IONICS
·
2024
·
IF 2.4
Yan Lichen,Chen Wei,Song Zehui,Xiao Li
A novel NiO/MnO 2 pompon-like hybrid structure was synthesized through a facile one-step hydrothermal in situ growth approach in this paper. NiO nanosheets grow on MnO 2 pompon-like microsphere to form typical hybrid structures which significantly increase the abundant active sites of electrode materials. The resulting NiO/MnO 2 electrode material exhibits an impressive specific capacity of 2706.1 F/g at a current density of 1 A/g. Remarkably, NiO/MnO 2 pompon-like hybrid structure shows excellent cycling performance and its capacity retention is maintained at 84.8% and the charge–discharge efficiency at 96% after 15,000 cycles. Even after undergoing 40,000 cycles, the electrode material maintains an outstanding charge–discharge efficiency of 95.2% with capacity retention of 69%, which revealing promising application as long-term electrode materials for 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
MATERIALS LETTERS
·
2020
·
IF 3.204
Zheng Liao,Licai Fu,Jiajun Zhu,Wulin Yang,Deyi Li,Lingping Zhou
Currently, the thin-film electrodes for energy storage devices commonly have complicated fabrication process and poor flexibility. In this case, the high strength and flexibility of the NiO thin films were fabricated by a simple tape-casting process combined heat-treatment time. The thin film can withstand repeated large-angle bending without damage. The film thickness can be regulated from 20 ~ 200 μm. Then, the NiO thin film has first been applied to the thermal battery cathode and shows excellent electrochemical performance. The actual discharge specific capacity could reach 543.6 mA h g −1 at the 0.1 A cm −2 with the cut-off voltage of 1.2 V. There is only one voltage platform during the discharge process. This high voltage accuracy electrode is suitable for precision equipment which is sensitive to voltage change. The simple and efficient fabrication process and excellent electrochemical performance make the flexible NiO thin film as a promising cathode material for thermal 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
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 42
·15181-15188
·
IF 4.099
Wenan Shang,Dongting Wang,Bingxue Zhang,Chunjie Jiang,Fengdong Qu,Minghui Yang
Fe-Doped NiO multi-shelled microspheres have been synthesized via a facile hydrothermal reaction. Various characterization techniques were introduced to investigate the structure and morphology of the as-prepared Fe-doped NiO multi-shelled microspheres. SEM and TEM observations showed that NiO microspheres are about 500 nm in diameter and with three shells. The Fe-doped NiO multi-shelled microspheres were investigated systematically as gas sensing materials for chemiresistive semiconductor-based gas sensors. The results showed that the 1.92 at% Fe-doped NiO (1.92Fe-NiO) multi-shelled microspheres exhibited enhanced gas sensing performance compared to the pure NiO multi-shelled microspheres. The gas response of 1.92Fe-NiO multi-shelled microspheres to 100 ppm butanol was 45.1 at 140 °C, which revealed a remarkable improvement over the pure NiO multi-shelled microspheres (6.80). The increased response of 1.92Fe-NiO multi-shelled microspheres may be attributed to the incorporation of Fe ions into NiO nanocrystals, which adjusted the carrier concentration and caused an increase in the oxygen species on the adsorbed surface. Therefore, the Fe-doped NiO multi-shelled microspheres should be a promising material for high performance butanol gas sensors.
研究领域:
材料科学
·
化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 33
·13962-13970
·
IF 3.288
Hengdong Ren,Jialin Ma,Jun Zhou,Xiangfeng Shu,Zhenying Liu,Yin Liu,Yan Zhao,Tao Ge,Fanfei Min,Ling Bing Kong
Anthracite-based carbon/Ni3Fe/NiO ternary composites were synthesized by using a microwave radiation method at a frequency of 915 MHz. Phase and elemental compositions of the composites were investigated by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). According to FESEM observations, Ni3Fe and NiO particles are uniformly implanted into grid-like porous structures and interlayers on the surface of anthracite-based carbon. The carbonization was realized at 700 °C, which could be attributed to the presence of a large number of polar molecules in anthracite that responded actively to microwave irradiation. The oxygen-containing functional groups in anthracite-based carbon provide multiple relaxation processes. Therefore, the composites exhibited a minimum reflection loss of −51.66 dB at 5.52 GHz, with effective absorption covering the S and C bands. Importantly, this result shows a facile method for preparing coal-based carbon/magnetic powder, which utilizes the rapid reaction of microwave radiation.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 10
·14102-14112
·
IF 2.478
Gao Ying,Zhang Jinniu,Leng Deying,Li Gang,Zhang Yuanyi,Wang Wei,Liang Qingfei,Chen Xiaorui,Lu Hongbing,Gao Jianzhi
Construction of high-performance gas sensors based on p-type metal oxides is still a big challenge. In this work, with the objective of improving the sensing properties of p-type NiO, a series of porous Rh–NiO heterojunction nanofibers with various molar ratios (Rh/Ni = 3%, 5% and 7%) are fabricated by a facile electrospinning technique. The effects of Rh content on surface area, oxygen species absorbing capability, as well as acetone sensing properties of NiO nanofibers are systematically investigated. Sensing results demonstrate that the Rh–NiO sensor with an optimal Rh amount of 5 mol% exhibits the highest p-type response of 70.10 to 200 ppm acetone at 225 °C, which is 37.9 times higher than that of pure NiO nanofiber sensor. Moreover, the 5 mol% Rh–NiO nanofibers also possess excellent acetone selectivity. The improved sensing response of Rh–NiO nanofibers is mainly attributed to the formation of ohmic contacts between Rh nanoparticles and NiO nanoparticles, facilitating the reduction of sensor resistance in air and the increase of chemisorbed oxygen capability. Chemical sensitization effect of Rh nanoparticles and increased BET surface area also contribute to the improved acetone response of Rh–NiO nanofibers.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yujun Guo,Jiayi Qu,Zhenkai Zhang,Zhenyue Liu,Chen Yue,Qiuying Chen,Zhiguo Yang,Yang Mu,Xiaoning Wang,Davoud Dastan,Xi-Tao Yin,Xiaoguang Ma
In this paper, ZnS/NiO p-n heterojunction microspheres were fabricated via a two-step hydrothermal approach. The sensing properties of composites with different ZnS contents were investigated by regulating the ratio of Zn. When containing 25 mol% ZnS, the ZnS/NiO nanosphere sensor achieved a response of 125. The response was improved by a factor of about 83.3 compared to pure NiO. The sensor functions optimally at a temperature of 225 ℃, and it possesses excellent selectivity, a rapid response/recovery time (49/44 s), and long-term stability. Therefore, this paper provides a hydrothermal method to prepare ZnS/NiO nanocomposites with heterojunction, specifically designed to detect n-butanol. After performing a series of characterizations, it was determined that the enhancement of the gas-sensitive properties could be related to the construction of ZnS/NiO heterojunctions and the increase in oxygen vacancies.
研究领域:
材料科学
·
化学传感器
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2020
·Vol. 8
·期 5
·2000008
·
IF 3.404
Chengrui Wang,Lei Zhang,Yuhai Dou,Luke Hencz,Lixue Jiang,Mohammad Al-Mamun,Porun Liu,Shanqing Zhang,Dan Wang,Huijun Zhao
Further commercial application of low-cost NiO-based anodes is hindered by their large volume expansion after full lithiation and relatively poor theoretical capacity. To improve these issues, transition metal (Fe, Co, or Mn)-modified triple-shelled NiO microspheres (TS-NiO) are successfully synthesized by using a hard template double-adsorption method. Among them, the Fe-modified TS-NiO (TS-NFO) exhibits an extraordinary lithium storage ability with high reversible capacity and outstanding cycling stability (2061.1 mAh g −1 after 800 cycles at 0.5 A g −1 ), which is the highest performing nickel oxide-based anode reported to date. The outstanding electrochemical performance of TS-NFO can be ascribed to its unique triple-shelled structure. The inner core of TS-NFO is composed of NiO and is encapsulated by two outer shells which are composed of a mixture of α-Fe 2 O 3 and NiFe 2 O 4 , resulting in a unique hollow triple-shelled structure (NiO@α-Fe 2 O 3 /NiFe 2 O 4 ). The void space between the triple shells leaves room for their volume changes during lithiation/delithiation, which improves the cycling stability. In addition, the introduced α-Fe 2 O 3 /NiFe 2 O 4 outer shells increase the energy density and reversible capacity due to a synergistically interactive effect.
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
·
2021
·Vol. 33
·期 1
·354-366
·
IF 2.478
Jin Jie,Dai Yatang,Lu Jinghua,Dai Xiaoqiang,Tie Ning,Ma Fei,Wang Wei,Pu Linyu,Zhang Huan
It is well known that the intelligent hybridization of active materials and the controllable recombination of nanostructures can significantly improve the electrochemical performance of pseudocapacitor electrodes. In this work, a NiO/NiCo 2 O 4 needle/sphere nanostructure was synthesized on the hydrochloric acid-activated Nickel foam by a simple hydrothermal method and measured the performance of it as an electrode material for supercapacitors. Field emission scanning electron microscope, transmission electron microscope, X-ray diffraction, and X-ray photoelectron spectroscopy were used to characterize the morphology and composition of the samples. The electrodes display a prominent specific capacitance (2447 F/g at the ampere density of 2 A/g) and remarkable cycling stability (85.2% capacity remained after 3000 cycles), owing to the unique needle/sphere composite architecture and the rational combination of active materials. The results demonstrate that the three-dimensional composite structure of NiO/NiCo 2 O 4 nanomaterials provides a large specific surface area for the electrode, which promotes the penetration of electrolyte ions and the transmission of electrons. This novel structured material will be promising in the application of supercapacitor electrode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMPHYSCHEM
·
2021
·Vol. 22
·期 17
·1785-1791
·
IF 3.102
Linghui Zhang,Zheng Hu,Hui Li,Qianqian Ren,Yishu Qiu,Jianqiang Qu,Shi Hu
Graphical NiO@Ru nanosheets with NiRuO 3 interface is constructed on Ni foam by two-step method of Cl − corrosion followed by Ru deposition. This self-supported electrode with low Ru loading amount exhibits excellent performance toward overall water splitting in alkaline due to intimate interface contact, low impedance, and high surface hydrophilicity. Electrocatalytic water splitting for hydrogen production from renewable energy requires the innovation of electrocatalysts with high activity and low cost. In this work, densely packed NiO@Ru nanosheets were fabricated on the surface of Ni foam through a two-step method of Ni(OH) 2 growth followed by Ru deposition. Through pair distribution function analysis from selected-area electron diffraction and X-ray photoelectron spectroscopy, the interface structure feature is revealed as a thin layer of perovskite NiRuO 3 sandwiched between NiO and Ru. The electrode exhibits high activity and durability for HER and OER, delivering a current density of 10 mA cm −2 at a voltage of 1.55 V for overall water splitting in 1 M KOH. The excellent performance can be attributed to the intimate interface contact of NiO and Ru in addition to low charge transfer resistance and super-hydrophilic surface structure, as verified by the electrochemical impedance spectroscopy and contact-angle measurement.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Haibo Ren,Cuiping Gu,Sang Woo Joo,Jingjuan Zhao,Yufeng Sun,Jiarui Huang
A NiO@rGO nanocomposite is prepared by a freeze-drying method combined with heat treatment. The morphology and structure are analyzed through X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectra, and X-ray photoelectron spectroscopy. The results clearly show that NiO nanoparticles are uniformly anchored on the surface of the rGO nanosheet. The gas-sensing performance of the nanocomposite is also investigated to detect hydrogen. The NiO@rGO sensor exhibits good gas-sensing performance with high sensitivity, fast response, good reversibility, and selectivity toward hydrogen. The relative response of the sensor to 1% hydrogen is 0.64, the response time is 28 s, and the recovery time is 142 s. The improved sensing performance is due to the effective electron transfer between the NiO nanoparticles and rGO nanosheet.
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
ChemElectroChem
·
2017
·Vol. 4
·期 10
·2563-2570
·
IF 4.136
Shi Yin,Yongqiang Wu,Qinqin Xiong,Haiying Qin,Hong Zhong Chi
Graphical Evolution of flower-like hierarchy : The growth process of hierarchical NiO is driven by surface free energy at the very beginning, and then re-crystallization according to Oster's curing mechanism. The hierarchical and mesoporous electroactive material is shown to be a promising alternative as an electrode material for supercapacitor applications. Hierarchical porous nickel oxide (NiO) has been synthesized through an ethanol-based hydrothermal method followed by a sintering process. The effects of hydrothermal duration on morphology, crystalline structure, and electrochemical performance are studied. With the prolongation of hydrothermal duration, the as-prepared NiOs appear in the form of scattered nanoflakes, then flower-like porous balls, and then solid microballs. In this period, poly-crystallization and re-crystallization are observed successively. It seems 120 minutes is suitable to form hierarchical NiO, 2 μm mesoporous balls composed of nanoflakes in all directions. The duration shows significant influence on charge-storage characteristics including reversibility, capacitance, and cyclic stability. The sample exhibits 678.4 F/g at 1 A/g discharge current density and maintains 94.8 % retention after 5000 cycles, suggesting a great prospect of the hierarchical NiO to be used as an electrode material for 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
ACS Sensors
·
2022
·
IF 9.618
Haoming Sun,Meng Cao,Pinhua Zhang,Xiaojing Tian,Manli Lu,Lulu Du,Kaifeng Xue,Guangliang Cui
Magnetism is a promising external intervention for gas sensitivity based on a heterogeneous interfacial structure caused by the regulation of the heterogeneous interface conductivity and the surface oxygen adsorption. In this study, Cu2O/NiO heterostructure-ordered nanoarrays were prepared with a two-dimensional (2D) electrodeposition in situ assembly method for H2S gas detection at room temperature under the action of a magnetic field. The nanoarrays were multibarrier structures with a strictly periodic structure that was greater than hundreds of microns in size. The experimental data confirmed that the response of 50 ppm of H2S based on the nanoarrays was improved by nearly 61% with a relatively weak magnetic field. Particularly at a low concentration (≤20 ppm), the effect of the magnetic field enhancement on the sensitivity was more obvious. We attributed the enhancement of the gas sensitivity with the magnetic field to the regulation of the Cu2O–NiO interface conductance and the surface oxygen adsorption. This study demonstrated that a magnetic field could significantly enhance the gas sensitivity based on heterostructures. Results of this study provide an important reference for the application of magnetism in gas detection and the design of new gas-sensitive materials.
研究领域:
材料科学
·
传感器技术
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）