Journal of Energy Storage
·
2021
·
IF 6.583
Ying Wang,Cuili Xiang,Zuoan Xiao,Fen Xu,Lixian Sun,Jian Zhang,Yongjin Zou
Layered double hydroxides (LDHs) exhibit excellent electrochemical performance in alkali solutions. However, their low conductivity and poor cycle stability limit their application. In this work, Ni-Mn LDH was grown on activated carbon nanofibers (ACNFs) and then phosphidated to obtain an electrode material with a three-dimensional core–shell structure (ACNFs@Ni-Mn-P). This composite combines the electrochemical activity of the two-dimensional phosphidated nanosheets with the structural stability of the one-dimensional nanofibers. The resulting ACNFs@Ni-Mn-P electrode exhibits a high specific capacitance of 1077 F g −1 at 1 A g −1 , which is 4.9 times higher than that of a non-phosphidated ACNFs@Ni-Mn LDH electrode, and retains stability of 88.53% at a high current density of 10 A g −1 even after 5000 cycles. Moreover, an asymmetrical supercapacitor featuring an ACNFs@Ni-Mn-P positive electrode achieves comparatively prominent specific energy of 56.25 Wh kg −1 at 806.13 W kg −1 , respectively. Therefore, ACNFs@Ni-Mn-P as electrode material has great potential for application in supercapacitors.
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DOI
高影响因子
Surfaces and Interfaces
·
2021
·
IF 4.837
Nanyu Fan,Quan Kong,Ruifeng Lang,Hongtao Guan,Gang Chen,Chengjun Dong
One-dimensional (1D) Zn 2 GeO 4 rods were in-situ grown on Ni foam (NF) using a ethylenediamine (En)/water mixed solvent by a hydrothermal route in one single step. Such rhombohedral phase Zn 2 GeO 4 rods are 1–2 μm in diameter and a few micrometers in length. Ethylenediamine is found to play a critical role in coordinating with starting zinc and germanium ions and acting as template. The Zn 2 GeO 4 /NF was developed as a new none-enzymatic hydrogen peroxide (H 2 O 2 ) sensor. In electrochemical studies, the Zn 2 GeO 4 /NF electrode exhibits high sensitivity (3974 μM mM −1 cm −2 ), wide linear detection range (1–4000 μM), fast response (<9 s), low detection limit (1 μM), excellent selectivity and stability towards H 2 O 2 . Several factors such as intrinsic nature of Zn 2 GeO 4 , the unique microstructure and the seamless contact with NF are believed to attributed to the excellent electrochemical sensing performances.
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高影响因子
COMPOSITE STRUCTURES
·
2019
·
IF 4.829
Baosong Li,Weiwei Zhang,Tianyong Mei,Shengsong Du,Dandan Li,Yicheng Miao
Ni-W-ZrO 2 -CeO 2 nanocomposites were prepared by pulse electrodeposition for high wear and corrosion resistance as a protective coating. The structure (morphology, phase composition, roughness, crystallite size , surface feature) and properties (hardness, wear and corrosion resistance) of the nanocomposites were evaluated by various methods. The formation mechanism of the nanocomposites were proposed. The results show that the nanocomposite coatings are dense with nodular-like structure. The cauliflower-like protrusion clusters were formed due to the ‘tip discharge effect’ in the uneven distribution of electric field. It demonstrated that these nanoparticles were homogeneously distributed in the Ni-W matrix. The presence of the nanoparticles in Ni-W matrix improved the hardness, wear and corrosion resistance . The combination of ceramic particles and rare earth oxide particles was an excellent reinforcement phase for Ni-W matrix. The sample obtained at 1000 Hz has the optimal hardness and wear resistance, as well as the satisfying corrosion resistance. The nanocomposite deposited for 10 min owns the superior corrosion resistance in the initial stage of immersion. Ni-W-ZrO 2 -CeO 2 nanocomposites own excellent performance and exhibit potential application values in harsh conditions.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Chun Ouyan,Xinlong Zhang,Mingfang Wu,Damao Xun,Pingping Gao
Ni-P coatings including TiN nanoparticles are prepared by electroless plating on Ti plate, which is used as bipolar plates of proton exchange membrane fuel cells (PEMFCs). Scanning electronic microscope (SEM) and X-ray diffraction (XRD) are used to characterize the surface morphology and phases of the coatings, respectively. Corrosion resistance of Ni-P and Ni-P/TiN coatings are measured in the simulated solution of PEMFCs. The interfacial contact resistances (ICR) between carbon paper and bipolar plates are conducted by applied different forces. Potentiostatic polarization tests are prepared at different voltage by bubbling air and H2 at 70 °C, respectively. It is indicated that TiN particles as a core enclosed by Ni-P are entrapped into the coating by SEM images. Comparing to Ni-P coatings, the Ni-P/TiN coating shows better behaviors of corrosion resistance and low ICR. The good corrosion resistance is attributed to the formation of coating and the compact surface morphology. Hence, Ti metal with electroless plating Ni-P/TiN coating is a potential candidate for applying in the bipolar plates of PEMFCs
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Bai Miao,Tang Xiaoyu,Zhang Min,Wang Helin,Wang Zhiqiao,Shao Ahu,Ma Yue
Coupling the Si-based anodes with nickel-rich LiNi x Mn y Co 1−x−y O 2 cathodes (x ≥ 0.8) in the energy-dense cell prototype suffers from the mechanical instability of the Li-Si alloys, cathode collapse upon the high-voltage cycling, as well as the severe leakage current at elevated temperatures. More seriously, the cathode-to-anode cross-talk effect of transitional metal aggravates the depletion of the active Li reservoir. To reconcile the cation utilization degree, stress dissipation, and extreme temperature tolerance of the Si-based anode||NMC prototype, we propose a gel polymer electrolyte to reinforce the mechanical integrity of Si anode and chelate with the transitional cations towards the stabilized interfacial property. As coupling the conformal gel polymer electrolyte encapsulation with the spatial arranged Si anode and NMC811 cathode, the 2.7 Ah pouch-format cell could achieve the high energy density of 325.9 Wh kg −1 (based on the whole pouch cell), 88.7% capacity retention for 2000 cycles, self-extinguish property as well as a wide temperature tolerance. Therefore, this proposed polymerization strategy provides a leap toward the secured Li batteries.
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高影响因子
Carbon Neutralization
·
2024
·
IF 0
Longwei Li,Rongrong Li,Shaojie Zhou,Wenjun Xu,Yu Li,Jingmin Zhang,Lei Gao,Xiong Pu
Zinc bromine flow batteries (ZBFBs) are well suited for stationary energy storage due to their attractive features of high energy density and low cost. Nevertheless, the ZBFBs suffer from low power density and limited efficiency owing to the relatively severe polarization of the Br 2 /Br − redox couple. Herein, a three-dimensional (3D) hierarchical composite electrode based on core-shell Ni/NiO heterostructures anchored on graphite felt (Ni/NiO@GF) is designed to promote the kinetics of the Br 2 /Br − couple, so as to improve the power density and efficiency of the ZBFB. In this design, the highly conductive carbon felt and Ni cores provide a composite electrode with a 3D electron transporting framework to guarantee excellent electronic conductivity, while the NiO shells possess great absorption ability to Br 2 and brilliant catalytic activity for the Br 2 /Br − redox reaction to reduce the electrochemical polarization. As a result, an enhanced ZBFB with Ni/NiO@GF electrode shows an outstanding energy efficiency of 86% at 20 mA cm −2 and can be operated at a current density of up to 160 mA cm −2 with a respectable energy efficiency of 67%. These results exhibit a promising strategy to fabricate catalytic electrodes for high-performance ZBFBs.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 12
·3583-3595
·
IF 2.5
Chen Quangang,He Yi,Yan Siming,Zhou Huilian,Li Hongjie,Li Zhiyuan,Wei Kaijun,Chen Wen,Yan Jing,Wu Guiyang,Yuan Xi
The Ni-P-WS 2 composite coatings with prominent structures were constructed by composite electrodeposition by adding tungsten disulfide (WS 2 ) nanoparticles to the electroplating solution. Modification of the Ni-P-WS 2 composite coating with hexadecyltrimethoxysilane (HDTMS) is going to achieve the superhydrophobic effect. The successful construction of the superhydrophobic surface was demonstrated by X-ray diffractometer (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and contact angle measurement (CA). Electrochemical impedance spectroscopy (EIS) was used to investigate the corrosion resistance. The finding indicates that hexadecyltrimethoxysilane (HDTMS) reduces the surface energy of the Ni-P-WS 2 composite coating, generates a film on its rough surface, blocks the corrosive medium, and improves the corrosion resistance of the composite coating. The Ni-P-WS 2 nanocomposite coating’s water contact angle is 156.8° and its sliding angle is 8° at 3 g/L of WS 2 particle concentration. And the composite plating has the highest self-corrosion potential ( E corr = − 0.285 V) and the lowest self-corrosion current density ( i corr = 3.206 μA cm −2 ), with a better corrosion resistance. In addition, the prepared superhydrophobic coating showed excellent corrosion resistance under the hydrophobic barrier and the layer barrier of WS 2 nanosheets.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yong Zhang,Yutao Zhang,Caihong Wu,Yiting Yang,Qiang Li,Yongnan Chen
To improve the high-temperature oxidation resistance and electrical conductivity of ferritic stainless steels , protective Ce-doped NiMn 2 O 4 spinel coatings were fabricated on the surface of SUS430 steel by electrophoretic deposition (EPD). The phase structure and microstructure of Ce-doped NiMn 2 O 4 in both powder and coating forms were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The high-temperature oxidation of the NiMn 2 O 4 spinel coating before and after Ce doping in the air at 800 °C for 168 h was studied by weight gain experiments. The area-specific resistance (ASR) of coatings was measured by a standard four-probe method. It was found that the Ce-doped NiMn 2 O 4 spinel powder displayed a stable structure, high crystallinity, fine grain size, and decreased agglomeration when the Ce content was fixed at 0.05 mol∙L −1 . The oxidation kinetics of NiMn 2 O 4 -coated SUS430 steel before and after Ce doping obeyed a parabolic law with parabolic rate constants of 4.58 × 10 −15 g 2 cm −4 s −1 and 1.83 × 10 −15 g 2 cm −4 s −1 , respectively. When oxidized at 800 °C for 50 h, the ASR value of the coated samples before and after Ce doping stabilized at about 15.2 mΩ∙cm 2 and 14.5 mΩ∙cm 2 , respectively. This work demonstrated that the Ce-doped NiMn 2 O 4 spinel coating improved the high-temperature oxidation resistance and the electrical conductivity of metal interconnects.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Xuesong Shan,Keru Song,Siyu Huang,Jianwen Wang,Fengyue Shi,Dongyu Zhao
The annealing approach is usually used to synthesize carbon-based materials. We use polystyrene (PS) microspheres as a template to composite with carbon nanotubes (CNTs) loaded by Cu-Ni ions. After One-step high-temperature treatment, the PS microspheres disappear, and the composite materials become a three-dimensional porous structure. At the meantime, the Cu-Ni ions are reduced and attached to the material (CNTs/Cu-Ni/CP (CMP)). Then, the CMP material is coated with Polyaniline (PANI). The two-step high-temperature treatment accomplishes the Nitrogen-doped process of the material (CNTs/Cu-Ni/CP@CPANI (CMPN)). Electrochemical analysis indicates that materials have a high specific capacitance value (356F/g at 0.5 A/g). After 10,000 cycles of charging and discharging, the capacitance retention rate is 92.57 %. The assembled symmetrical supercapacitor possesses outstanding energy and power density (11.92 Wh kg −1 at 700.73 W kg −1 ).
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 2
·D37
·
IF 3.12
Tiantian Fan,Peng Sun,Jie Zhao,Zhiming Cui,Guofeng Cui
Recently, transition metal phosphides have attracted great interest of researchers as potentially promising electrode materials for supercapacitors. In this paper, three-dimensional (3D) ordered porous nickel phosphorus (Ni-P) has been facilely synthesized by a three-steps process including electrodeposition of polystyrene colloidal templates, electrodeposition of Ni-P and removing polystyrene. Compared with porous Ni, porous Ni-P exhibits ultrahigh charge storage performance (2270.26 F g−1 at 1 A g−1) and super-long cycle stability (86.6% capacity retention after 4800 cycles at 100 mV s−1). Furthermore, a flexible asymmetric supercapacitor (ASC) device assembled with porous Ni-P and activated carbon (AC) has been evaluated its performance in practical application. The ASC device displays ultrahigh energy density 20.1 Wh kg−1 at a power density of 12.8 kW kg−1, and the mass specific capacitance maintains 147.8% of the initial value after 3000 cycles. Furthermore, the energy storage mechanism of porous Ni-P and the reasons for its performance improvement have been explored. The superior performance of 3D ordered porous Ni-P makes it become the most promising material for supercapacitor.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 6
·9421-9432
·
IF 0
Che Mingda,Su Hongjian,Si Huimin,Guo Bin,Huang Renliang,Zhao Jing,Su Rongxin
As the representative volatile chlorinated hydrocarbons detected in wastewater, the removal of composite chlorinated ethenes is a major challenge in wastewater treatment. In the present study, an efficient removal system for composite chlorinated ethenes was reported, in which gallic acid was used to enhance the activation of persulfate by Fe/Ni nanoparticles. The influences of gallic acid-Fe/Ni and persulfate concentrations, initial pH value, reaction temperature, inorganic anions, and natural organic matters were evaluated in the composite chlorinated ethenes removal. Our results showed that the gallic acid-Fe/Ni-persulfate system with 9.0 mM of gallic acid-Fe/Ni and 30.0 mM of persulfate yielded about 100% trichloroethylene removal and 97.3%-98.6% perchloroethylene removal in the pH range of 3.0–12.0. Electron paramagnetic resonance analysis and radical quenching experiments indicated that SO 4 •− and • OH were the predominant radical species under acidic and alkaline conditions. Ultraviolet visible spectroscopy and inductively coupled plasma optical emission spectrometer tests revealed the Fe-gallic acid chelation could regulate the concentration of iron ions and improve the reactivity of gallic acid-Fe/Ni. These results demonstrated that the gallic acid-Fe/Ni-persulfate system was a promising strategy for treating composite chlorinated ethenes-containing wastewater.
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PubMed
CRYSTENGCOMM
·
2012
·Vol. 14
·期 23
·7942-7950
·
IF 3.842
Heng Zhang,Yi Lu,Chang-Dong Gu,Xiu-Li Wang,Jiang-Ping Tu
A new strategy for synthesizing Ni–P alloy nanoparticles with a core-shell structure is proposed, which involves a facile ionothermal process in a deep eutectic solvent (DES). The architecture of the core-shell structured Ni–P alloys is featured as amorphous spherical cores homogeneously wrapped by self-generated crystalline Ni3P shells of different thickness, which rely on the molar ratio of Ni2+/H2PO2− in the choline chloride (ChCl)/ethylene glycol (EG) based eutectic mixture. As an anode for lithium ion batteries, cyclic voltammetry curves, electrochemical impedance spectra, and cyclability of the novel structured Ni–P nanoparticles were evaluated. It was found that the sample with a thicker crystalline shell exhibited improved capability and reversibility over the sample with a thinner one, especially at a higher discharge–charge current density. It was suggested that the crystalline shell can enhance the conductivity of the amorphous cores, suppress the aggregation of active particles and increase the structural stability during cycling.
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高影响因子
危险品化学品经营许可证（带存储）