JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 16
·13925-13930
·
IF 2.324
Li Tianjing,Shi Qingle
In this paper, explain a new relationships between Bi 3+ content, the phase crystal, microstructure and conductivity for Sm and Bi co-doped Ce 0.8− x Sm 0.2 Bi x O 1.9−1/2 x ( x = 0, 0.05, 0.1, 0.15, 0.2) electrolytes prepared by co-precipitation method. The XRD patterns showed that this compounds exhibit a fluorite-type cubic structure after the samples calcined at 700 °C for 4 h and the cell volumes of increased when the Bi content increased. In addition, for the samples sintered at 1400 °C for 4 h, the Bi doping improves the relative density, the grain size and the average thermal expansion coefficient (TEC). More in details, the relative density and TEC increase with the Bi content. Form the AC impedance spectroscopy measurements, the conductivity of the sintered samples is found to improve with the increasing of Bi content (for x ≤ 0.15), which is ascribed to the increasing of the number of oxygen ion vacancies and the increase in the unit cell volume. However, the conductivity decreases when the Bi content is further increased (0.15 < x ≤ 0.2), which is ascribed the reduction of the number of free oxygen vacancies. The highest conductivity at 800 °C is 5.6 × 10 −2 S/cm and the activation energy is 0.83 eV for Ce 0.65 Sm 0.2 Bi 0.15 O 1.825 , indicating that this would be a promising electrolyte for the intermediate temperature-solid oxide fuel cell applications.
研究领域:
材料科学
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无机非金属材料
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固态离子学
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能源材料
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燃料电池
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
·
2018
·
IF 7.9
H.R. Jiang,W. Shyy,M.C. Wu,R.H. Zhang,T.S. Zhao
In this work, a bi-porous graphite felt electrode is prepared by a simple yet effective catalytic etching method for vanadium redox reflow batteries (VRFBs). The primary pores, ∼100 μm in size and formed by voids between interconnected carbon fibers, act as the macroscopic pathways for electrolyte flow, while the secondary pores, ∼200 nm in size and formed onto carbon fibers, increase the active surfaces for electrochemical reactions. The Brunauer-Emmett-Teller results show that the specific surface area of bi-porous graphite felt is 17.73 m 2 g −1 , which is 7 times larger than that of the original graphite felt. The cyclic voltammetry and electrochemical impedance spectroscopy tests demonstrate the higher peak currents, smaller peak potential separations and lower charge transfer resistances of the bi-porous graphite felt than the original graphite felt. Battery tests show that the VRFB with the bi-porous graphite felt electrode achieves an energy efficiency of 87.02% and an electrolyte utilization of 84.07% at the current density of 200 mA cm −2 , which are 17.90% and 38.91% higher than that with the original graphite felt electrodes. More importantly, the battery can be operated at the high current densities of 300 and 400 mA cm −2 with the energy efficiencies of 82.47% and 77.69%, among the highest performance in the open literature. All these superior results demonstrate that the bi-porous graphite felt prepared in this work offers a promise to replace conventional mono-scale porous graphite felt electrodes for VRFBs.
研究领域:
储能技术
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电化学
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材料科学
·
可再生能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2017
·
IF 3.471
Jing Zhou,Li Ding,Fuqiang Bi,Bozhou Wang,Junlin Zhang
5,5′-bis(2,4,6-trinitrophenyl)-2,2′-bi(1,3,4-oxadiazole) (TKX-55) was synthesized through an oxidation-chloridization-condensation-cyclization sequence. Thermal decomposition behavior and non-isothermal decomposition reaction kinetics of TKX-55 were investigated by the differential scanning calorimetry and thermogravimetric analysis (DSC-TG) methods The research of decomposition mechanism of the molecule was further carried out through in-situ FTIR spectroscopy technologies. The experiment results showed that the enlarged conjugated system has a marked effect on the thermal stability and the picryl moiety is much more stable than the 1,3,4-oxadiazole moiety during the heat-up process, indicating that the decomposition process is mostly likely to initiate from the ring-opening reaction of 1,3,4-oxadiazole moiety which is supported by the computational scanning result of potential energy surface.
研究领域:
含能材料
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热分析
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物理化学
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炸药化学
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反应动力学
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2020
·Vol. 7
·期 1
·146-155
·
IF 5.797
Chen Zhu,Jian Zhang,Hongwei Ming,Lulu Huang,Yuanyue Li,Tao Chen,Di Li,Baoli Zhang,Jingtao Xu,Xiaoying Qin
Based on the calculated results of band structures and density of states, Bi doping is used to adjust its carrier concentration in order to obtain n-type PbTe materials with high power factor. Then, coherent nanophase Cu 1.75 Te is in situ formed in the n-type PbTe matrix, which can simultaneously optimize the thermal and electrical properties. As a result, at a relative lower temperature than other reports, the highest ZT value of 1.4 is obtained at 623 K for the nominal Pb 0.995 Bi 0.005 Te+0.86 wt% Cu 1.75 Te sample. More importantly, the ZT hold a higher value in the broad temperature; especially, ZT value is about 1.2–1.4 in the temperature range of 573–773 K, which is beneficial to the significant average ZT value ZT ave ∼ 0.9 in the temperature range of 300–773 K. These results indicate that it is an effective and feasible method to enhance the thermoelectric properties via synergistic modulation of electrical and thermal transport properties by element doping and in situ coherent nanophase.
研究领域:
材料科学
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热电材料
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纳米材料
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能量转换
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Reyihanguli Ababaikeri,Ying Sun,Xingchao Wang,Xiaofei Li,Maohua Li,Fei Zhang,Yan Li,Pengyue Wang,Jixi Guo,Yali Cao
Metallic bismuth as a promising anode for alkali metal-ion batteries has attracted great attentions because of superb volumetric capacity (3800 mA h cm −3 ) and suitable working voltage plateaus (∼0.5 V). However, Bi anode suffers from large volume change during repeated cycling, resulting in poor cycle performance. In this contribution, Bi nanoparticles embedded in N-doped carbon materials (Bi@N-C) are designed and fabricated by one-step pyrolysis method. Thanks to the synergistic effects of Bi nanoparticles and the N-doped carbon framework, the elaborately designed Bi@N-C can not only reduces the ion/electron diffusion pathways and enhances the reaction kinetics, but can also availably inhibits the agglomeration of Bi particles, and effectively alleviates the volume fluctuation. As an anode material , the Bi@N-C exhibits advanced rate capability (219 mA h g −1 at 5 A g −1 ) and excellent stable cycle ability (307 mA h g −1 at 1 A g −1 , after 400 cycles) in sodium-ion batteries. Furthermore, the Bi@N-C anode also exhibit good stable cycle ability (240 mA h g −1 at 1 A g −1 , after 70 cycles) in potassium-ion batteries. This study provides a facile and environmentally friendly way for fabricating high performance Bi anodes towards SIBs and PIBs.
研究领域:
材料科学
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储能
·
电化学
·
纳米材料
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电池技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yaqing Wang,Qiujun Wang,Di Zhang,Zhaojin Li,Huilan Sun,Qujiang Sun,Bo Wang
Solid-state lithium metal batteries (SSLMBs) are considered to be the next generation of high safety and high energy density storage device. However, the accidental lithium dendrites growth and the solid-solid contact problem have seriously hindered the development of their commercialization. Therefore, it is of great significance to develop high-modulus electrolytes to suppress lithium dendrites growth and achieve close-knit contact between electrolyte/electrodes. Herein, we utilize the natural settlement of Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) during in-situ polymerization method of polyester-based trimethylolpropane trimethacrylate (TMPTMA) and 1,6-hexanediol diacrylate (HDDA) monomer and the based on the selective adsorption of glass fiber to construct an asymmetric bi-functional composite electrolyte membrane (A-P(PF) 1 TH-X%LLZTO). To match the high voltage cathode material, the polymer electrolyte matrix containing ploy (vinyl carbonate) (PVC)/lithium difluoro(oxalato) borate (LiDFOB) was introduced into the pore of the cathode material to construct stable cathode electrolyte interphase (CEI) layer on the surface of the active material. The characterization of Li solid NMR spectra shows that the ceramic oxides provide effective pathways for the Li + conduction between the asymmetric electrolyte and the lithium anode. Symmetric Li Li cells exhibit low charge voltage polarization, can operate stably at 0.2 mA cm −2 for over 700 h, and can increase the critical current density to 2.1 mA cm −2 . The lithium metal batteries (LMBs) assembled with high voltage LiCoO 2 cathode has the capacity retention rate of 99.62 % after 500 cycles (remained 118.08 mAh g −1 at 1C). Such excellent electrochemical properties are attributed to the establishment of asymmetric electrolytes that can form inorganic component-rich SEI layer on the side of Li metal. This work demonstrates an effective interface engineering strategy that can simultaneously realize the interface stability of the cathode and anode electrode/solid electrolyte, which shows great potential for promoting the development of LMBs.
研究领域:
材料科学
·
电化学
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能源存储
·
固体离子学
·
界面工程
✓ 已验证
DOI
高影响因子
ACTA MATERIALIA
·
2026
·
IF 10.7
Zhengniu Pan,Sijing Zhu,Yi Wang,Zhen Fan,Jisheng Liang,Shiyuan Zhao,Jun-Liang Chen,Zhongwei Zhang,Zhixiang Zhang,Qi Zhou,Jie Gao,Huaizhou Zhao,Lei Miao
The n-type Mg 3+δ (Sb,Bi) 2 ‐based system has recently emerged as a breakthrough class of thermoelectric (TE) materials, drawing considerable interest for its eco‐friendly composition and potential to replace conventional commercial counterparts. However, the precise regulation of grain boundaries in Mg-based materials—akin to wielding an accurate scalpel—so as to extremely optimize thermoelectric performance and device properties remains ill-defined. In this study, the incorporation of Ga into the Mg 3 (Sb,Bi) 2 matrix via high‐energy ball milling (HBM) and spark plasma sintering (SPS) yielded an ultralow lattice thermal conductivity of 0.41 W m -1 K -1 at 300 K, a superior figure of merit ( ZT ) exceeding 1.84 at 673 K, and a high average ZT ( ZT avg ) of 1.55 across 300—773 K. The lattice thermal conductivity of Ga‐modified Mg 3+δ (Sb,Bi) 2 is markedly reduced over the entire temperature range, primarily due to the enhanced Kapitza thermal resistivity (ρ Kapitza ) resulting from the introduction of a liquid‐like phase at grain boundaries (GBs), which strengthens phonon scattering. while, Ohmic-like metal–semiconductor junctions form at the interfaces between the Ga/Bi secondary phases and the Mg 3+δ (Sb,Bi) 2 matrix lead to superior power factor. The high performance of Ga‐Mg 3+δ (Sb,Bi) 2 enabled a two‐pair module based on Mg 3.2 Ga 0.04 Sb 1.5 Bi 0.49 Te 0.01 / MgAgSb to achieve a conversion efficiency ( η ) of ∼6.0% at ΔT = 300 K. As a result, this work demonstrates significant theoretical and practical value in areas such as thermal management and thermoelectric material design.
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2026
·Vol. 16
·期 4
·264
·
IF 2.9
Tengbo Chen,Yuxi Yu,Haoran Gao,Ronggui Zhang,Zhong Luo,Shuyuan Zhao
Bi-doped rare-earth iron garnet (Bi:RIG) single crystals are the core of optical isolators, and demand for them is surging due to the development of artificial intelligence (AI) technology. In this work, bismuth-doped terbium iron garnet (Bi:TbIG) single crystals with a composition of Bi0.86Tb2.14Fe5O12and a size of 37 mm were successfully grown by the top-seeded solution growth (TSSG) method using a lead-containing flux system. These crystals exhibited a regular rhombic dodecahedron morphology enclosed by the {110} plane, and a growth rate of 0.018 mm/h perpendicular to the {110} planes. Systematic characterizations revealed that the crystals exhibited good compositional homogeneity, with no obvious Fe, Tb and Bi segregation from center to edge. Rocking curve tests presented a full width at half maximum of 172 arcsec. X-ray photoelectron spectroscopy (XPS) results demonstrated that Fe exists exclusively in the +3 valence state without detectable Fe2+, whereas Tb is present in the +4 valence state. In addition, O was lattice O2−, without obvious defects. Magneto-optical tests indicated that the uncoated TSSG-grown Bi:TbIG crystals had 71% transmittance in the 1200~1600 nm waveband, and a Faraday rotation coefficient of 0.132°/μm at 1310 nm. The 11 × 11 mm samples exhibited an extinction ratio stably above 40 dB. The 349 μm thick samples meet the application requirements of miniaturized optical isolators. This study verifies the feasibility of TSSG for growing Bi:TbIG single crystals, offering a new technical route for Bi:TbIG growth with potential value for practical application.
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Xiaoyan He,Yanling Liang,Xiaosu Cheng,Hui Fan,Zhentong Zhu,Yuxuan Zhang,Yihao Guo,Jing Li,Yuanyuan Lu,Zhiqiang Wang,Xiaoquan Lu
PPy/SrTiO 3 -Bi composites let biomass hydrogel evaporators combine photothermal conversion with photocatalytic degradation. • Adsorption interception coupled with photocatalytic degradation gives the evaporator excellent VOC removal efficiency. • The evaporator achieves a VOC removal efficiency of up to 99.3% under one-sun irradiation. • Under the same illumination condition, a high-water evaporation rate of 3.13 kg m −2 h −1 is also obtained. • This evaporator exhibits excellent salt resistance and water purification capabilities. Solar-driven interfacial evaporation technology has become an important approach to addressing the global water crisis due to its advantages such as being green and sustainable. However, due to the inherent volatility of volatile organic compounds (VOCs), the technology still faces severe challenges in removing VOCs from distilled water. In this paper, a biomass-based hydrogel evaporator (PSBH) integrating solar steam generation and photocatalytic degradation was constructed by immobilizing polypyrrole (PPy)-coated SrTiO 3 -Bi composites into an acrylamide (AM)/Kapok fibres composite hydrogel network via a one-pot method. This evaporator can effectively remove phenol (a typical VOC) that is volatilized along with water vapor, while achieving efficient solar-powered water evaporation. The introduction of kapok fibres endows AM hydrogels with superior structural stability and water transport efficiency, while reducing the energy required for the evaporation process, thereby enhancing the overall water transport and evaporation performance. PPy-coated SrTiO 3 -Bi composites achieve photothermal-photocatalytic synergy. The introduction of semimetal Bi nanoparticles enhances visible-light absorption and promotes spatial charge separation through its dual functional role as an electron trap and a plasmonic hot-electron donor, imparting excellent photocatalytic activity and photothermal conversion efficiency. Under 1 sun illumination, the interfacial evaporation rate can reach 3.13 kg m −2 h −1 . Meanwhile, the removal efficiency of a typical VOC (phenol) reaches 99.3%, enabling the simultaneous achievement of highly efficient seawater desalination and VOC removal. It is worth noting that the evaporation rate of this evaporator can still reach 2.22 kg m −2 h −1 in 20 wt% salt solution concentration, showing excellent environmental tolerance. This design offers a feasible strategy for multifunctional photothermal materials and a novel solution to VOCs pollution in solar interfacial evaporation. Download: Download high-res image (209KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
CHEMICAL PAPERS
·
2025
·
IF 2.5
Zhao Jinwen,Wang Le,Liu Xiaolan,Zhu Yanqin,Yin Qinhong
Nanozymes have been valuable tools in colorimetric analysis due to their ease of production, long-term stability, and adaptable enzymatic activity, enabling them to induce color changes in substrates. This study presents a straightforward enzyme-based colorimetric sensor for morphine ( MOR ) detection. The sensor utilized the laccase-like activity of a self-synthesized Cu, Bi-phosphotungstic acid ( Cu, Bi-PTs ) nanozyme, which was loaded with phosphotungstic acid, copper, and bismuth through a one-pot microwave method. This nanozyme was capable of catalyzing the coupling reaction of 2,4-dichlorophenol ( 2,4-DP ) and 4-aminoantipyrine ( 4-AP ), leading to the conversion of colorless phenolic compounds into red-colored products. The method demonstrated a detection limit of 1.88 μg/mL for MOR and a linear dynamic range from 3.333 to 400 μg/mL. The calibration curve, given by the equation y = 0.0015x + 0.4081, exhibited excellent linearity (R 2 = 0.9914), confirming the method's reliability for quantitative analysis. The developed colorimetric method was successfully applied to real samples, showing relative standard deviations (RSD) between 1.4 and 4.3% for MOR detection. These results demonstrated that the method was sensitive, cost-effective, and rapid, making it suitable for the efficient determination of MOR .
研究领域:
纳米技术
·
分析化学
·
生物传感器
·
环境与药物分析
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Junyi Gong,Jie Hou
Meliorating the particle surface could alter the surface properties, thus potentially enhancing the electrode reactions. In this assignment, a recovery of the intrinsic nanostructure at La 1.2 Sr 0.8 Ni 0.5 Mn 0.5 O 4+δ (LSNM) particle surface with the elimination of the bi-shell nano-surface layers caused by dopant segregation was attempted based on the lower powder calcination temperature and introduction of A-site cation deficiency. The A-site deficient (La 1.2 Sr 0.8 ) 0.9 Ni 0.5 Mn 0.5 O 4+δ [D-LSNM], accompanied with no phase separation on surface, is successfully obtained, in which the smaller particles and more oxygen vacancies would promote the electrocatalysis, oxygen reduction reaction and oxygen migration, thus boosting the electrode reactions. The surface nanostructure-recovered D-LSNM cathode achieves a preeminent performance with power output of 1547 and 1030 mW cm −2 at 700 and 600 °C, being better than other K 2 NiF 4 -type R-P cathodes in the literature. Anyhow, the preferable cell performance along with the fine stability suggests that the original surface-nanostructured D-LSNM is a promising cathode alternative for low-temperature proton-conducting solid oxide fuel cells. This work provides a new kind of reverse thinking to design highly catalytically active cathode materials via the restoration of the intrinsic nanostructure at surface, which would be beneficial to the related electrocatalytic fields.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池
✓ 已验证
DOI
高影响因子
Materials Today Physics
·
2022
·
IF 11.021
Shibo Wang,Fengxian Cao,Weihai Sun,Chunyan Wang,Zhongliang Yan,Nan Wang,Zhang Lan,Jihuai Wu
All-brominated inorganic perovskite CsPbBr 3 has received much attention in the field of optoelectronic applications owing to its superb stability and ease of manufacture under the ambient condition. However, the tedious process and toxic solvent are two major challenges for fabrication of CsPbBr 3 films via a multi-step deposition method . Here, we demonstrate a sustainable bi-solvent system for preparing high-quality CsPbBr 3 films in a triple-step solution-processed route, where the bi-solvent system comprises of green solvent water and ethylene glycol monomethyl ether (EGME) in place of the noxious methanol for CsBr solution. By adjusting the temperature of heat treatment and spin-coating speed, the pinhole-free, ultra-smooth and high crystallinity of CsPbBr 3 films were obtained. As a result, the CsPbBr 3 PSC prepared from the green bi-solvent system demonstrates an optimal power conversion efficiency (PCE) of 9.55%, which is one of the highest efficiencies for planar carbon-based PSCs without hole transport layer. Moreover, the all-inorganic unpacked PSCs exhibit excellent humidity stability under ambient environment for 34 days. Our result not only offers a facile and simple way to fabricate the pure-phase CsPbBr 3 films, but also alleviates the solvent toxicity during the preparation of CsPbBr 3 PSCs.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）