ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaowei Li,Xing Shen,Junmei Zhao,Yang Yang,Qiangqiang Zhang,Feixiang Ding,Miao Han,Chunliu Xu,Chao Yang,Huizhou Liu,Yong-Sheng Hu
Na-ion batteries (NIBs) have been considered as potential candidates for large-scale energy storage, where O3-type Na-based layered oxide cathodes have attracted great attention due to their high capacity and low cost. However, O3-NaxTMO2 materials still suffer from insufficient air stability, which could lead to deteriorative electrochemical properties and thus hinder their practical application. In this work, a series of Al-doped O3-NaFe(1/3–x)Ni1/3Mn1/3AlxO2 cathodes prepared by a co-precipitation method were investigated to enhance their electrochemical performance and air stability through stabilizing their structural and interface chemical properties. The Al-doped O3-NaFe(1/3–0.01)Ni1/3Mn1/3Al0.01O2 (NFNMA0.01) cathode delivers a comparable capacity of 138 mAh g–1 and keeps a capacity retention of 85.88% after 50 cycles at 0.2 C, while the undoped O3-NaFe1/3Ni1/3Mn1/3O2 (NFNM) can only keep a capacity retention of 71.02%, although with an initial capacity of 141 mAh g–1 at 0.2 C. For the air stability, the capacity decay rates are 58.87 and 5.07% for the undoped NFNM and Al-doped NFNMA0.01 after the air exposure for 30 days, respectively. The greatly decaying electrochemical performance could be due to the formation of carbonates during air exposure, which can be efficiently suppressed by Al doping. The doped Al3+ has been confirmed to be inserted into the NFNM crystal lattice, inducing the reduced values of lattice parameters a and c due to the smaller ionic radius of Al3+ (53.5 pm) vs Fe3+ (55.0 pm). This study demonstrates that Al doping plays an important role in the air stability and cycling stability for layered cathode materials, which offers an efficient strategy to optimize the material design for their practical application in NIBs.
研究领域:
储能
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 48
·17486-17492
·
IF 4.099
Fangfang He,Lei Wang,Cuifang Hu,Jing Zhou,Qian Li,Ling Huang,Daojiang Gao,Jian Bi,Xin Wang,Guohong Zou
Four antimony fluoride sulfates named A2SO4·SbF3 (A = Na+, NH4+, K+, Rb+) have been successfully synthesized using a hydrothermal method by introducing Sb3+ cations with a stereochemically active lone pair in sulfates and subsequently tuning the structure through the second monovalent cations. All of the title compounds are stoichiometrically equivalent materials which share a common structural motif composed of a distorted SO4 tetrahedron and an asymmetric SbF3 polyhedron. However, the macroscopic centricities of these four compounds are significantly influenced by the size and coordination environment of cations; Na2SO4·SbF3 crystallizes in centrosymmetric space groups Cmca and (NH4)2SO4·SbF3 in Pbca, while K2SO4·SbF3 and Rb2SO4·SbF3 crystallizes in noncentrosymmetric space group P212121. Complete characterization including thermal analyses, infrared and UV-vis spectroscopy, and theoretical calculations is also reported. Powder second harmonic generation measurement for noncentrosymmetric K2SO4·SbF3 and Rb2SO4·SbF3 indicated that both of them are type I phase-matchable.
研究领域:
无机化学
·
材料科学
·
非线性光学
·
晶体工程
·
固态化学
✓ 已验证
DOI
高影响因子
IONICS
·
2016
·Vol. 22
·期 11
·2087-2093
·
IF 2.119
Yang F.,Yu Z.,Meng B.,Zhu Y. J.,Yang Q. Q.,Lin Z. L.,Zhou H. M.,Liang X. L.
The Sr 1 − x
Na
x
SiO 3 − x /2 samples (SNS, x = 0.2, 0.3, 0.4, 0.45) were prepared by spark plasma sintering (SPS) at a lower sintering temperature of 850 °C for a shorter holding time of 5 min. All SNS samples by SPS are composed of single monoclinic SrSiO 3 phase, and the grain sizes are in the range of 1.9 ± 0.5 μm. The measurement results of the electrical properties show that the conductivities of SPS samples are one order of magnitude higher than those of the samples by traditional sintering method. The ion transference numbers of SNS samples by SPS are all higher than 0.99 in the temperature range of 500∼650 °C, which demonstrates that the SNS has met the requirements as solid oxide fuel cell electrolytes and the SPS process is a promising candidate for preparations of SNS electrolytes.
研究领域:
材料科学
·
陶瓷
·
固态离子学
·
能源材料
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2019
·Vol. 11
·期 20
·5098-5107
·
IF 4.495
Ning Xiang,Yaqin Hou,Xiaojin Han,Yulin Li,Yaoping Guo,Yongjin Liu,Zhanggen Huang
Room temperature HCHO catalytic oxidation over inert support loaded Pd catalysts remains a significant challenge. Herein, a series of alkali Na (1–4 wt.%) modified 1Pd/SBA-15 catalysts were prepared by a co-impregnation method and used for HCHO catalytic oxidation at room temperature. Results showed that alkali Na significantly improved the HCHO oxidation performance of 1Pd/SBA-15 and the optimal Na loading was 2 wt.%. BET, XRD, STEM, XPS, H 2 -TPR, O 2 -TPD and in situ DRIFTS were performed to reveal the promotion role of alkali Na. As a consequence, alkali Na addition could stabilize well dispersed Pd particles which then facilitated the O 2 activation and accelerated the decomposition of formate intermediates species, thus a superior HCHO catalytic oxidation performance was obtained. This study first clearly illustrated the promotion mechanism of alkali Na without the implication of active support and provides an efficient and facile way to achieve high dispersion of Pd particles on inert support and tremendously expands the selected range of supports for room temperature HCHO catalytic oxidation. Graphical Alkali promoted : A series of Na alkali-promoted 1Pd/SBA15 catalysts were prepared by a co-impregnation method and tested for HCHO catalytic oxidation at room temperature. Addition of alkali Na stabilized well-dispersed Pd particles which facilitated O 2 activation and accelerated formate species decomposition rate, leading to superior HCHO catalytic oxidation performance of 2Na-1Pd/SBA-15.
研究领域:
催化化学
·
环境科学
·
材料化学
·
表面科学
·
大气污染控制
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 33
·17491-17502
·
IF 11.9
Qingyuan Liu,Jianchao Chen,Danni Du,Shuxian Zhang,Chunyan Zhu,Zhiwei Zhang,Chengxiang Wang,Longwei Yin,Rutao Wang
Sodium-ion capacitors (SICs) have long been pursued as economically favorable alternatives to their well-developed lithium-ion counterparts. However, their commercialization suffers from the immature pre-sodiation technology in existence, primarily due to the increased cost and risk invoked by the use of highly reactive metallic sodium and sodium containing additives as sodium sources. Herein, we uncover a unique approach based on the use of prelithiated carbon as the anode for SICs. The prelithiated hard carbon anode with the preformed solid-electrolyte-interphase (SEI) layer can effectively compensate the large irreversible capacity loss and greatly improve the initial coulombic efficiency of SICs. Besides, the preformed Li-based SEI layer is effective in controlling the Na-ion intercalation behavior of the carbon anode, as confirmed by the reversible capacity that is mainly contributed by the extended slope region without the low-potential plateau region, thus avoiding the safety issues from Na metal plating. These features endowed by the pre-lithiation strategy enable us to use a slope region-dominated soft carbon anode for high-safety SICs with high capacity and superior rate capability. This work possesses far-reaching potential to implant the mature pre-lithiation technology into sodium-ion energy storage systems to resolve the scientific bottleneck from the immature pre-sodiation technology.
研究领域:
能量存储
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 93
·90455-90461
·
IF 3.289
Peng Lu,Xiaobing Huang,Yurong Ren,Jianning Ding,Haiyan Wang,Shibiao Zhou,Yuandao Chen,Xiang Ding
Na+ and Zr4+ co-doped lithium titanates with the formula Li4−xNaxTi5−xZrxO12 (x = 0, 0.01, 0.03, 0.05, 0.10, 0.15 and 0.20) were successfully synthesized via a solid-state reaction in air. XRD analysis indicates that Na+ and Zr4+ co-doping does not change the spinel structure of Li4Ti5O12 and the lattice parameter slightly increases with the enhancement of doping amount. Smaller particle size and larger BET surface areas are obtained for Na+ and Zr4+ co-doped Li4Ti5O12 samples. The four-point probe method and electrochemical impedance spectroscopy (EIS) results demonstrate that the Na+ and Zr4+ co-doped Li4Ti5O12 samples possess higher electrical conductivity and smaller charge transfer resistance compared with undoped Li4Ti5O12, resulting in improved electrochemical performance. Particularly, Li3.97Na0.03Ti4.97Zr0.03O12 exhibits the best rate capability and cycling stability. Even at 20C, it delivers a discharge capacity of 140 mA h g−1, and after 100 cycles at 10C, 97.7% of its initial capacity is retained.
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yunzhao Liu,Xiaowei Chi,Qi Han,Yuexiu Du,Jianhua Yang,Yu Liu
Sodium–oxygen (Na−O 2 ) batteries are being extensively studied because of their higher energy efficiency and lower cost compared to those of lithium–oxygen (Li–O 2 ) batteries. However, highly efficient and durable cathode catalysts are very limited, thus considerably hindering the application of Na–O 2 batteries. Herein, a vertically self-standing C@NiCo 2 O 4 nanoneedle arrays (C@NiCo 2 O 4 -NAs) have been delicately designed and fabricated by a facile hydrothermal method . The NiCo 2 O 4 nanoneedles are in-situ grown on the carbon paper , forming an unique urchin-like structure, which is directly used to Na–O 2 batteries as a self-standing and binder-free cathode for the first time. Under a current density of 50 mA g −1 , the Na–O 2 battery containing C@NiCo 2 O 4 -NAs cathode shows a high initial discharge capacity of 6500 mAh g −1 (based on NiCo 2 O 4 material mass) and low over-potential of 0.6 V due to the numerous catalytic sites and high electron mobility of C@NiCo 2 O 4 -NAs. SEM, XPS and FTIR tests have confirmed the formation of thin film-like Na 2 O 2 discharge product on the surface and gaps of NiCo 2 O 4 nanoneedles, and the special film-like structure can facilitate the decomposition of Na 2 O 2 in the subsequent charging process and reduce the over-potential notably. Meanwhile, the robust urchin-like structure of C@NiCo 2 O 4 -NAs renders the Na–O 2 battery a high cyclic stability up to 120 cycles when the specific capacity is limited to be 800 mAh g −1 .
研究领域:
储能
·
材料科学
·
电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jianhui Zhu,Linchao Zeng,Yumin Song,Feng Peng,Yanyi Wang,Tingshu He,Libo Deng,Peixin Zhang
Room-temperature sodium-sulfur (RT Na-S) batteries have been attracting enormous interests due to their low-cost, high capacity and environmental benignity. However, the shuttle effect and the sluggish electrochemical reaction activity of sodium polysulfides (NaPSs) seriously restrict their practical application. To solve these issues, we rationally designed an advanced Sn-doped In 2 S 3 /S/C cathode for RT Na-S batteries by magnetron sputtering in this work, which exhibited a high reversible capacity (1663.5 mAh g −1 at 0.1 A g −1 ) and excellent cycling performance (902.9 mAh g −1 after 50 cycles). The in situ electrochemical impedance spectroscopy indicated that the Sn-doped In 2 S 3 coating can accelerate charge-transfer kinetics and facilitate the diffusion of Na + . Furthermore, theoretical calculation revealed that doping of Sn into In 2 S 3 can reduce the energy band gap, thus accelerating the electron transfer and promoting the electrochemical conversion of active species. It is demonstrated that adjusting the electronic structure is a reliable method to improve the electrocatalytic effect of catalyst and significantly improve the performance of S cathode in RT Na-S batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Crystals
·
2022
·Vol. 12
·期 10
·1339
·
IF 2.67
Hui Han,Ying-Ying Wang,Xing-Chao Yu,Yan-Na Ma,Xuenian Chen
Alkali metal (M = Na, K) salts of the [CB11H12]−anion have attracted increasing attention in many fields such as catalysis and all-solid-state batteries. However, tedious and low-yielding synthetic methods have seriously limited their application in these fields. We developed a facile method for the direct synthesis of the unsolvated potassium and sodium salts of the [CB11H12]−anion in 66% and 68% yields, respectively, by reactions of Na[B11H14] with NaH/NaHMDS (sodium bis(trimethylsilyl)amide), CF3SiMe3in THF and K[B11H14] with KH, CF3SiMe3in DME. This method avoids the exchange of cation and significantly simplifies the reaction setup, thus enabling convenient large-scale synthesis. It is believed that this method will support further application of Na[CB11H12] and K[CB11H12] as solid electrolytes for an all-solid-state battery.Keywords:Na[CB11H12];K[CB11H12];Na[B11H14];K[B11H14];one-pot synthesis
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Li-Rong Guo,Guo-Liang Nie,Rui-Zhi Cui,Wu Li,Yong-Ming Zhang
In addition to the common sodium salt, potassium salt, magnesium salt, and sulfate, salt lake brine is also rich in trace components in varying degrees, such as lithium, bromine, rubidium, cesium, and so forth, which is of great industrial value. These trace components are further concentrated and enriched in old brine during the process of evaporation and concentration of brine resources. In view of the coexistence characteristics of lithium, potassium, bromine, and other ions in old halide, the phase equilibria of quinary system Li+, Na+, K+/Br–, and SO42––H2O were studied by the isothermal dissolution equilibrium method at 298.15 K. The solubility data of the equilibrium liquid phase were measured, and the compositions of the solid phase as well as the crystal forms of the equilibrium solid phase were identified when the equilibrium was achieved. The corresponding 3D and dry-base phase diagrams (Na2SO4·10H2O, K2SO4, LiBr·2H2O, Li2SO4·H2O, KBr, and NaBr·2H2O saturated) were drawn based on the phase equilibrium experimental data. The research results of phase equilibria and phase diagrams reveal that the phase relations and crystallization–dissolution law of each component in solution lay a certain foundation for further research on multi-temperature phase equilibrium and thermodynamic properties of the high-component brine system and to provide basic thermodynamic data for guiding the rational development and comprehensive utilization of brine resources.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 7
·2103724
·
IF 17.521
Xingwen Cheng,Zhi Xie,Wei Zheng,Renfu Li,Zhonghua Deng,Datao Tu,Xiaoying Shang,Jin Xu,Zhongliang Gong,Xingjun Li,Xueyuan Chen
Fundamental understanding of the effect of doping on the optical properties of 3D double perovskites (DPs) especially the dynamics of self-trapped excitons (STEs) is of vital importance for their optoelectronic applications. Herein, a unique strategy via Cu + doping to achieve efficient STE emission in the alloyed lead-free Cs 2 (Ag/Na)InCl 6 DPs is reported. A small amount (1.0 mol%) of Cu + doping results in boosted STE emission in the crystals, with photoluminescence (PL) quantum yield increasing from 19.0% to 62.6% and excitation band shifting from 310 to 365 nm. Temperature-dependent PL and femtosecond transient absorption spectroscopies reveal that the remarkable PL enhancement originates from the increased radiative recombination rate and density of STEs, as a result of symmetry breakdown of the STE wavefunction at the octahedral Ag + site. These findings provide deep insights into the STE dynamics in Cu + -doped Cs 2 (Ag/Na)InCl 6 , thereby laying a foundation for the future design of new lead-free DPs with efficient STE emission.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Xinghui Wu,Lina Yang,Mingjie Xia,Kejin Yu,Wenqi Cai,Taiyuan Shi,Mengxi Xie,He Liu
The stable energy barrier of mucin and soy hull polysaccharide (SHP) is established at the air/water interface in the intestinal fluid and is conducive to the absorption and transportation of nutrients. This study aimed to investigate the effect of different concentrations (0.5 % and 1.5 %) of Na + and K + on the energy barrier through the digestive system model in vitro . The interaction between ions and microwave-assisted ammonium oxalate-extracted SP (MASP)/mucus was characterized by particle size, zeta potential, interfacial tension, surface hydrophobicity, Fourier transform infrared spectroscopy, endogenous fluorescence spectroscopy, microstructure, and shear rheology. The results showed that the interactions between ions and MASP/mucus included electrostatic interaction, hydrophobic interaction, and hydrogen bond. The MASP/mucus miscible system was destabilized after 12 h, and the ions could improve the system stability to some extent. MASP aggregated continuously with the increase in the ion concentration, and large MASP aggregates were trapped above the mucus layer. Furthermore, the adsorption of MASP/mucus at the interface increased and then decreased. These findings provided a theoretical basis for an in-depth understanding of the mechanism of action of MASP in the intestine.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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