CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jitong Wang,Xinru Nie,Zhanhui Peng,Xiaoping Lei,Pengfei Liang,Zupei Yang,Xiaolian Chao
Lead-free antiferroelectric (AFE) NaNbO 3 (NN) is one of promising materials for dielectric capacitors, but the recoverable energy-storage density and efficiency get restrained owing to huge remanent polarization and limited dielectric breakdown field strength . In this work, a variety of NN based lead-free bulk (1- x )NaNbO 3 - x La(Mn 0.5 Ni 0.5 )O 3 (abbreviated as (1- x )NN- x LMN, x = 0, 0.05, 0.10, 0.15, 0.20) ceramics were designed using a solid-state synthesis method. Remarkably, an ultra-fast charge-discharge speed 47 ns and an acceptable recoverable energy-storage density W rec ~1.77 J/cm 3 with a high efficiency η = 77% were obtained under the E b of 200 kV/cm at x = 0.05. The superior energy storage performance is attributed to the regulation of domain size and voltage resistance by special ions substitution of A and B sites. This work not only proposes an efficient strategy to realize high recoverable energy-storage density and efficiency, but also provide an candidate material for application of advanced pulsed power capacitors.
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
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Chenxi Liu,Zhonghua Dai,Yuanyuan Zheng,Xujun Li,Muhammad Nasir Rafiq,Shinya Tsukada,Yu Cong,Tomoaki Karaki,Shun Zhou
Potassium niobate sodium-based ceramics with unique optical and electrical properties are used to develop transparent energy storage capacitors. The (1- x )K 0.5 Na 0.5 NbO 3 - x Bi(Sr 0.5 Hf 0.5 )O 3 (KNN-BSH, x = 0, 0.025, 0.05, 0.075, 0.1) ceramics are prepared and intensively investigated in this work. The results show that the average grain of KNN-BSH ceramics reaches a minimum of 0.64 μm, owing to the effective suppression of grain growth by (Sr 0.5 Hf 0.5 ) 3+ doping at the B-site. The KNN-BSH ceramics exhibit pseudo-cubic phases and are excellent relaxation ferroelectric ceramics. In particular, the total energy storage density ( W total ) of 0.95KNN-0.05BSH ceramic is 3.94 J/cm 3 , the recoverable energy storage density ( W rec ) is 2.85 J/cm 3 , and the discharge time ( t 0.9 ) is 0.92 μs, which is optimal for comprehensive performance. Besides, the band gap of 0.975KNN-0.025BSH reaches a maximum value of 3.13 eV with a high transmittance of about 57.3 % at a wavelength of 950 nm. The results indicate that KNN-BSH ceramics can be an alternative for transparent energy storage materials.
研究领域:
材料科学
·
电介质物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Biobased Materials and Bioenergy
·
2016
·Vol. 10
·期 3
·202-208
·
IF 0.635
Ma Xiao-Jing,Liu Xin-Ge,Zhang Hui-Min,Liu Qing,Zhu Hui-Xia,Yao Ri-Sheng
Efficient microbial lipid conversion from rice straw holocellulose hydrolysate (RSHH) by Cryptococcus curvatus O3 was first performed. Fermentation from RSHH without detoxification gave a lipid production of 6.72 g l–1, much higher than the result with glucose
(4.74 g l–1. RSHH detoxification by active carbon adsorption led to significant improvement of biomass and lipid production. The maximum biomass of 21.19 g l–1 containing 10.09 g l–1 of lipid could be achieved by using detoxified RSHH. The
accumulated lipids RSHH were mainly constituted by palmitic acid, stearic acid and oleic acid. Additionally, unsaturated and unusual long-chain fatty acid production was significantly increased. After culture parameter optimization, the highest lipid yield of 11.84 g l–1 and
lipid content of 54.07% were obtained with the detoxified RSHH. This research established an essential strategy for efficient microbial lipid accumulation from RSHH.
研究领域:
生物工程
·
微生物学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lihua Feng,Yufan Xia,Jinze Guo,Huiling Liu,Youchen Hao,Ziqi Tian,Xin Xiao,Lijie Feng,Chujun Sun,Shunmian Qi,Kuoqin Li,Yong Li,Yinzhu Jiang
Despite the considerable potential of O3-type layered oxide cathodes in sodium-ion batteries due to their high theoretical capacities, the rapid capacity degradation caused by high Na + diffusion barriers and irreversible phase transitions seriously hampers their practical application. Herein, we propose the La-doping strategy in O3-type layered oxide to decrease diffusion barriers and strengthen transition metal–oxygen (TM-O) bonds, thereby significantly improving the electrochemical performance. The strong La-O bonding facilitates highly reversible O3-P3 phase transitions during (de)sodiation and enhances the stability of lattice oxygen at high voltages. Specifically, the La-doped O3-type oxide exhibits impressive cycling stability, with the capacity retention increasing from 63 % to 80 % after 500 cycles at 1C. The full cell assembly with La-doped oxide as cathode and hard carbon as anode demonstrates a high energy density of 323.7 Wh kg −1 at 0.1C, with a capacity retention of 74.6 % after 300 cycles at 1C. This work provides new insights in La-doping to promote the commercial application of O3-type cathodes for sodium ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 17
·14273-14282
·
IF 3.289
Longwen Wu,Xiaohui Wang,Longtu Li
Lead-free (1 − x)BaTiO3–xBi(Zn2/3Nb1/3)O3 (x = 0.05–0.20) materials were fabricated via solid-state reactions. A pure perovskite pseudocubic structure is obtained for all compositions. Dielectric measurements reveal an intensified diffusion and relaxor-like characteristics from 5 mol% to 20 mol% Bi(Zn2/3Nb1/3)O3. Weakly coupled relaxor behavior is concluded from the exceptionally high activation energies of ∼0.20–0.22 eV from the Vogel–Fulcher model for x ≥ 0.10, which possibly results in the extremely low dielectric nonlinearity and extra slim polarization–electric field loops. An optimal discharged energy density of 0.79 J cm−3 with a high energy efficiency of 93.5% is achieved at 131 kV cm−1 for x = 0.15, which proves that the BaTiO3–Bi(Zn2/3Nb1/3)O3 material is a promising candidate for high energy storage applications.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Yang Yang,Honghao Deng,Liying Liu,Jiahong Pan,Ping Chen,Zhicong Shi
O3-type Cu/Fe/Mn-based layered oxides are regarded as promising cathode materials for sodium-ion batteries due to the abundance of elements in the Earth's crust and the imperative for large-scale energy storage. However, these materials still encounter some challenges, including low capacity and insufficient rate performance. In this study, Al-doped, cobalt-free, and nickel-free Na 0.9 Cu 0.18 Fe 0.3 Mn 0.52-x Al x O 2 (x = 0, 0.03, 0.05, 0.08) are successfully synthesized by using the solid-state method to introduce non-electrochemically active elements to stabilize the crystal structure and enhance the electrochemical performance. The impact of Al-doping is comprehensively analyzed by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), galvanostatic intermittent titration technique (GITT), and electrochemical impedance spectroscopy (EIS). Al-doping effectively enhances the diffusion coefficient of Na + , reduces the Jahn-Teller effect caused by Mn 3+ and mitigates the transition from O3 to P3 phase. Finally, it stops the partial phase transitions from O3 to P3, which can be found in pristine oxide without Al-doping during charge-discharge cycling. Notably, the Na 0.9 Cu 0.18 Fe 0.3 Mn 0.47 Al 0.05 O 2 electrode exhibits a reversible capacity of 123.89 mAh g −1 at 0.1 C, a capacity retention rate of 91.1 % after 200 cycles at 1 C, and a discharge capacity of 66.36 mAh g −1 at a high rate of 5 C.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 6
·1-12
·
IF 2.8
Tang Lanxin,Li Shuangchi,Wang Fang,Chen Yu
The binary perovskite-type compound (1 − x )BiFeO 3 – x BaTiO 3 (BF-BT) is considered as a promising high-temperature lead-free piezoelectric material due to its high Curie temperature ( T C > 400 °C) and better electromechanical properties. In this work, ternary lead-free piezoelectric ceramics with a chemical formula of (0.67 − x )BiFeO3–0.33BaTiO3– x Bi(Zn0.5Ti0.5)O 3 + 1 mol% MnO 2 (where x = 0–0.05) were prepared by the conventional solid-state reaction route. The effects of Bi(Zn 0.5 Ti 0.5 )O 3 introduction on the phase structures and microstructures, piezoelectric and dielectric properties, as well as impedance characteristics of BF-BT ceramics were investigated in detail. Firstly, all the samples synthesized exhibit a pure perovskite structure with the coexistence of rhombohedral ( R ) and tetragonal ( T ) phases, and the T phase content increases with increase in x . A small amount of Bi(Zn 0.5 Ti 0.5 )O 3 ( x ≤ 0.03) that were incorporated into the perovskite lattice of BF-BT can promote the grain growth of ceramics. Secondly, all samples were found with a notable relaxed phase transition behavior, T C of the system decreases with increase in x . The AC impedance spectra of the samples were fitted and analyzed according to the R-CPE equivalent circuit model, the electric impedance of the ceramics at high temperatures was mainly contributed by grain boundaries. Moreover, the dielectric relaxation activation energy of the samples firstly decreases and then increases with increase in x . Finally, the composition with x = 0.02 shows the optimized electrical properties among these samples, including T C = 454 °C, d 33 = 117 pC/N, k p = 23%, tan δ = 0.11, which are mainly benefited from the bismuth content compensation and the substitution of (Zn 0.5 Ti 0.5 ) 3+ for Fe 3+ at B-site reducing the valence change of Fe 3+ in BF-BT.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 29
·23116-23127
·
IF 2.779
Zhang Yu,Xiao Lei,Peng Sen,Li Qiang,Yi Tulin,Liu Weichun,Sun Yuxin
Ba[(Zn 1- x Mg x ) 1/3 Nb 2/3 ]O 3 ( x = 0 ~ 0.9) ceramics were prepared by the traditional solid-phase reaction sintering method. In this paper, the effects of MgO doping on the shrinkage, density, phase composition, crystal structure, microstructure, and microwave dielectric properties of Ba(Zn 1/3 Nb 2/3 )O 3 (BZN) ceramics were investigated. The phase constituents, crystal structure, and microstructure of the ceramics were studied by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM), and energy dispersive spectrometer (EDS). The results showed that Ba(Zn 1/3 Nb 2/3 )O 3 as the main phase, and the secondary phase Ba 5 Nb 4 O 15 was detected with high MgO content ( x > 0.3). However, the appearance of secondary Ba 5 Nb 4 O 15 directly led to the deterioration of the microwave dielectric properties of the samples. Ba[(Zn 1– x Mg x ) 1/3 Nb 2/3 ]O 3 ( x = 0.3) ceramics sintered at 1500 °C for 4 h possessed superior dielectric properties: ε r = 36.31, Q × f = 111,326 GHz, τ f = + 12.1 ppm/°C. Such the ceramics could be used to make dielectric resonators and stable oscillators.
研究领域:
材料科学
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Caiyan Yu,Linying Yang,Shuwei Sun,Di Chen,Yanfeng Yin,Hui Ying Yang,Ying Bai
Due to their high theoretical specific capacities and good structural compatibility, O3-layered oxides are considered as high-performance cathode candidates for sodium-ion batteries. However, serious side reactions and structural degradation during long-term cycling have greatly hindered their practical applications. Herein, O3-type NaNi 0.5 Mn 0.5 O 2 (NNMO) was prepared by partially substituting Ni 2+ with Cu 2+ and inducing CuO surface coating to enhance the structural stability without sacrificing the high capacity. In Particular, Cu 2+ incorporated at a molar ratio of 0.10 greatly improved the electrochemical performance of pristine NNMO. The NaMn 0.5 Ni 0.4 Cu 0.1 O 2 electrode exhibited a capacity retention of 64.5% after 300 cycles at 0.5 C. Microscopic and spectral studies revealed that the CuO coating layer suppressed detrimental side reactions upon cycling. Moreover, the bulk doping of Cu 2+ ultimately enhanced the structural stability by mitigating irreversible phase transitions. Hence, the integration of bulk Cu 2+ doping and CuO surface coating contributed to the increased structural stability and electrochemical performance of NNMO. The doping and coating dual-modification strategy established in this work effectively suppressed the side reactions and structural degradation of NNMO, and this work provides new insight into the effective design of electrode microstructures for use in high-performance batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Ningyun Hong,Kang Wu,Zhengjun Peng,Zenghu Zhu,Guofeng Jia,Min Wang
O3-type layered transition metal oxides have shown great promise as high-capacity cathode materials for sodium-ion batteries in large-scale energy storage, due to their low cost and the abundance of sodium resources. However, the limited interlayer spacing and the unstable structure of the O3 phase result in inferior cycling stability and poor rate capability, which could even hinder their practical application process. Hereby, we present that doping with nonelectrochemically active Al in NaAlx(Ni0.5Mn0.5)1–xO2 (x = 0, 0.02, 0.06, 0.1) can effectively alleviate these issues. Among these materials, materials with x = 0.02 exhibited the best electrochemical behavior with improved capacity and better cycling property than other materials. Specifically, the discharge capacity of a 2 mol % Al-doped material possesses 63.2% capacity retention after 200 cycles at a current density of 240 mA g–1, which is 21.4% higher than that in NaNi0.5Mn0.5O2. In addition, a 2 mol % Al-doped electrode also shows outstanding rate capability and delivers 90 mAh g–1 at a high rate of 480 mA g–1, compared to only 67 mAh g–1 for that of the pristine one. X-ray diffraction (XRD), cyclic voltammetry (CV), and galvanostatic intermittent titration technique (GITT) analysis elucidated that the introduced Al dopant can effectively improve the structural stability and promote kinetics of Na+ diffusion mobility. Therefore, the strategy of doping inactive aluminum elements for optimizing the electrochemical performance of NaNi0.5Mn0.5O2 was verified, which could also open an avenue for the design of other O3-type sodium cathode materials.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Yutong Nong,Xiaowei Wang,Minghuang Li,Jingyi Zhang,Weijie Ji,Yi Zhao,Lei Cheng,Xing Ou,Lei Ming,Xiaoming Yuan,Jiafeng Zhang,Bao Zhang,Lei Dong,Jianmin Feng,Ruirui Zhao,Zhiyuan Sang,Ji Liang
O3-type layered oxides are promising cathode materials for sodium-ion batteries due to their easy synthesis and high sodium content. However, complex phase transitions and poor air stability limit their practical applications. Introducing sodium deficiency suppresses reactions with air and improves phase stability, but often at the cost of significantly compromising the sodium storage capacity. Herein, we present a hierarchical composition regulation strategy to achieve radial concentration control of sodium in the O3-type layered oxides, constructing radially distributed sodium gradients. The gradient Na content structure not only can alleviate the volume changes caused by the O3–P3 phase transition, which minimizes the degradation of electrochemical performance during cycling, but also suppresses Na+/H+ exchange. This ensures enhanced air stability, improved kinetic performance, and cycling stability. The modified cathode material exhibits a capacity retention rate of 93.37% after 400 cycles at 5 C. When exposed to 82% relative humidity, CO2 concentration of 3044 ppm for 10 h, it still maintains a specific capacity of 84.9 mA h g–1 after 300 cycles at 1 C, with a capacity retention rate of 77.27%. This work provides a strategy for radial sodium concentration control, contributing to the development of high-performance and air-stable O3-type sodium-ion battery cathode materials.
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
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
·
2023
·
IF 1.5
Jialong Zhu,Kaixuan Fang,Mengdi Zhang,Huixuan Chen,Mengfei Zhou,Xiaofang Sun
In this study, the kinetics and mechanism of UV/O 3 synergistic oxidative digestion of dissolved organic phosphorus (DOP) were investigated, focusing on the ozone direct oxidation and hydroxyl radical oxidation parts of glufosinate and triphenyl phosphate (TPhP). The p-chlorobenzoic acid (p-CBA) was selected as the probe compound, and two kinds of reaction kinetic models were proposed by competitive kinetic method with R ct according to the different scale of rate constants of hydroxyl radical oxidation. Under the condition of weakly alkaline (pH = 9.0) and weakly acidic environment (pH = 5.0), the second-order rate constants of glufosinate and TPhP was determined indirectly to be k o 3/glufosinate = (2.903 ± 0.247)M −1 s −1 and k o 3/TPhP = (3.307 ± 0.204) M −1 s −1 by ozone direct oxidation, and k ·OH/glufosinate = (1.257 ± 1.031) × 10 9 M −1 s −1 and k ·OH/TPhP = (7.120 × 10 8 ± 0.963) M −1 s −1 by hydroxyl radical oxidation, respectively. The comparison of the contribution levels of the two parts to the digestion process showed that the contribution levels in the digestion of glufosinate and TPhP processes both the contribution of ·OH were higher than those of ozone, 86.3% and 72.6%, respectively.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）