JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jiyuan Chen,Feng Luo,Yuanshui Liu,Denghui Jiang,Linzhuang Xing,Zhimin Li
The lead-free BiFeO 3 -BaTiO 3 (BF-BT) based ceramics with large piezoelectric coefficient ( d 33 ) have been desired for promising applications in high-temperature fields. Herein, the 0.7Bi(Fe 0.9985 Mn 0.0015 )O 3 -0.3BaTiO 3 ceramics with different grain sizes are intentionally prepared by solid-state method, and a large d 33 (232 pC/N) and high Curie temperature T c (501 °C) are simultaneously achieved in the case of large grain size (>9 µm). X-ray diffraction and Rietveld refinement analyses indicate that these coarse-grained samples possess stronger rhombohedral distortion and enlarged lattice parameter compared to fine-grained samples, which make domain switching easier and give rise to the increase in strain. As a result, the piezoelectric and ferroelectric properties of such samples are significantly improved with increasing grain size from 3.05 µm to 9.07 µm. In addition, electric domain configuration and field-induced strain further prove that the strong piezoelectric response in coarse-grained samples is attributed mainly to enhanced non-180° domain mobility. This study reveals the origin of large piezoelectric response in coarse-grained BF-BT ceramics, and proposes an effective approach to improve the piezoelectric properties of BF-BT ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Lingfang Zou,Zhuan Li,Zonglong Gao,Fu Chen,Wenjie Li,Yong Yu,Yimin Li,Peng Xiao
Improving the piezoelectric activity of lead zirconate titanate (PZT) ceramics is of great importance for practical applications. In this study, the influence of Pr 3+ doping on the ferroelectric phase composition, microstructure, and electric properties on the A-site of (Pb 1-1.5x Pr x )(Zr 0.52 Ti 0.48 )O 3 is extensively investigated. A dense and fine microstructural sample is obtained with the introduction of Pr 3+ . The results show that the morphotropic phase boundary (MPB) moves to the rhombohedral phase region. The rhombohedral and tetragonal phases exhibit an ideal coexistence in the 4 mol.% Pr 3+ doped (PPZT4) samples. Lead vacancy and the reduction of the potential energy barrier are considered to be the key mechanisms for donor doping, which is upheld by the Pr 3+ doping. Combining the I-E hysteresis loops with the P-E hysteresis loops, it becomes apparent that both contribution maximums of the domain switching and residual polarisation are in PPZT4. Moreover, the thermal aging resistance of PZT is improved by doping, and the temperature stability is optimised from 83% in PZT to 96% in PPZT4. Hence, an appropriate amount of Pr 3+ doping can effectively improve the piezoelectric activity of PZT ceramics in the MPB area and optimise the performance stability of the material under application temperatures.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Xinghui Liang,Tae-Yeon Yu,Hoon-Hee Ryu,Yang-Kook Sun
O3-type layered materials are considered as promising cathode materials for advanced sodium-ion batteries owing to their low cost and high energy density. However, resultant cathodes undergo complex phase transitions and severe electrochemical corrosion during cycling, causing rapid capacity decay. To overcome these limitations, a heterostructured cathode, consisting of P2-Na 2/3 MnO 2 –coated O3-NaNi 0.5 Mn 0.5 O 2 that combines a high-capacity core and structurally stable shell, is rationally designed. A half cell with an optimized heterostructured cathode yields a high reversible capacity of 141.4 mA h g −1 at 0.1 C and exhibits excellent rate capability, with a capacity of 103.7 mA h g −1 at 15 C. In addition, the surface-modified cathode also shows improved cycling stability in both Na half cell (i.e. 85.3% capacity retention after 150 cycles at 1 C) and full cell systems (i.e. 83.6% capacity retention after 200 cycles at 3 C). The protective P2-Na 2/3 MnO 2 layer not only enhances the reversibility and air/thermal stability of the cathode, but also improves the electrochemical kinetics and reduces the charge transfer resistance. Hence, the sodium storage performance of O3-NaNi 0.5 Mn 0.5 O 2 is greatly improved by employing the proposed heterostructure design approach, which can be extended to other Mn-based layered oxide cathode materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Hongliang Li,Jingyang Wang,Sheng Xu,Aoyuan Chen,Hangyu Lu,Yan Jin,Shaohua Guo,Jia Zhu
Na-ion batteries (NIBs) are sustainable alternatives to Li-ion technologies due to the abundant and widely-distributed resources. However, the most promising cathode materials of NIBs so far, O3 layered oxides, suffer from serious air instability issues, which significantly increases the manufactural cost and carbon footprint because of the long-term use of dry rooms. While some feasible strategies are proposed via case studies, universal design strategies for air-stable cathodes are yet to be established. Herein, the air degradation mechanisms of O3 cathodes are investigated via combined first-principles and experimental approaches, with bond dissociation energy proposed as an effective descriptor for predicting air stability. Experimental validations in various unary, binary, and ternary O3 cathodes confirm that the air stability can indeed be effectively improved via simple compositional design. Guided by the predictive model, the designed material can sustain 30-day air-storage without structural or electrochemical degradation. It is calculated that such air-stable cathodes can significantly reduce both energy consumption (≈4 100 000 kWh) and carbon footprint (≈2200-ton CO 2 ) annually for a 2 GWh NIBs manufactory. Therefore, the fundamental understandings and universal design strategy presented open an avenue for rational materials design of NIBs toward both elemental and manufactural sustainability.
研究领域:
材料科学
·
能源存储
·
可持续技术
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Run Yuan,Yu Xia,Xu Wu,Can He,Yihe Qin,Changjun He,Xuewei Zhang,Na Li,Xuwen He
Catalytic oxidation is widely used in the treatment of refractory wastewater. However, catalytic oxidation has some problems such as high cost and limited production of radicals. To improve these, in this study, a new process of O 3 /H 2 O 2 /Fe-shavings which coupled catalytic ozonation and Fenton-like oxidation with Fe-shaving wastes reused, was used in the treatment of coking wastewater secondary biochemical effluent (CWSBE). The effects of the environmental conditions on the degradation of CWSBE were studied and the response surface method was used to optimise the parameters. The performances in organic pollutant removal from CWSBE were systematically analysed by a couple of methods such as gas chromatography mass spectrometry and three-dimensional fluorescence. The results showed that macromolecular organics were degraded into small molecules pollutants after treatment by the O 3 /H 2 O 2 /Fe-shavings process. At an ozone concentration of 27.5 mg/L, with the hydrogen peroxide concentration being 10.7 mmol/L, the reaction time 60 min, the initial pH value 3.6, and the pump speed 150 rpm, the COD removal degradation efficiency was 77.5%, and the effluent COD met relevant wastewater discharge standards in China (GB 16171-2012). The mechanism research showed that·OH plays an important role in the degradation of organic pollutants.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xiao-Dong Jian,Biao Lu,Dan-Dan Li,Ying-Bang Yao,Tao Tao,Bo Liang,Jin-Hong Guo,Yi-Jiang Zeng,Jia-Le Chen,Sheng-Guo Lu
Barium zirconate titanate (BZT) (Ba(ZrxTi1–x)O3) ceramics with Zr4+ contents of x = 5, 10, 15, 20, 25, and 30 mol % were prepared using a solid-state reaction approach. The microstructures, morphologies, and electric properties were characterized using X-ray diffraction, scanning electron microscopy, and impedance analysis methods, respectively. The dielectric analyses indicate that the BZT bulk ceramics show characteristics of phase transition from a normal ferroelectric to a relaxor ferroelectric with the increasing Zr4+ ionic content. The electrocaloric effect adiabatic temperature change decreases with the increasing Zr4+ content. The highest adiabatic temperature change obtained is 2.4 K for BZT ceramics with a 5 mol % of Zr4+ ionic content.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Science-Advanced Materials and Devices
·
2026
·Vol. 11
·期 3
·101222
·
IF 6.9
Dongxu Pan,Han Zheng,Li Zheng,Ling Zhang,Zhengfa Li,Qin Shi,Zhengdao Chen,Pengxi Xu,Yuyan Li
Capacitors with dielectrics as media have drawn great attention for the energy-storage application of high-power electronic systems. Sodium niobate (NaNbO 3 ) is the famous antiferroelectric with more phases and phase transitions, but without perfect recoverable energy storage density W rec and efficiency η . Herein, the relaxor ternary NaNbO 3 -LaFeO 3 -Sr(Fe 0.5 Nb 0.5 )O 3 ceramics are constructed by employing domain and domain wall engineering for integrating the merits of relaxors and antiferroelectrics. The phase transforms from orthorhombic P bcm to P mmn, and relaxor characters are revealed by the rotations of domains and the movements of domain walls. Particularly important, 0.88NaNbO 3 -0.096LaFeO 3 -0.024Sr(Fe 0.5 Nb 0.5 )O 3 demonstrates the great properties of high W rec as 2.645 J/cm 3 and super η as 80.7% at 230 kV/cm, less than the large electric breakdown strength E b of 235 kV/cm. These results suggest that NaNbO 3 -based ceramics are suitable for advanced capacitors, and the feasible strategy of domain and domain wall engineering is developed to provide novel energy storage dielectrics.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2025
·
IF 2.8
Wei Zeng-Feng,Zhang Yu-Meng,Liu Xue-Lian,Zhang Bi-Yang,Ni Li-Jie,Quan Heng
This study introduces a mussel-inspired superhydrophobic coating designed to enhance the long-term anticorrosion performance of copper in marine environments. Fluorine-free and fluorine-containing superhydrophobic coatings were developed by O 3 -assisted pretreatment, solution polymerization of dopamine, and the Michael addition reaction of dodecyl mercaptan and perfluorooctyl ethyl mercaptan. The ozone pretreatment allows dopamine to form a denser adsorption layer on the copper surface, which improves the long-term stability of the coating. The contact angles of the two coatings are 152.8° and 155.1°, respectively. Both types of superhydrophobic coatings demonstrate good corrosion inhibition performance, particularly the fluorine-containing superhydrophobic coating (99.98%). After 28 days of simulated seawater immersion, the fluorine-containing coating still maintains high corrosion inhibition efficiency (97.02%) and good hydrophobic characteristics (140.7°), which highlight its excellent long-term seawater corrosion resistance and stability. This study provides guidelines for designing durable superhydrophobic coatings.
研究领域:
材料科学
·
海洋工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Lianzheng Yu,Zhiwei Cheng,Kang Xu,Yu-Xin Chang,Yi-Hu Feng,Duo Si,Mengting Liu,Peng-Fei Wang,Sailong Xu
Biphasic hybridization of layered cathode materials for sodium-ion batteries (SIBs) is crucial to enhance storage performances. The synergistic effect of biphases is generally considered to underlie the enhancement, yet the in-depth mechanism underneath remains unclear, in particular at high-voltages (> 4.2 V, vs Na + /Na). Herein, a unique high-voltage-stable P2/O3 composite layered oxide-Na 0.85 Ni 0.34 Mn 0.33 Ti 0.33 O 2 with a specific proportion (P2:O3 = 24.8%:75.2%) is reported via tuning the amounts of Ti substitution in Na 0.85 Ni 0.34 Mn 0.66-x Ti x O 2 . Operando X-ray diffraction reveals that the biphasic Na 0.85 Ni 0.34 Mn 0.33 Ti 0.33 O 2 cathode successfully restrains the formation of O2 phase and undergoes completely reversible structural evolution of P2/O3–P2/P3–OP4/OP2 upon being charged to a high voltage of 4.4 V. Moreover, the interlocking effect between the phase boundaries is revealed to effectively mitigate the severe structural strain and large lattice volume change, thus further raising its structural stability under the high-voltage regions. Consequently, the obtained biphasic P2/O3-Na 0.85 Ni 0.34 Mn 0.33 Ti 0.33 O 2 cathode exhibits an excellent capacity retention of 80.6% at 1C after 200 cycles. More importantly, the full cell fabricated with hard carbon anode achieves a high energy density of 294.6 Wh kg −1 . These results highlight the excellent electrochemical performance of biphasic cathode materials and also grasp new insight into designing composite structure materials for SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Microstructures
·
2026
·Vol. 6
·期 2
·N
·
IF 8.5
Kai Li\u003Csup\u003E1,\u003C\u002Fsup\u003E,Qian Wang\u003Csup\u003E2,\u003C\u002Fsup\u003E,Yiqiao Zhou\u003Csup\u003E3\u003C\u002Fsup\u003E,Zehui Yang\u003Csup\u003E1\u003C\u002Fsup\u003E,Zuwen Zeng\u003Csup\u003E1\u003C\u002Fsup\u003E,Yihui An\u003Csup\u003E1\u003C\u002Fsup\u003E,Lang Bian\u003Csup\u003E2\u003C\u002Fsup\u003E,Zhenting Zhao\u003Csup\u003E1\u003C\u002Fsup\u003E,Haijuan Mei\u003Csup\u003E1\u003C\u002Fsup\u003E,Duoduo Zhang\u003Csup\u003E1\u003C\u002Fsup\u003E,Weiping Gong\u003Csup\u003E1\u003C\u002Fsup\u003E,Xudong Qi\u003Csup\u003E4\u003C\u002Fsup\u003E,Limei Zheng\u003Csup\u003E5\u003C\u002Fsup\u003E
To meet the escalating demands for high-performance piezoelectric materials in fields such as modern medical diagnostics, precision manufacturing, etc., we developed a ternary 0.555Pb(Ni1/3Nb2/3)O3-0.145PbZrO3-0.30PbTiO3 (PNN-PZ-PT) piezoelectric ceramic located at the tricritical point of rhombohedral, tetragonal and pseudocubic phases. This ceramic, with coexistence of multiple ferroelectric phases, demonstrates an ultrahigh piezoelectric coefficient d33 of 1190 picocoulombs per newton (pC/N) and a large relative dielectric constant εr of 9900. Analysis of the domain structure reveals irregular maze-like nanodomains with strong local disorder. These nanodomain structures exhibit excellent local piezoelectric response and polarization switching characteristics, thereby enhancing the alignment of polarization vectors during poling and ensuring the high stability after being poled. The tricritical point composition with disordered nanodomains can significantly enhance the contribution of polarization to macroscopic piezoelectric properties, offering a promising approach for developing ceramics with superior piezoelectricity.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2018
·
IF 2.687
Leilei Li,Jie Xu,Shuyao Cao,Qian Chen,Junting Liu,Emilia Pawlikowska,Mikołaj Szafran,Feng Gao
B-site complex perovskite Ba(Zr 0.1 Ti 0.9 )O 3 microcrystals at micron size with a plate-like shape was successfully synthesized using topochemical microcrystal conversion and molten salt method. A plate-like Bi 4 (Zr 0.1 Ti 0.9 ) 3 O 12 precursor was first synthesized by Zr 4+ substitution of Ti 4+ using molten salt. Then plate-like 4–9 μm Ba(Zr 0.1 Ti 0.9 )O 3 microcrystals with an average thickness <500 nm were synthesized by mixing BaCO 3 , Bi 4 (Zr 0.1 Ti 0.9 ) 3 O 12 , and KCl molten salt at 800 °C. Finally, the topochemical microcrystal conversion reaction between BaCO 3 and Bi 4 (Zr 0.1 Ti 0.9 ) 3 O 12 precursor was carried out. The results pave the way for fabricating plate-like B-site complex perovskite microcrystals.
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2013
·Vol. 92
·期 5
·851-860
·
IF 1.003
Zhenhua Pan,Qizhou Cai,Qiang Luo,Xinwei Li
The mechanism and kinetics of synergetic effect in TiO 2 /O 3 /UV process on H-acid degradation were investigated. The experimental results showed that H-acid removal rate of TiO 2 /O 3 /UV process was the highest among TiO 2 /UV, O 3 /UV and TiO 2 /O 3 /UV processes. The investigation of reactions with suitable active species scavengers confirmed that H-acid was mainly oxidised by ozone and holes on TiO 2 in the TiO 2 /O 3 /UV process. The recombination between holes and electrons in TiO 2 reduced in the presence of ozone, as indicated by fluorescence emission spectra. Moreover, the intermediates generated during H-acid oxidation in various processes were analysed by LC/MSD trap. It is proposed that H-acid was oxidised to polyhydroxy aromatics, benzene carboxylic acids and quinoids in the first step. Then, saturated aliphatics carboxylic acids were formed and mineralised to inorganic compounds through the Photo-Kolbe reaction. Finally, a kinetic study on TiO 2 /UV, O 3 /UV and TiO 2 /O 3 /UV processes was conducted and it was confirmed that both ozonation and photocatalytic activity were improved in TiO 2 /O 3 /UV process because of the synergetic effect.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）