and an energy density of 35.76 μWh cm −2 coupled with a power density 0.154 mW cm −2 . The linear supercapacitor is very flexible and can be woven into a fabric without losing its capacity to store energy. Its capacitance remains at 89 % after 5000 charge/discharge cycles. The linear supercapacitor may be used as an ultraviolet photodetector with good stability in response to the UV light signal and also to power light-emitting diodes (LEDs).
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高影响因子
ELECTROCHIMICA ACTA
·
2017
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IF 4.798
Bei Xue,Kezhi Li,Lei Feng,Jinhua Lu,Leilei Zhang
Graphene (G) wrapped porous Co 3 O 4 /NiCo 2 O 4 double-shelled nanocages (Co 3 O 4 /NiCo 2 O 4 DSNCs@G) were prepared by the formation of Co 3 O 4 /NiCo 2 O 4 DSNCs using zeolite imidazole frameworks-67 as template with the subsequent calcination and package of G by hydrothermal method. The abundant accessible active sites provided by the porous structure of Co 3 O 4 /NiCo 2 O 4 DSNCs and efficient electron transport pathways for electrocatalytic reaction offered by the high conductive G worked very well together in a ferocious synergy, which endowed Co 3 O 4 /NiCo 2 O 4 DSNCs@G with excellent electrocatalytic behaviors for determining glucose. A comparison between Co 3 O 4 /NiCo 2 O 4 DSNCs without G packing and Co 3 O 4 /NiCo 2 O 4 DSNCs@G showed that former had linear response window concentrations of 0.01-3.52 mM (correlation coefficient = 0.999), detection limit of 0.744 μM (S/N = 3) and sensitivity of 0.196 mA mM −1 cm −2 , whereas the latter exhibited linear response window concentrations of 0.01-3.52 mM (correlation coefficient = 0.999), detection limit of 0.384 μM (S/N = 3) and sensitivity of 0.304 mA mM −1 cm −2 . The combination of Co 3 O 4 /NiCo 2 O 4 DSNCs and G was a meaningful strategy to fabricate high-performance non-enzyme glucose sensors with low detection limit, good selectivity and high sensitivity.
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高影响因子
TALANTA
·
2016
·
IF 4.035
Shiqiang Cui,Li Li,Yaping Ding,Jiangjiang Zhang,Hua Yang,Yingzi Wang
The glassy carbon electrode (GCE) modified with mesoporous NiCo 2 O 4 -decorated reduced graphene oxide (NiCo 2 O 4 /rGO) was first applied for the electrochemical determination of rutin . The synthesized NiCo 2 O 4 and NiCo 2 O 4 /rGO were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Brunauer-Emmett-Teller (BET) method. The sensor not only showed a satisfactory linear range (0.1–150 μM) and detection limit (0.01 μM) but also exhibited the good anti-interference abilities, low price, high stability, as well as favorable precision and accuracy. The present work is meaningful to expand functionalized graphene composites to sensor fields and promote the development of rutin sensors.
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高影响因子
危险品化学品经营许可证（带存储）