JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2016
·Vol. 99
·期 9
·3060-3066
·
IF 2.787
Chaoyu Li,Yubai Pan,Huamin Kou,Haohong Chen,Wei Wang,Tengfei Xie,Jiang Li
In this study, transparent ZnS ceramics were hot pressed from precipitated wurtzite nanopowders. Influences of sintering temperature on wurtzite-to-sphalerite phase transition and densification behavior have been investigated. Maximum sphalerite phase content and highest densification were simultaneously obtained in the sample hot pressed at 900°C with uniaxial pressure of 250 MPa for 2 h, which accounts for the highest transmittance above 55% and 70% in the range 2–5 μm and 5–13 μm, respectively. Preferred orientation of wurtzite grains in [002] direction paralleled to the press direction was also observed, which is supposed to be benefit to transmittance by reducing birefraction and second-phase scattering. Furthermore, second-phase scattering caused by wurtzite grains has been investigated. It is found that fine grains are conducive to hot-pressed ZnS ceramics with high transmittance, especially in the short-wavelength range.
研究领域:
材料科学
·
无机非金属材料
·
陶瓷学
·
光学材料
·
纳米材料
·
固态物理
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 14
·期 17
·5487-5492
·
IF 3.842
Feng Zhang,Xiaoqin Zou,Fuxing Sun,Hao Ren,Yuan Jiang,Guangshan Zhu
A thin film of MIL-53(Al) on the activated Al slice has been prepared successfully. The crystals in the films exhibit high phase purity and a preferential orientation with straight channel network (or (h0l) planes) of the crystals parallel to the support surface, which are studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The loading of organic (2-(2-hydroxyphenyl)-pyridine) (PP) fluorescent molecules in the film has been accomplished. The behaviours of the fluorescent molecules assembled in the pores of the oriented crystals are probed by Fourier transform infrared (FT-IR) and fluorescence spectroscopies.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
药物递送
·
表面科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jing Zhou,Jiawei Zhu,Weilan He,Yu Cao,Jinbo Pang,Jian Ni,Jianjun Zhang
Antimony selenide (Sb 2 Se 3 ) has rapidly emerged in the field of photovoltaics with one-dimensional crystal structure. However, the power conversion efficiency (PCE) of Sb 2 Se 3 solar cells is influenced by the orientation of the Sb 2 Se 3 photoactive layers. In this study, we investigate the influence of substrate properties on the preferred orientation and microstructure of Sb 2 Se 3 films systematically. With the rise of substrate surface temperature and the decline of substrate surface bonding energy, the preferred orientation of the Sb 2 Se 3 films altered from (hk0) to (hk1) and finally to (002). After summarizing the performance of different preferentially oriented Sb 2 Se 3 solar cells, the results showed that the (hk0)-preferentially oriented devices exhibited a poor performance of less than 1.1 %. As the preferred orientation of Sb 2 Se 3 absorbers changed from (hk0) to (hk1), the carrier transport changed from inter-ribbon charge hopping to transportation along the (Sb 4 Se 6 ) n ribbons. This enhanced the carrier transport efficiency, thereby leading to the enhancement of the PCE to 2–3 %. Furthermore, when the (002) texture coefficient (TC) of the Sb 2 Se 3 films was between 1.8 and 3.6, the PCE of the devices was further enhanced to above 3.5 %. A maximum PCE of 4.79 % can be obtained when the (002) TC was 3.24. This study reveals the relationship between the Sb 2 Se 3 film preferred orientation and device performance, and demonstrates an effective way to precisely control the Sb 2 Se 3 film microstructure to obtain a high PCE.
研究领域:
材料科学
·
光伏技术
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 28
·2101476
·
IF 18.808
Yanlin Pan,Xiaobo Hu,Yixin Guo,Xingyu Pan,Fei Zhao,Guoen Weng,Jiahua Tao,Chunhu Zhao,Jinchun Jiang,Shaoqiang Chen,Pingxiong Yang,Junhao Chu
The vapor transport deposition of quasi-one-dimensional antimony selenosulfide (Sb 2 (S,Se) 3 ) has recently attracted increasing research interest for the inexpensive, high-throughput production of thin film photovoltaic devices. Further improvements in Sb 2 (S,Se) 3 solar cell performance urgently require the identification of processing strategies to control the orientation, however the growth mechanism of high quality absorbers is still not completely clear. Herein, a facile and general vapor transport deposition approach to precisely control the growth of large-grained dense Sb 2 (S,Se) 3 films with good crystallization and preferred orientation via the source vapor speed is utilized. It is found that defect activation energy rather than the defect concentration plays a decisive role in the Sb 2 (S,Se) 3 photovoltaic performance. Admittance spectroscopy analysis is used to obtain efficient Sb 2 (S,Se) 3 solar cells. By employing dual-source coordinations to optimize the absorber layer a power conversion efficiency of 8.17% is obtained which is the highest efficiency for Sb 2 (S,Se) 3 solar cells fabricated by vapor transport technology. This study suggests that there are other opportunities for gaining deeper a understanding of the defect physics and carrier recombination mechanisms in other highly oriented low-dimensional materials to achieve improved device performance.
研究领域:
材料科学
·
光伏技术
·
半导体薄膜
·
可再生能源
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Tang Fang,Yang Yang,Liu Congcong,Yang Shoumeng,Xu Shitan,Yao Yu,Yang Hai,Yang Yaxiong,He Shengnan,Pan Hongge,Rui Xianhong,Yu Yan
Constructing high cycling stability and rate performance under limited or ideally zero sodium excess, namely initially anode-free design, which can obtain the ultimate energy density of sodium metal batteries, is highly desired yet remains challenging. Here, highly ordered and regularly arranged Al(100) single crystal current collector is constructed based on the grain boundary migration theory through a simple high-temperature calcination method, which eliminates the diffusion resistance of Na + migration at grain boundaries, reduces the nucleation overpotential and interface diffusion energy barrier, increases the Na + transfer rate, and exhibits uniform reversible sodium deposition capability. Profiting from the modified current collector surface, the Al(100) electrode can be cycled stably for 500 cycles with a Coulombic efficiency of 99.9% (2 mA cm −2 /2 mAh cm −2 ), and its symmetrical cell delivers an adequate Na plating/stripping stability over 2500 h (0.5 mA cm −2 /0.5 mAh cm −2 ) and 1500 h (1 mA cm −2 /1 mAh cm −2 ). The Al(100) current collector enhances the rate performance of the initially anode-free Al(100) ‖ Na 3 V 2 (PO 4 ) 3 full battery, enabling it to sustain 100 cycles at a high current density of 1.755 mA cm −2 with a final discharge capacity of 68.0 mAh g −1 (constant current-constant voltage charging protocol).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Powder Materials
·
2025
·Vol. 4
·期 5
·100332
·
IF 24.9
Xiancheng Bu,Mingzhu Li,Zhexuan Liu,Shuquan Liang,Guozhao Fang
Aqueous zinc ion batteries (AZIBs) have emerged as a promising energy storage technology due to their high safety and low cost. However, the practical application of AZIBs is severely hindered by unstable Zn anodes especially under high depth of discharge (DOD). This study proposes an in-situ interface alloying engineering based on Ce 3+ additive to regulate Zn deposition behaviors, significantly enhancing the cycling stability and reversibility of Zn anodes. Ce 3+ undergoes in-situ formation of ZnCe alloy on Zn anode interface, inducing preferential deposition of dense Zn (002) plane and effectively mitigating concentration polarization. Zn//Zn symmetric cells with Ce 3+ electrolytes achieve stable cycling for 3000 h at 1 mA cm −2 and deliver a cumulative capacity of 27 Ah cm −2 (5400 h) at a high current density of 5 mA cm −2 . Even under a high DOD of 68.4%, it maintains stable cycling for 420 h. Full cells with a low Negative/Positive capacity (N/P) ratio of 4.30 and high cathode loading of 10 mg cm −2 can stably cycle over 1000 cycles at 2 A g −1 . Furthermore, an 80 mAh-level pouch cell with N/P ratio of 4.68 retains 85% capacity after 100 cycles. This article provides new insights into the interfacial engineering for practical AZIBs.
研究领域:
电化学
·
材料科学
·
能源存储
·
界面工程
·
金属负极
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Hongbao Wang,Zonglin Yi,Hao Liu,Zhenbo Zhao,Shouchun Zhang,Quangui Guo,Fangyuan Su,Xinghua Zhang
The boric acid modification offers an effective approach to improve the radial homogeneity and mechanical performance of polyacrylonitrile (PAN)-based carbon fibers by affecting stabilization behavior. However, the mechanism of how boron affects the stabilization process remains unclear. Herein, the impact of boron on the cyclization and oxidation reactions is investigated through experimental data and computational calculations. The results reveal that boron oxide exhibits a stronger electron-withdrawing effect on cyano nitrogen compared to hydroxyl oxygen, effectively inhibiting both ionic and free radical cyclization reactions, as well as subsequent oxidation reactions in the skin regions. This inhibitory effect enhances the cross-sectional oxygen uptake and stabilization. The boric acid also improves the preferred orientation in precursor fibers by reducing the polarity of cyano groups and promotes the inheritance of structural characteristics from precursor fibers through “cross-linking” effect. Consequently, the structural characteristics and mechanical properties of modified carbon fibers are significantly improved. These findings could provide fundamental insights into the mechanisms of thermal reaction regulation and microstructure evolution in the preparation of high-performance PAN-based carbon fibers.
研究领域:
材料科学
·
高分子科学
·
化学工程
·
纳米技术
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
Carbon Energy
·
2025
·
IF 24.2
Pengcheng Wang,Xuqi Lin,Houlin Cheng,Ciqi Yuan,Yongping Zheng,Yingbin Lin,Zhigao Huang,Hao Chen,Jiaxin Li
Na 3 V 2 (PO 4 ) 3 (NVP) is a promising electrode material that exhibits magnetic anisotropy; however, the potential of this magnetic anisotropy to optimize battery performance has been largely unexplored. This study proposes a cost-effective and efficient method to induce the alignment of NVP along the (113) crystal plane by applying a vertical magnetic field during the slurry coating process, thereby enhancing its battery performance. Comprehensive structural characterizations and theoretical analysis elucidate the structure-activity relationship between the preferred crystal orientation and ion transport kinetics, facilitating the formation of more ordered Na + deintercalation pathways in NVP electrodes. This alignment reduces electrode tortuosity, enhances interfacial compatibility, and substantially improves battery performance, particularly in terms of high-rate cycling capability. As a result, the magnetic-field-modulated NVP (NVP−M⊥) electrode exhibits a high capacity retention of 85.1% after 500 cycles at 5 C, significantly surpassing that of the pristine electrode. The NVP−M⊥ electrode also demonstrates considerable reversible capacity at 40 C and maintains excellent stability under high temperature and prolonged cycling conditions. Furthermore, superior battery performance is observed in the assembled NVP−M⊥||hard−carbon pouch cell and commercial NVP electrode following magnetic-field modulation, thereby validating the efficacy of this method. Consequently, this magnetic-field-induced crystal-orientation optimization strategy provides an innovative approach for low-cost and high-throughput preparation of high-performance sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Jiawei Zhang,Xin Chen,Chenhao Qian,Binbin Fan,Limin Wang
The design and synthesis of high-performance levelers remain a major challenge to date. Herein, a series of phenothiazine (PTZ) derivatives were designed and synthesized, and they had a butterfly conformation, and their adsorption capacities were easier to modulate. To check out the inhibition capabilities among these eight PTZ derivatives, electrochemical measurements and theoretical calculations were carried out, and PTZ-8 indicated the strongest inhibition capabilities among these PTZ derivatives. Besides, galvanostatic measurements were also carried out to evaluate the overall performance of the levelers. The results showed that PTZ-8 had a potential oscillation, but PTZ-6 had strong convection-dependent adsorption. Due to the potential oscillation of PTZ-8, PTZ-6 as the representative leveler was selected for through-hole electrodeposition. In addition, field-emission scanning electron microscope images and X-ray diffraction results displayed the surface morphology, which indicated that the addition of PTZ-6 could lead to a fine copper deposit and cause the preferential orientations of copper deposits to change from [220] to [111]. This study might lay the foundation for the design of high-performance levelers.
研究领域:
电化学
·
材料科学
·
表面化学
✓ 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）