ACS Applied Nano Materials
·
2024
·
IF 5.3
Meiyang Hu,Xianwen Wang,Yajun Li,Sheng Zhong,Xuan Zhong,Rashid Khan,Jingzhe Zhao,Lu Huang,Yingpeng Wu
Constructing artificial SEI (ASEI) is an effective method to suppress dendrite growth and achieve a stable solid electrolyte interphase in a potassium metal anode. However, traditional methods for preparing ASEI still have some problems such as poor adhesion and inadequate/uneven reactions. These drawbacks significantly impede ion diffusion kinetics and the effectiveness of dendrite inhibition. In this study, an in situ reaction approach was introduced to fabricate a Fe-based protective layer on the surface of K via the spontaneous dynamic chemical reaction between Fe3O4 and K. The in situ-formed Fe-based artificial protective layer not only prevents the corrosion of the carbonate electrolyte, but also has high potassiophilicity and high ionic conductivity, which can reduce side reactions, regulate the uniform adsorption of K+, and improve the transport kinetics of K+, thus inhibiting the growth of potassium metal dendrites. With the Fe-based protective layer, the symmetric cell demonstrates a cycling stability exceeding 1700 h at 0.5 mA cm–2 and 0.5 mAh cm–2. Notably, it also exhibits a promising cycling stability and rate performance when paired with a Prussian blue (PB) cathode. This work offers insights into the development of protection layers for an advanced alkali metal anode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Mengen Hu,Lei Liu,Zhen Wang,Xian Dang,Chengwan Yang,Xinyang Li,Ming Li,Xiaoye Hu,Yue Li,Zhulin Huang,Xinghong Zhang
The pure phase and ultrafine WB 2 powders were successfully synthesized using a liquid phase precursor synergized with boro/carbothermal reduction method. Subsequently, dense WB 2 -SiC composites (99.5%) were fabricated through hot pressing sintering. The effects of La 2 O 3 additive on the densification, mechanical properties, and ablation resistance of WB 2 -SiC composites were systematically investigated. The ablation behavior of the composites was evaluated using a plasma flame. The results indicate that the mass ablation rate of WB 2 -SiC-La 2 O 3 is 0.463 mg/s, and the linear ablation rate is 0.311 μm/s when exposed to a 2273 K plasma flame for 60 s. The excellent ablation resistance is attributed to the reaction between La 2 O 3 and SiO 2 at high temperature, which generates La 2 Si 2 O 7 , effectively pinned in the glassy phase to inhibit the volatilization of B 2 O 3 . Furthermore, La 2 O 3 also reacts with B 2 O 3 and SiO 2 to generate a highly viscous B-Si-O-La protective layer, which blocks the ingress of oxygen.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Lijiang Guo,Yaxiao Wang,Lanying Tu,Jianqiang Li
Water activities of the CsCl–MgCl2–H2O ternary system and its sub-binary systems were elaborately measured by an isopiestic method at 298.15 K. The solubility of this ternary system at 298.15 K was also measured by two different methods, namely isothermal method and Flow-Cloud-Point method. The solubilities measured by the two different methods were consistent with each other. A Pitzer model was used to represent the thermodynamic properties and calculate the solubility isotherms for the CsCl–MgCl2–H2O ternary system at 298.15 K. Both the equal water activity lines and the solubility isotherms are calculated with parameters reported in literature. It was found that only the calculated equal water activity lines with the parameters reported by Scharge et al. are consistent with the experimental values of this work. However, all the calculated solubility isotherms deviated from the experimental data in this work. New set of ternary parameters were obtained by fitting the water activities and solubility data of this work. Using the new parameters, the calculated equal water activity lines and solubility isotherms agreed with experimental values measured in this work.
研究领域:
物理化学
·
无机化学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 6
·065504
·
IF 2.025
Xin Lin,Chaoyi Chen,Junqi Li,Gangan Wang,Deyang Ning
Brown corundum dust ash(BCFA) is an industrial solid waste from the brown corundum production process. The alkali metal is a key factor limiting its comprehensive use. Currently, BCFA is mainly stockpiled and occupies a large amount of land. Its fine particles are easy to cause air pollution. The addition of NH4HSO4 allows for the effective extraction of K from BCFA and the efficient use of BCFA. Under optimum conditions: NH4HSO4 to BCFA mass ratio of 1.2:1, the roasting temperature of 240 °C, roasting time of 2 h, water leaching time of 90 min, water leaching temperature of 65 °C water leaching liquid to solid ratio of 3:1, the leaching rate of K from BCFA reached 97%. The leachate was crystallised by evaporation to obtain K, N compound fertiliser for agricultural use. The leaching residue is mainly Al and Si, which can be used for the preparation of refractory materials, aluminium and silicon molecular sieves, construction materials and other raw materials.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 162
·期 4
·C197
·
IF 3.266
Gong Chen,Zhongning Shi,Jiangyu Yu,Junli Xu,Xianwei Hu,Zhaowen Wang,Bingliang Gao
The passivation of a graphite electrode in LiF–KF molten salt at 773 K was studied using cyclic voltammetry and electrochemical impedance spectroscopy. The anodic cyclic voltammogram showed that there are two oxidation current peaks at approximately 1.2 and 4.8 V vs. Pt quasi-reference electrode. We confirmed that carbon fluoride compounds are formed at the first current peak, while the last current peak was predominantly attributed to F2 evolution. The surfaces of the anodes used for electrolysis were analyzed at the potential of 1.0 V by X-ray photoelectron spectroscopy and Raman spectroscopy, and the anode atmosphere during the experiments was analyzed by gas chromatography. The results show that solid carbon fluoride compounds were formed in the graphite surface and no trace of gaseous carbon fluoride was detected. In addition, the active–passive transition of graphite electrode was observed in the EIS spectra recorded at 1.5 V. We confirmed the reason for the passivation of a graphite anode in LiF–KF molten salt: the formed carbon fluoride compounds layer blocks the transmission of F− anion from the electrolyte to the graphite electrode.
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Zhu Kaili,Shou Weiqiang,Jia Bingquan,Song Yuxiang,Wang Tao,Sun Licheng,Zhang Biaobiao
Acidic electrochemical CO 2 reduction (CO 2 RR) typically requires K + ions to create a local H + -depleted microenvironment, suppressing competing hydrogen evolution reaction (HER). Excessive localized K + causes salt precipitation, compromising electrolysis stability. Achieving stable operation with high Faradaic efficiency (FE) at low K + concentrations remains a crucial challenge for conventional nanomaterials. Inspired by water-trapping function of sponges, we design a three-dimensional interconnected porous cubic SnO 2 electrocatalyst (SnO 2 sponge) that confines OH – within porous channels to consume proton influx from the bulk, enabling durable acidic CO 2 RR towards formic acid (HCOOH). Theoretical and experimental studies reveal the SnO 2 sponge sustains substantially higher OH – concentration than dispersed SnO 2 nanoparticles. At pH 1.82, the SnO 2 sponge achieves 94.5% FE HCOOH at 800 mA cm –2 . With only 0.075 M K + , it retains 95.2% FE HCOOH at 400 mA cm –2 . Notably, it enables continuous HCOOH production at 400 mA cm –2 with 97.7% FE HCOOH for over 390 h without cleaning. This work provides a promising strategy for durable and efficient CO 2 RR in acidic media with low K + concentrations.
✓ 已验证
DOI
PubMed
高影响因子
DOKLADY PHYSICAL CHEMISTRY
·
2025
·Vol. 520
·期 1
·1-10
·
IF 1.5
Xingbing Yang,Zhang Tingting,Zhu Jing,Wu Qian,Zhang Qin,Li Jingyi,Jiang Tingting,Xiao Qin
In this work, the isothermal solution equilibrium method was used to examine the phase equilibrium of a ternary LiCl–LiBr–CH 3 OH system at 273 and 323 K. The solubilities of LiCl and LiBr in CH 3 OH at different temperatures were measured by chemical analysis. The chemical composition of the equilibrium solid phase was determined via the wet slag method combined with X-ray diffraction. Thus, the corresponding phase diagram was created, and the LiCl–LiBr–CH 3 OH and LiCl–LiBr–H 2 O ternary systems were compared at different temperatures. The results showed that the phase diagram characteristics of the LiCl–LiBr–CH 3 OH ternary system at 273 and 323 K were similar, with a saturation point, two univariable solubility curves and two solid phase crystallization zones; these zones represented the Li(Cl,Br) solid solution crystallization zone and LiCl single salt crystallization zone. The single salt of LiCl can be separated using crystallization filtration. LiBr has a salt-out effect on LiCl, but LiBr cannot be obtained. With increasing temperature, the contents of LiCl and LiBr at the saturation point of the LiCl–LiBr–CH 3 OH ternary system increase, and the solubilities of LiCl and LiBr in methanol gradually increase.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Wenchang Zhu,Hao Chen,Mengjie Zhang,Xingzhe Yang,Hongbin Feng
Defect engineering in oxides can effectively modulate their electric states and offers more active sites for electrocatalytic reactions. However, creating oxygen defects often require high processing temperatures or long-time consumption. Here, we exploited a simple and universal method to create defects in several metal oxides such as Co 3 O 4 , ZnO, SnO 2 , and CeO 2 using highly active liquid sodium-potassium (Na-K) alloy as the reducing agent at room temperature. To verify the available potential of this synthetic strategy, we choose defective Co 3 O 4 as an example and investigate its oxygen evolution reaction (OER) performance. The oxygen vacancies have a significant promotion effect on the OER activity and its starting potential is 1.54 V with a Tafel slope of 47.9 mV/dec, which is much lower than pristine Co 3 O 4 nanoparticles. Our method of creating defects in oxides may be used for many other related applications.
研究领域:
材料科学
·
电催化
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 43
·22874-22885
·
IF 11.301
Yamin Zhang,Zhongpu Wang,Deping Li,Qing Sun,Kangrong Lai,Kaikai Li,Qunhui Yuan,Xingjun Liu,Lijie Ci
Porous carbon has attracted extensive attention as an electrode material for various energy storage devices considering its advantages such as high theoretical capacitance/capacity, high conductivity, low cost and earth abundance. However, there still exist limitations hindering its practical applications, such as the tedious fabrication process, limited metal-ion transport kinetics and undesired structural deformation under harsh electrochemical conditions. Herein, we report a facile strategy, with calcium gluconate as the carbon source, to fabricate ultrathin porous carbon nanosheets. The as-prepared Ca-900 electrode delivers excellent K-ion storage performance including high reversible capacity (413.7 mA h g−1), superior rate capability (161.8 mA h g−1 at an ultrahigh current density of 5.0 A g−1) and ultra-stable long-term cycling stability (a high capacity retention ratio of ∼75.0% after 5500 cycles at 5.0 A g−1). Similarly, when being applied in Zn-ion hybrid capacitors, the Ca-900 electrode exhibits a high energy density of 75.22 W h kg−1, illustrating the application potential. Moreover, the origin of the fast and smooth metal-ion storage is also revealed by carefully designed consecutive CV measurements. Both K-ion/Zn-ion storage mechanisms are preliminarily revealed through ex situ measurements. Overall, considering the facile preparation strategy, unique structure, application flexibility and in-depth mechanistic investigations, it can be seen that this work will deepen the fundamental understanding of potassium-ion batteries and serve as a reference for the development of porous carbon materials for other highly efficient energy storage devices.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2020
·Vol. 40
·期 7
·1940-1948
·
IF 2.161
Li Jia-Xin,Chen Yu-Hong,Bai Zhang-Jun,Zhao Bao-Jun,Jiang Liang,Wu Lan-Er
Ta–W alloys have unique properties but their applications at high temperatures are restricted due to their poor oxidation resistances. The addition of Al and Ti decreases the oxidation rate of the alloy, as Al-contained protective oxide layer could be formed. In this study, ternary and quaternary Ta–W alloys containing Al and Ti were prepared by hot press sintering. The microstructures and oxidation behaviors of the alloys were studied at 1173 K. The results show that the oxidation kinetics of all alloys follows a parabolic law at short oxidation periods. After cyclic oxidation, the kinetics of quaternary alloys still obeys the parabolic law but that of ternary alloy has been changed into linear law kinetics after 8-h oxidation. For ternary alloy, an outer layer with dense and continuous alumina was formed during the initial stage, and phase transformation caused the oxides to peel off. By comparison, the quaternary alloys depicted continuously solid solution of the oxides layer. Overall, Al and Ti played key roles in oxidation degree and affected the oxidation kinetics of ternary and quaternary alloys.
研究领域:
材料科学
·
金属学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Hao-Jie Liang,Zhen-Yi Gu,Xue-Ying Zheng,Wen-Hao Li,Ling-Yun Zhu,Zhong-Hui Sun,Yun-Feng Meng,Hai-Yue Yu,Xian-Kun Hou,Xing-Long Wu
Graphite as a promising anode candidate of K-ion batteries (KIBs) has been increasingly studied currently, but corresponding rate performance and cycling stability are usually inferior to amorphous carbon materials. To protect the layer structure and further boost performance, tempura-like carbon/carbon nanocomposite of graphite@pitch-derived S-doped carbon (G@PSC) is designed and prepared by a facile and low-temperature modified molten salt method. This robust encapsulation structure makes their respective advantages complementary to each other, showing mutual promotion of electrochemical performances caused by synergy effect. As a result, the G@PSC electrode is applied in KIBs, delivering impressive rate capabilities (465, 408, 370, 332, 290, and 227 mA h g −1 at 0.05, 0.2, 0.5, 1, 2, and 5 A g −1 ) and ultralong cyclic stability (163 mA g −1 remaining even after 8000 cycles at 2 A g −1 ). On basis of ex-situ studies, the sectionalized K-storage mechanism with adsorption (pseudocapacitance caused by S doping)-intercalation (pitch-derived carbon and graphite) pattern is revealed. Moreover, the exact insights into remarkable rate performances are taken by electrochemical kinetics tests and density functional theory calculation. In a word, this study adopts a facile method to synthesize high-performance carbon/carbon nanocomposite and is of practical significance for development of carbonaceous anode in KIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Ziyan Lv,Rukang Li
Two new compounds K3TaP2O9 and Na3TaP2O9 were obtained by spontaneous crystallization with KH2PO4 and K2HPO4 or NaH2PO4 and Na2HPO4 as fluxes, respectively. K3TaP2O9 belongs to the P21/m space group of the monoclinic system, with cell parameters of a = 9.8912(7) Å, b = 7.1861(5) Å, c = 13.6457(9) Å, β = 94.047(2)°, and Z = 4. In contrast, Na3TaP2O9 pertains to the P212121 space group of the orthorhombic system, with cell parameters of a = 7.1241(7) Å, b = 9.3071(10) Å, c = 12.3752(13) Å, and Z = 4. Both of the structures feature the existence of the zigzag (TaP2O9)∞ chains with the −(O4Ta)–O–(TaO4)– connection. Also, two compounds have high transparency of about 90% in the 400–2500 nm range. Theoretical calculations and powder second-harmonic generation test show that the compound Na3TaP2O9 has a large band gap of 5.5 eV, a moderate powder second-harmonic generation response of 0.6 × KDP, and a large birefringence of 0.11.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）