Nanomaterials
·
2022
·Vol. 12
·期 8
·1347
·
IF 5.719
Wen Jiang,Lingling Dong,Shuanghui Liu,Shuangshuang Zhao,Kairu Han,Weimin Zhang,Kefeng Pan,Lipeng Zhang
Lithium-sulfur batteries exhibit great potential as one of the most promising energy storage devices due to their high theoretical energy density and specific capacity. However, the shuttle effect of the soluble polysulfide intermediates could lead to a severe self-discharge effect that hinders the development of lithium-sulfur batteries. In this paper, a battery separator has been prepared based on NiFe2O4/Ketjen Black (KB) modification by a simple method to solve the shuttle effect and improve the battery performance. The as-modified separator with the combination of small-size KB and NiFe2O4nanoparticles can effectively use the physical and chemical double-layer adsorption to prevent polysulfide from the shuttle. Moreover, it can give full play to its catalytic effect to improve the conversion efficiency of polysulfide and activate the dead sulfur. The results show that the NiFe2O4/KB-modified separator battery still maintains a discharge capacity of 406.27 mAh/g after 1000 stable cycles at a high current density of 1 C. Furthermore, the coulombic efficiency remains at 99%, and the average capacity attenuation per cycle is only 0.051%. This simple and effective method can significantly improve the application capacity of lithium-sulfur batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shuang Gao,Zhenxing Wang,Yan Chen,Yimu Wang,Qiyuan Fu,Changhao Feng
The efficient and rapid detection of triethylamine (TEA) is crucial in the field of gas sensors. Sensors fabricated using doped ternary metal oxides demonstrate high response, good stability, excellent gas selectivity, and reproducibility. In this study, NiFe 2 O 4 nanofibers doped with different concentrations of Yttrium (Y/Ni = 0 at%, 1.5 at%, 2.5 at%, 3.5 at% and 4.5 at%) were synthesized via electrospinning, and gas sensors fabricated from these materials were systematically analyzed for their gas-sensing performances. The results indicated that the gas-sensing properties of Y-doped NiFe 2 O 4 nanofibers were improved. Gas sensors based on Yttrium-doped NiFe 2 O 4 nanofibers with a Y/Ni ratio of 2.5 % (referred to as 2.5 % Y-NFO) exhibited the best performance, exhibiting a gas response of 39.3 for the detection of triethylamine at a concentration of 100 ppm at 125 °C. This response was about 3.1 times higher than pure NiFe 2 O 4 nanofibers. Additionally, the response time of 2.5 % Y-NFO is only 2 s, which is much faster than other reported TEA sensors. In addition, these gas sensors exhibit excellent repeatability, selectivity, and humidity resistance. Finally, the underlying mechanism responsible for the enhanced gas-sensing properties is comprehensively discussed. This study presents a simple, stable, and effective route for synthesizing Y-NiFe 2 O 4 nanofibers, thereby achieving excellent sensing performance for TEA detection.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2024
·
IF 14.3
Yang Peng,Xu Zhao,Yiqun Shao,Xin Yue,Zhuofeng Hu,Shaoming Huang
Spinel-type nickel ferrite (Ni x Fe 3-x O 4 , x≤1) is a widely used electrocatalyst for the oxygen evolution reaction (OER). Due to the lower hybridization of metal- d and oxygen- p orbitals, the OER process on Ni x Fe 3-x O 4 follows the sluggish adsorbate evolution mechanism (AEM). Generally, activating the lattice oxygen to trigger the lattice-oxygen-mediated mechanism (LOM) can enhance the OER activity. Herein, to trigger the LOM pathway while maintaining high stability, iron foam (IF)-supported Ni 0.75 Fe 2.25 O 4 (NiFeO) with geometrical defects of [NiO 6 ] (nickel cation coordinated with six oxygen anions) units and higher ratio of Fe to Ni cations in octahedral sites ( d -NiFe HR O/IF) is prepared by ion-exchanging with polar aprotic solvent followed by annealing. As a result, as-synthesized d -NiFe HR O/IF exhibits excellent activity (at 295 mV overpotential to achieve 100 mA cm −2 ), fast kinetics (Tafel slope of only 34.6 mV dec −1 ), and high stability (maintaining a current density of 100 mA cm −2 over 130 h) for the OER. The theoretical calculations reveal that the construction of octahedral defect in Ni x Fe 3-x O 4 enhances the overlap of Fe- d and O- p orbitals, which can activate the lattice oxygen. Therefore, increasing the ratio of Fe to Ni will further improve the lattice oxygen redox activity, and thus trigger the fast LOM pathway, ultimately facilitating the OER process.
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
Journal of Materials Chemistry A
·
2017
·Vol. 6
·期 4
·1551-1560
·
IF 8.867
M. Y. Gao,J. R. Zeng,Q. B. Zhang,C. Yang,X. T. Li,Y. X. Hua,C. Y. Xu
The rational design of noble metal-free electrocatalysts that are highly active, robustly stable, and capable of delivering large current densities (>500 mA cm−2) at low applied potentials (<300 mV), in particular for oxygen evolution reaction (OER), is critical for practical use in electro-driven water-splitting devices. Herein, we report a facile scalable and one-step electrochemical deposition approach for the development of a self-supported 3D nanoporous S-doped amorphous NiFe2O4/Ni3Fe composite electrode with outstanding OER electrocatalytic activity and robust durability in alkaline media. Benefiting from the 3D nanoporous architectures and their in situ growth on a highly conductive substrate, the novel S-doped NiFe2O4/Ni3Fe composite electrode offers an ideal platform for fast electron transport and efficient mass transport. It also provides abundant active surface area as well as accessible active sites for a catalytic reaction. Impressively, the S-doped composite electrode displays superior OER activity in 1.0 M KOH that compares favorably with the state-of-the-art RuO2 catalyst. Low overpotentials of 260 and 285 mV (iR corrected) are required to reach long-term stable current densities of 100 and 500 mA cm−2 for OER, respectively. The electrolyzer cell obtained by pairing this S-doped composite electrode as an anode with a Ni–Mo based cathode for overall water-splitting works efficiently in both 1.0 M (1.52 V for 10 mA cm−2 and 1.79 V for 100 mA cm−2) and 30 wt% KOH (1.69 V for 100 mA cm−2) solutions, with long durability for over 220 h. Such catalyst couple exhibits superior catalytic performance and holds great promise for potential application in electrochemical water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 10
·1232
·
IF 4.501
Yunhe Li,Weibao Liu,Lezhuo Li,Siyuan Jiang,Xiuwen Cheng
In this study, a nickel ferrite (NiFe2O4) system was constructed to purify a phenol solution in water. During the process, the influences of several critical operating parameters including the NiFe2O4amount, PS dosage, MW power, initial pH value, and different natural water anions were systematically studied. The results indicated that the constructed system performed excellently regarding the removal efficiency (97.74%) of phenol within 30 min. Meanwhile, the influence of co-existing anions such as Cl−, NO3−, H2PO4−, and HCO3−was also studied, which displayed an inhibiting action on phenol degradation, while HA facilitated it. To explore the reaction mechanism of this system, major free radical quenching experiments were conducted, and it was confirmed that both SO4•−and HO• were primary radicals. Moreover, stability experiments confirmed the apt stability of the NiFe2O4system. Besides, the mineralization and toxicity analysis performed during phenol degradation also confirmed the superiority of the as-constructed system. Furthermore, the possible degradation mechanism of phenol was proposed. Hence, this system could be applied in advanced wastewater treatment.Keywords:persulfate;microwave;sulfate radicals;phenol;nickel ferrite
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2016
·
IF 4.836
Bo Xiang,Dong Ling,Han Lou,Hongbo Gu
A functionalized magnetic nickel ferrite/manganese dioxide (NiFe 2 O 4 /MnO 2 ) with 3D hierarchical flower-like and core–shell structure was synthesized by a facile hydrothermal approach and applied for the removal of Pb(II) ions from aqueous solutions. Batch adsorption experiments were conducted to study the effect of solution pH, initial Pb(II) concentration, and dose of absorbents on the Pb(II) removal by NiFe 2 O 4 /MnO 2 . The NiFe 2 O 4 /MnO 2 nanocomposites showed the fast Pb(II) adsorption performance with the maximum adsorption capacity of 85.78 mg g −1 . The adsorption kinetics of Pb(II) onto NiFe 2 O 4 /MnO 2 obeyed a pseudo-second-order model. The isothermal experimental results indicated that the Langmuir model was fitted better than the Freundlich model, illustrating a monolayer adsorption process for Pb(II) onto NiFe 2 O 4 /MnO 2 . Meanwhile, the NiFe 2 O 4 /MnO 2 was easily separated from the solution by an external magnet within a short period of time and still exhibited almost 80% removal capacity after six regenerations. The NiFe 2 O 4 /MnO 2 is expected to be a new promising adsorbent for heavy metal removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yashan Huo,Yujia Tan,Fuchun Zhang,Wei Cui,Yixuan Wang,Zhihui He
It is anticipated that the advancement of efficient wave-absorbing materials across diverse frequency bands can meet the demands of covert communication and reduced radar detection, in particular, in the context of active camouflage in the era of electronic information warfare. In this study, a carbon-modified nickel ferrite (NiFe 2 O 4 ) hybrid fiber was successfully synthesized via electrostatic spinning and in-situ carbothermal reduction . The carbothermal reduction temperature can be used to adjust the carbon content of NiFe 2 O 4 /C hybrid nanofiber , thereby enabling the tuning of the conductance loss. Furthermore, the effective wave-absorption frequency range can be finely adjusted from the Ku-band to the C-band. This is attributed to a deliberate tailoring, which enables the achievement of synergistic and complementary effects of the magnetic and dielectric properties , influencing the impedance matching level of each NiFe 2 O 4 /C hybrid absorber. A large electromagnetic loss indicates a high-efficiency energy conversion, and thus, the excellent microwave absorption properties indicate that this material exhibits promising potential for integration into multifunctional micro–nano electromagnetic devices and weaponry.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Gao-Ren Li,Hongrui Zhu,Guixiang Ding,Huimin Xu,Chen-Jin Huang,Vyacheslav Fominski
The regulation of catalyst surface structure in catalytic process is the basis of regulating catalytic performance. For spinel materials, the common active phases on their surfaces in the oxygen evolution reaction (OER) are metal hydroxyl oxides, so promoting its surface reconstruction to form the metal hydroxyl oxide to improve the catalytic activity is one of the commonly used modification methods. In this work, amorphous P-doped NiFe2O4 (A-P-NFO) was successfully prepared by hydrothermal method and phosphating treatment. The amorphous structure can lead to a strong polarization effect in A-P-NFO, where electrons are attracted from the antibonding orbitals to the empty orbitals, thus lowering the average valence state of nickel and activating the Ni-O bond. Unlike other reported work on NFO, this work demonstrates that the lower Ni and Fe valence states are more favorable for catalytic activity. In addition, the amorphous structure keeps A-P-NFO in a metastable state, which will be conducive to the leaching of surface cations, accelerating the surface reconstruction of A-P-NFO during the OER process, and thus playing a key role in the improvement of the catalytic performance of OER. The synchrotron radiation, in-situ Raman spectra and DFT calculations demonstrate that the A-P-NFO is conducive to electron transfer and adsorption of electroactive species (OH*, O*, etc.) for OER. TheA-P-NFOexhibits the excellent OER catalytic performance under alkaline electrolyte conditions, achieving a low overpotential of 240 mV at 10 mA cm-2 and maintaining high catalytic stability over 48 h. Furthermore, its OER catalytic performance is superior to the recently reported catalysts of the similar type. The method of turning the catalyst into metastable state structure through P doping and amorphization strategy is expected to provide new research ideas and application prospects for improving the catalytic performance of similar catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Hui Lv,Zuoyi Xiao,Shangru Zhai,Jingai Hao,Yao Tong,Guoxiang Wang,Qingda An
The preparation of biomass-derived carbon electrode materials with abundant active sites is suitable for development of energy-storage systems with high energy and power densities. Herein, a hybrid material consisting of highly-dispersed nickel ferrite nanoparticle on 3D hierarchical carboxymethyl cellulose-derived porous carbon (NiFe 2 O 4 /CPC) was prepared by simple annealing treatment. The synergistic effects of NiFe 2 O 4 species with multiple oxidation states and 3D porous carbon with a large specific surface area offered abundant active centers, fast electron/ion transport, and robust structural stability, thereby showing the excellent performance of the electrochemical capacitor. The best performing sample (NiFe 2 O 4 /CPC-800) exhibited a superior capacitance of 2894F g −1 at a current density of 0.5 A g −1 . Encouragingly, an asymmetric supercapacitor with NiFe 2 O 4 /CPC-800 as a positive electrode and activated carbon as a negative electrode delivered a high energy density of 135.2 W h kg −1 along with an improved power density of 10.04 kW kg −1 . Meanwhile, the superior cycling stability of 90.2% over 10,000 cycles at 5 A g −1 was achieved. Overall, the presented work offers a guideline for the design and preparation of advanced electrode materials for energy-storage systems.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Xiaogang Zheng,Shiyu Tan,Lichun Dong,Shaobo Li,Hongmei Chen
Spinel nickel ferrite nanoparticles (NiFe 2 O 4 NPs) embedded in silica (NiFe 2 O 4 #SiO 2 ) was prepared to enhance the reaction performance of the dry reforming of methane in a coaxial dielectric barrier discharge reactor. NiFe 2 O 4 NPs of around 10 nm were effectively embedded in porous SiO 2 NPs (∼100 nm in diameter). Compared to the supported Ni-based catalysts (Ni/γ-Al 2 O 3 , Ni–Fe/γ-Al 2 O 3 , Ni–Fe/SiO 2 , and NiFe 2 O 4 ), the NiFe 2 O 4 #SiO 2 catalyst placed at the discharge zone exhibited excellent catalytic performance and high resistance to carbon formation during dry reforming under ambient conditions without the involvement of extra heat. The synergetic effect between the non-thermal plasma and the NiFe 2 O 4 #SiO 2 catalyst favored the conversion of CH 4 and CO 2 into syngas . The results indicated that the special structure of the as-synthesized NiFe 2 O 4 #SiO 2 catalyst was capable of restraining the aggregation of Ni–Fe alloy and suppressing the carbon formation in the reforming process.
研究领域:
化学工程
·
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Ying Xiong,Hui Luo,Yan Nie,Fu Chen,Weiyong Dai,Xian Wang,Yongzhi Cheng,Rongzhou Gong
In this study, multiwalled carbon nanotube (MWCNT) anchored on the surface of silica coated porous rodlike nickel ferrite (NiFe 2 O 4 @SiO 2 ) composite was fabricated, and its structure, composition, magnetic and electromagnetic (EM) wave absorption properties were studied. High-performance EM wave absorption properties of the ternary composite can be regulated by the coating thickness and the content of the absorber. The reflection loss (RL) was optimized to −67.8 dB at the matching thickness of 1.9 mm, and the effective absorption bandwidth (RL ≤ −10 dB) was 4.5 GHz (13.5–18 GHz) at the coating thickness of only 1.5 mm with the filler loading 40 wt%. The effective bandwidth can reach 5.3 GHz (12.7–18 GHz) at the coating thickness of only 2.2 mm with the filler loading 30 wt%. The broadband absorption, thin thickness, strong absorption and adjustable absorption properties endow NiFe 2 O 4 @SiO 2 /MWCNT composite with extensive prospects for EM wave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 34
·18138-18147
·
IF 8.867
Kaiqiang Zhou,Meiling Kang,Xiaoqing He,Zhensheng Hong,Zhigao Huang,Mingdeng Wei
Electrode pulverization, low electrochemical reaction kinetics and an unstable SEI layer have prevented the application of transition metal oxides with a conversion-type mechanism. Here, we describe gum arabic (GA) as a green and multi-functional binder for the fabrication of a NiFe2O4 nanotube (NFNT) electrode enabling predominant application in LIBs and NIBs. Firstly, it's revealed that the NFNTs–GA electrode possesses better mechanical properties of a higher friction coefficient, better elastic resilience and higher reduced modulus and hardness compared with a NFNTs–PVDF electrode. Secondly, the NFNTs–GA electrode can restrain the side reactions between the electrode and electrolyte, leading to the formation of a remarkably stable and thin SEI layer during discharge and charge processes. Thirdly, it is demonstrated by KPFM that the NFNTs–GA electrode possesses improved surface electrical properties and lower energy for the escape of electrons. Consequently, the NFNTs–GA electrode demonstrates much improved rate capability, cycling stability and columbic efficiency when used as an anode material for LIBs. It displays a stable capacity of 770 mA h g−1 which can be retained after 500 cycles at 0.5 A g−1. More importantly, the NFNTs–GA electrode exhibits a high initial coulombic efficiency of 73% (only 48% for the NFNTs–PVDF electrode) and enhanced electrochemical reaction kinetics with significantly improved oxidation and reduction peaks in the application of NIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）