JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 22
·20277-20284
·
IF 2.22
Wu Xiao-Hui,Tao Zheng-Xiong,Li Le-Zhong,Wu Chong-Sheng,Zhong Xiao-Xi,Wang Rui,Xiang Peng-Cheng,Li Ke-Lin,Lin Nan
In this work, Ni 0.7− x Zn 0.3 Co x Fe 2 O 4 ( x = 0, 0.05, 0.10, 0.15 and 0.20, NZCF) ferrites were successfully fabricated by solid-state reaction method. We have been more focused on the effects of cobalt-substituted NiZn ferrite on crystal structure, microstructure and magneto-electric properties. With gradual addition of cobalt content, since the smaller ionic radius and larger atomic weight of the cobalt, which leads to decrease lattice parameter ( a ) and enhance X-ray density ( d x ), respectively. The grain size ( D ) increases (4.86 ± 1.10 to 6.26 ± 1.67 μm). When x = 0.05, the initial permeability ( μ i ) of NiZnCo ferrites reaches the maximum value. The saturation magnetization ( M s) is firstly decreased slightly from 78.96 to 77.96 emu/g when x ≤ 0.10, then increased to 83.14 emu/g ( x = 0.15), ultimately decreased to 81.54 emu/g. Meanwhile, the coercivity ( H c) is dropped from 19.95 to 13.25 Oe when x ≤ 0.05, and stabilized at about 13.40 Oe when x > 0.05. From the dielectric spectrum, the real dielectric constant (ε′) exhibits typical relaxation-dispersion behavior with increasing frequency. The resistivity temperature spectrum also shows good performance: both dc resistivity ( ρ ) and activation energy ( E ρ ) increase with the Co substitution. Here, we have developed a NiZnCo ferrite when Co-substituted x = 0.05 with the highest permeability ( μ i , 123@10 kHz), higher saturation magnetization ( M s, 78.25 emu/g) and lowest coercivity ( H c, 13.25Oe), which is expected to be used in high-frequency capacitors and inductors.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Xinhao An,Chang Liu,Jiahe Liu,Junnan Liu,Yu Liu
Aqueous nickel-zinc (Ni–Zn) batteries have attracted wide attention due to their high energy density , high safety and low cost. However, the inferior cycling stability due to side reactions and the poor low-temperature electrochemical performance of aqueous electrolyte limit the large-scale application of Ni–Zn batteries . Herein, a nickel-cobalt-based metal-organic framework (NiCo-MOF) cathode is synthesized, which improves the cycling stability and rate performance of Ni–Zn batteries. Furthermore, a stable inorganic electrolyte with a freezing point lower than −112 °C by introducing NaClO 4 chaotropic salt additive into alkaline electrolyte is constructed. Benefiting from the reconstructing effect of ClO 4 ‐ on the water hydrogen bond network, the electrochemical stability window is widened from 1.56 V to 2.06 V, both oxygen evolution reaction (OER) on cathode and zinc corrosion on anode are inhibited. The batteries assembled with zinc foil as anode, NiCo-MOF as cathode (Zn||NiCo-MOF) and 4 M NaOH + 3 M NaClO 4 electrolyte provides a capacity of 96.5 mAh/g at 2 mA/cm 2 at −40 °C, corresponding to an 85.2 % capacity retention of that at 25 °C. In addition, the batteries operate stably at 5 mA/cm 2 for 7500 cycles with a specific capacity retention of 92.0 % at −40 °C.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Xinqiang Zhu,Yatao Wu,Yingzhuo Lu,Yangyi Sun,Qiang Wu,Yajun Pang,Zhehong Shen,Hao Chen
The unsatisfactory cycle life of nickel-based cathodes hinders the widespread commercial usage of nickel–zinc (Ni–Zn) batteries. The most frequently used methods to improve the cycle life of Ni-based cathodes are usually complicated and/or involve using organic solvents and high energy consumption. A facile process based on the hydrolysis-induced exchange of the cobalt-based metal-organic framework (Co-MOF) was developed to prepare aluminum (Al)-doped cobalt–nickel double hydroxides (Al-CoNiDH) on a carbon cloth (CC). The entire synthesis process is highly efficient, energy-saving, and has a low negative impact on the environment. Compared to undoped cobalt–nickel double hydroxide (Al-CoNiDH-0%), the as-prepared Al-CoNiDH as the electrode material displays a remarkably improved cycling stability because the Al-doping successfully depresses the transition in the crystal phase and microstructure during the long cycling. Benefiting from the improved performance of the optimal Al-CoNiDH electrode (Al-CoNiDH-5% electrode), the as-constructed aqueous Ni–Zn battery with Al-CoNiDH-5% as the cathode (Al-CoNiDH-5%//Zn) displays more than 14% improvement in the cycle life relative to the Al-CoNiDH-0%//Zn battery. Moreover, this Al-CoNiDH-5%//Zn battery achieves a high specific capacity (264 mAh g −1 ), good rate capability (72.4% retention at a 30-fold higher current), high electrochemical energy conversion efficiency, superior fast-charging ability, and strong capability of reversible switching between fast charging and slow charging. Furthermore, the as-assembled quasi-solid-state Al-CoNiDH-5%//Zn battery exhibits a decent electrochemical performance and satisfactory flexibility.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 7
·070539
·
IF 4.316
Runyue Qin,Yunpeng Pan,Zeang Duan,Huanhuan Su,Kailiang Ren,Wenfeng Wang,Yuan Li,Ning Xi,Yu Wang,Lu Zhang,Shumin Han
Nickel layered double hydroxide, Ni(OH)2, has been widely used as the cathode for nickel based battery systems. However, the currently commercialized β-Ni(OH)2 is limited by its low capacity. In contrast, α-Ni(OH)2 can give higher capacity, but it is challenging to stabilize in alkaline solution due to the conversion to β-Ni(OH)2. Herein, we use zinc doped Ni(OH)2 and control its spherical morphology to strengthen the stability of α-Ni(OH)2 in a nickel metal hydride battery system. With an optimal zinc doping content of 3 mol% for the spherical α-Ni(OH)2 (Ni-Zn3), the cathode shows the highest discharge capacity of 351.3 mAh g–1 at a current density of 70 mA g–1 (0.2 C) and superior rate performance, which even delivers 271.5 mAh g–1 at 5 C. More importantly, the durability of the Ni-Zn3 cathode is significantly enhanced, which maintains 81.7% after cycling 360 times, almost twice as long as that of pure α-Ni(OH)2. Studies show that the stabilized Ni–O bond and suitable aperture structure are mainly responsible for the advanced electrochemical properties of the Ni-Zn3. The results show that proper zinc doping spherical α-Ni(OH)2 with low-cost and high performance is an promising cathode material for nickel-based battery systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
·
2014
·Vol. 122
·期 1429
·768-771
·
IF 0.846
Xiaobing ZHOU,Young-Hwan HAN,Yongqiang ZHANG,Qian WANG,Jie ZHOU,Lu SHEN,Tongming HUANG,Weiming PAN,Changshu XIANG,Huiping TANG,Jaehyung LEE,So Ik BAE,Dong-Yeon LEE,Qing HUANG
Ni-Carbon nanotube (CNT)-Ni0.5Zn0.5Fe2O4 multiphase composites were sintered by spark plasma sintering (SPS) technique. Ni nanoparticles were in-situ formed due to the localized carbothermal reduction by CNTs and well distributed between grain boundaries in the composites. The electrical conductivity of the resultant multiphase composites was strongly dependent on the weight percentage of CNTs. In the SPS process, CNTs acted as “heating source” and improved the consolidation of the composites. The results indicate that the introduction of the CNTs can promote the sintering kinetics of the ferrite ceramics. However, the grain growth kinetics has been inhibited by SPS and the grain size becomes finer.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 36
·26813-26824
·
IF 2.779
Huang Sheng-Jiang,Li Le-Zhong,Tang Jian,Wang Rui,Xiong Zhe,Wu Xiao-Hui,Guo Hai-Shan,Chang Xin,Zhong Zi-Chen
NiZnCo ferrite has a wide range of applications in high-frequency devices, but its performance can be further improved to meet more requirements. In this work, Sc 3+ -substituted Ni 0.5 Zn 0.4 Co 0.1 Sc x Fe 2-x O 4 (NZCScF, 0 ≤ x ≤ 0.1) ferrite soft magnetic materials were successfully prepared by sol–gel self-propagating approach. After using Sc 3+ doping, the dielectric loss and dielectric constant are significantly reduced. The intensity of the coercive field decreases significantly with a rise in the Sc 3+ content. It is noteworthy that after adding Sc 3+ ions, the saturation magnetization can reach 94.27 emu/g, an increase of about 27%, and the initial permeability is increased by about 73%. In the high-frequency scope, the magnetic losses increase very little and up to 100 MHz the magnetic losses remain low. In conclusion, Sc 3+ substitution effectively improves the electromagnetic properties of NiZnCo ferrite and greatly enhances the saturation magnetization and initial permeability. It can serve as a guide for the material application of a series of high-frequency devices such as radio-frequency microwave devices.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Ran Wang,Jinzhen Huang,Xinghong Zhang,Jiecai Han,Zhihua Zhang,Tangling Gao,Lingling Xu,Shengwei Liu,Ping Xu,Bo Song
Developing earth-abundant and highly effective electrocatalysts for hydrogen evolution reaction (HER) is a prerequisite for the upcoming hydrogen energy society. Two-dimensional (2D) high-entropy metal phosphorus trichalcogenides (MPCh3) have the advantages of both near-continuous adsorption energies of high-entropy alloys (HEAs) and large specific surface area of 2D materials, which are excellent catalytic platforms. As a typical 2D high-entropy catalyst, Co0.6(VMnNiZn)0.4PS3 nanosheets with high-concentration active sites are successfully demonstrated to show enhanced HER performance: an overpotential of 65.9 mV at a current density of 10 mA cm–2 and a Tafel slope of 65.5 mV dec–1. Decent spectroscopy characterizations are combined with density function theory analyses to show the scenario for the enhancement mechanism by a high-entropy strategy. The optimized S sites on the edge and P sites on the basal plane provide more active sites for hydrogen adsorption, and the introduced Mn sites boost water dissociation during the Volmer step. Two-dimensional high-entropy MPCh3 provides an avenue for the combination of HEAs and 2D materials to enhance the HER performance, which also provides an alternative materials platform to explore and design superior catalysts for various electrochemical systems.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
PubMed
高影响因子
Electrocatalysis
·
2019
·Vol. 10
·期 5
·540-548
·
IF 2.311
Wei Shengliang,Qian Lihong,Jia Dongling,Miao Yuqing
The 3D flower-like Ni 0.6 Zn 0.4 O microspheres were prepared by calcination treatment of Ni–Zn LDHs (layered double hydroxides) that were obtained through a hydrothermal method. The yielded Ni 0.6 Zn 0.4 O microspheres were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET). The results showed that the calcinated microspheres of Ni 0.6 Zn 0.4 O still well maintained the flower-like architecture of Ni–Zn LDHs. The surface area, total pore volume, and average pore diameter of the Ni 0.6 Zn 0.4 O microspheres were obtained with the values of 36.106 m 2 g −1 , 0.111 cm 3 g −1 , and 5.676 nm, respectively. As modified anode active materials, the Ni 0.6 Zn 0.4 O microspheres exhibited excellent electrocatalytic performance and fast electrochemical kinetics for methanol oxidation in strong alkaline electrolyte where the high surface area of flower-like Ni 0.6 Zn 0.4 O microspheres provides the high contact probability between catalysts and reactants. The presence of Zn also improves the electron transfer within catalysts inside. Also, the Ni 0.6 Zn 0.4 O modified electrode maintained good electrocatalytic performance during the term of 36,000 s.
Diagram of the formation of the flower-like Ni 0.6 Zn 0.4 O microspheres and CVs of Ni 0.6 Zn 0.4 O/GCE (a, d), NiO/GCE (b, e), and ZnO/GCE (c, f) in KOH solution without (a–c) and with (d–f) 0.1 M methanol.
研究领域:
材料科学
·
电化学
·
催化化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Peijiang Liu,Zhengjun Yao,Jintang Zhou
Reduced graphene oxide/Ni 0.4 Zn 0.4 Co 0.2 Fe 2 O 3 (rGO/NZCF) nanocomposites were synthesized via facile hydrothermal reactions of rGO and metal nitrate. Transmission electron microscopy and scanning electron microscopy revealed that uniform NZCF particles with diameters of approximately 26.6 nm were homogeneously distributed on the rGO nanosheets . The electromagnetic properties and microwave absorption properties were determined of nanocomposites prepared with different rGO-to-NZCF weight ratios ( m rGO : m NZCF ). When the value of m rGO : m NZCF is 1:10, the rGO/NZCF nanocomposite with a thickness of 3 mm achieved a maximum reflection loss of −57.6 dB at 10.1 GHz and an effective adsorption frequency bandwidth of 4.2 GHz between 8.2 GHz and 12.4 GHz, which almost covers the whole X band. Therefore, the obtained composites are potential candidates for applications in microwave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2024
·
IF 2.5
Jitao Zhang,Xingkui Mu,Qingfang Zhang,Natallia Poddubnaya,Dmitry Filippov,Jiagui Tao,Fang Wang,Liying Jiang,Lingzhi Cao
Development of high-quality ferrites behaved enhanced properties via inclusion of ions in 3d n and 4f n series are desirable for efficient power conversion solid-state devices. Nevertheless, inadequate microscopic behaviors with complex chemistry in materials enables researchers to design and produce the macroscopic target device that remained rudimentary and mindless. In this work, the microscopic properties in nickel-zinc spinel ferrite series of Ni 0.8 Zn 0.2 Sm x Fe 2- x O 4 ( x = 0, 0.02, 0.04, 0.06, 0.08) encompassing XRD, SEM, EDS, VSM, FTIR and ESR were systemically characterized, and the evolutionary mechanism of the corresponding structural, micro-structure, elemental composition and distribution, magnetic, cations exchange, and micro-magnetic behavior was profoundly revealed. Under microscopic examinations, the optimum composition at x = 0.02 with well-arranged spinel structure, dense texture with expected elemental composition, favorable soft magnetic properties and micro-magnetic behaviors is evident. Fortunately, this optimum is in coincidence with the achievable maximum magneto-mechanical coefficient, even the macroscopic electric properties with stronger magnetoelectric (ME) interactions and higher power conversion efficiency (PE) in tri-layered ME samples as expected. Experimental results show that the eventual PE reaches its maximum of 75.67 % under R opt = 33kΩ for samples at x = 0.02, and exhibit a 2.24 times higher PE than that of sample without samarium substitution. These findings provide a holographic perspective to connect the microscopic beneficial effects of materials to bulk device that are promising for efficient power conversion solid-state electronics.
研究领域:
材料科学
·
磁性材料
·
固态电子学
·
功能陶瓷
·
能源转换技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 7
·1-9
·
IF 2.8
Li Wei,Dai Bo,Li Zhao,Yang Hongwei,Liu Guixiang,Xu Fang
A series of Ni x Zn 1− x Fe 2 O 4 ( NiZn, x = 0.15, 0.25, 0.35, 0.45, 0.65, 0.7, 0.8, 0.85) ferrites were prepared via a solid-phase sintering method. The microstructure, phase, and gyromagnetic properties of the NiZn samples were studied in depth. It was found that the lattice constants, density, and hardness of the samples gradually decreased with increasing Ni 2+ content. X-ray diffraction confirmed that all of the samples were in the spinel phase. Scanning electron microscopy indicated that the grain sizes were more uniformly distributed when x = 0.65. Raman analysis showed that the variation of Ni 2+ content affected the occupancy distribution of ferrite ions. The results indicated that Zn 2+ mainly occupied the A-site and that Ni 2+ mainly occupied the B-site. The coercivity ( H c ) of NiZn increased with increasing Ni 2+ content. Meanwhile, the saturation magnetization ( M s ) initially increased and then decreased. When x = 0.65, the total molecular magnetic moment started decreasing because of the decrease in the net A-site magnetic moment. The sample that had a composition of Ni 0.65 Zn 0.35 Fe 2 O 4 had the highest M s intensity with a value of 78.68 emu/g and a maximum value of 4 πM s = 4780 Gs.
研究领域:
材料科学
·
陶瓷
·
固体物理
·
磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
·
2014
·Vol. 122
·期 1430
·881-885
·
IF 0.846
Xiaobing ZHOU,Young-Hwan HAN,Jie ZHOU,Lu SHEN,Penchal Reddy MATLI,Jaehyung LEE,So Ik BAE,Dong-Yeon LEE,Qing HUANG
Ni-Carbon nanotube (CNT)-Ni0.5Zn0.5Fe2O4 multiphase composites were successfully prepared using microwave sintering (MWS) and spark plasma sintering (SPS) techniques. The obtained samples were characterized by scanning electron microscopy, electrical conductivity, and physical properties measurement system with vibrating sample magnetometer. The SPS prepared composites exhibited higher density, fine grain size, and to maintain favorable three-dimensional conductive network of CNTs compared with the microwave sintered (MWS) ones. Whether use MWS or SPS, both the density and the grain size are increasing with the CNT content increment. The increasing of density and grain size is the main contribution of the saturation magnetization increasing. In the composites of high content of CNTs (such as 5 wt %), the spinel structure of ferrite was totally destroyed, as indicated by a considerable decrease in the saturation magnetization. Interestingly, it is found that the Curie temperature increases with the increment of CNT content while the high saturation magnetization was maintained, which has implication that the multiphase ferrite composites will find application in a broad temperature range.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）