RSC Advances
·
2016
·Vol. 6
·期 42
·36118-36124
·
IF 3.289
Y. Feng,W. L. Li,D. Xu,W. P. Cao,Y. Yu,W. D. Fei
Recently, we proposed a new approach (Li+–Al3+ ionic pairs doping) to enhance the piezoelectric properties of BaTiO3 ceramic. Here we sequentially prove that Li+ and Al3+ can also enhance the piezoelectric properties of PbZr0.52Ti0.48O3 (PZT) ceramic. The X-ray diffraction results demonstrate the optimized distribution of Li+–Al3+ ionic pairs parallel to the [001] direction in the doped ceramics, as same as the results in BaTiO3-based ceramic. The doped ceramics exhibit constricted hysteresis loops, which is associated with the restoring force of Li+–Al3+ ionic pairs as a result of the Coulomb force between Li+ and Al3+ ions. The results show that the piezoelectric properties and corresponding temperature stability of the doped ceramics were enhanced significantly. The analysis and conclusion indicate that the piezoelectric mechanism coming from ionic pairs applies equally well to the PZT ceramic. Co-doping Li+ and Al3+ into the A-site is a preferable approach for the piezoelectric property enhancement of ABO3 ferroelectric ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Junji Guo,Xungang Diao,Mei Wang,Zhi-Bin Zhang,Yizhu Xie
Electrochromic devices with unique advantages of electrical/optical bistability are highly desired for energy-saving and information storage applications. Here, we put forward a self-driven Al-ion electrochromic system, which utilizes WOx films, Cu foil, and graphite rod as electrochromic optical modulation and graph display electrodes, coloration potential supplying electrodes, and bleaching potential supplying electrodes, respectively. The inactive Cu electrode can not only realize the effective Al3+ cation intercalation into electrochromic WOx electrodes but also eliminate the problem of metal anode consumption. The electrochromic WOx electrodes cycled in Al3+ aqueous media exhibit a wide potential window (∼1.5 V), high coloration efficiency (36.0 cm2/C), and super-long-term cycle stability (>2000 cycles). The dynamic optical modulation and static graph display function can be achieved independently only by switching the electrode connection mode, thus bringing more features to this electrochromic system. For a large-area electrochromic system (10 × 10 cm2), the absolute transmittance value in its color-neutral state can reach about 41% (27%) at 633 nm (780 nm) by connecting the Cu and WOx electrodes for 140 s. The original transparent state can be readily recovered by replacing the Cu foil with the graphite rod. This work throws light on next-generation electrochromic applications for optical/thermal modulation, privacy protection, and information display.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Datian Li,Weiqing Liu,Wenhao Chen,Baoshuo Han,Xiaobo Xu,Qingqing Chang,Zhuoyu Yang,Yixiao Wang
The aqueous battery employing multivalent metal ions as charge carriers is theoretically a high energy density electrochemical energy storage device due to the fact that it carries more charges. However, the storage mechanism of multivalent metal ions, especially Al 3+ ions, in TiO 2 materials has not been established. A new model associated with the contribution of multivalent metal ions, water molecules and protons in the charging/discharging process of the electrode is established in this work. The storage mechanism of aqueous Al 3+ ion batteries is revealed from a new perspective by studying the relationship between the charge inside the TiO 2 film and the mass at the interface. More importantly, a highlighted work is to reveal the changes in the amount of interfacial free water molecules and the hydration number of Al 3+ ions due to the adsorption/desorption of hydrated ions during the charging/discharging process. The present work is of great significance for revealing the mechanism of multivalent cations on metal oxide surfaces in aqueous batteries, and meanwhile, the model established can also be extended to other fields such as supercapacitors , photovoltaics, and photocatalysis . The results obtained in this work may have an impact on the performance of energy storage batteries, especially the influence of the rearrangement of interface hydration ions and water molecules on the energy storage mechanism.
研究领域:
电化学
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材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2014
·Vol. 2
·期 22
·4406-4414
·
IF 0
S. Wang,F. Lou,C. Yu,Q. Zhou,M. Wang,S. Feng,D. Chen,L. Hu,W. Chen,M. Guzik,G. Boulon
Three series of Yb3+-doped silica glasses containing different amounts of Al2O3 and P2O5 were prepared successfully by using a sol–gel method. Absorption, excitation and fluorescence spectra of Yb2+ ions in these silica glasses as well as X-ray photoelectron spectra (XPS) of Yb4d were recorded and analysed systematically. It is found out that the addition of Al3+ or P5+ ions has great influence on the redox state of ytterbium ions. With increasing Al3+ ion contents in these silica glasses, more trivalent Yb3+ ions are reduced to divalent Yb2+. In contrast, the increase of P5+ ion contents greatly promotes divalent Yb2+ ions to be oxidized to trivalent Yb3+. The possible redox mechanisms have been explored and discussed in detail. The influence of Al3+ and P5+ ion contents on the near-infrared luminescence intensity of Yb3+ ions and cooperative luminescence of Yb3+ ion pairs was also discussed. Both the near-infrared luminescence intensity of Yb3+ ions and cooperative luminescence of Yb3+ ion pairs decrease gradually with increasing Al3+ and P5+ ion contents. The decrease of cooperative luminescence of Yb3+ ion pairs indicates a good dispersion effect of Al3+ and P5+ ions on Yb3+ ions in Yb3+-doped silica glass. The results are useful for optimization of fabrication of the high quality Yb3+-doped silica fiber by the composite design of Yb–Al–P co-doped silica glass.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Jiguo Tu,Xiang Xiao,Mingyong Wang,Shuqiang Jiao
In this work, hierarchical flower-like MoS2 microspheres synthesized through a facile hydrothermal approach are used as a cathode for aluminum-ion batteries. They exhibit an initial specific discharge capacity of 153.6 mAh g–1 at a current density of 50 mA g–1 and deliver a stable capacity of 112.2 mAh g–1 with a Coulombic efficiency of 92.4% over 100 cycles on account of the unique hierarchical structure, which provides abundant space for aluminum storage. Moreover, the characterization results confirm that Al3+ ions can be intercalated into the MoS2 phase to form AlxMoS2 during the discharge process. The density functional theory calculation results indicate that the structure of MoS2 can be stabilized during the intercalation/deintercalation process.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
TETRAHEDRON
·
2024
·
IF 2.1
Shaochen Sun,Tianyu Li,Yan Zhu,Farong Tao,Liping Wang,Shuangshuang Wang,Xueguo Zhang,Tonghui Zhang,Guang Li
A novel water-soluble polymer P1 functionalized with pyrazine Schiff-base derivative was successfully synthesized. As an efficient “turn-on” fluorescent chemosensor , P1 showed high selectivity and anti-interference ability for the detection of Al 3+ ions in pure aqueous solutions. The detection limit of P1 for Al 3+ ions was as low as 3.68 × 10 −8 M. P1 displayed good detectability for Al 3+ ions over a wide pH range of 5–10. The detection of Al 3+ ions by P1 has been proven to have excellent reversibility by alternately adding Al 3+ ions and EDTA to P1 aqueous solution. Furthermore, P1 could be applied to quantitative determination of Al 3+ ions in real water samples. P1-based test strips were also facilely prepared for convenient on-site qualitative detection of Al 3+ ions in realistic aqueous samples.
研究领域:
分析化学
·
材料科学
✓ 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）