ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Ping Jiang,Zhenyu Lei,Liang Chen,Xuecheng Shao,Xinmiao Liang,Jun Zhang,Yanchao Wang,Jiujun Zhang,Zhaoping Liu,Jiwen Feng
Vanadium hexacyanoferrate (VHCF) with an open-framework crystal structure is a promising cathode material for rechargeable aqueous metal-ion batteries owing to its high electrochemical performance and easy synthesis. In this paper, vanadium hexacyanoferrate cathodes were first used for constructing rechargeable aqueous sodium-ion batteries (VHCF/WO3) and tested in the new-type electrolyte (NaP-4.6) consisting of a polyethylene glycol (PEG)/H2O/NaClO4 electrolyte with a low H+ concentration (molar ratio of [H2O]/[Na+] is 4.6), which has high stability at a high current density as high as 1000 mA g–1 with a capacity retention of 90.3% after 2000 cycles at high coulombic efficiency (above 97.8%). To understand their outstanding performance, the proton-assisted sodium-ion storage mechanism and interphase chemistry of VHCF are investigated by solid-state NMR (ssNMR) technology. It is suggested that the H+ storage reaction is accompanied by the redox of vanadium atoms and Na+ intercalation is accompanied by the redox of iron atoms. It is also observed that the complex of polyethylene glycol (PEG) with Na+ (PEG–Na+) exists on the VHCF surface, which facilitates the stability of VHCF and promotes the alkali-ion transfer at a high current density. The results of the ssNMR study offer new insights into the intercalation chemistry of Prussian blue analogues with open-framework-structured compounds, which can greatly broaden our horizons for battery research.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 19
·16325-16329
·
IF 2.324
Guo Biao,Diao Wenyu,Yuan Tingting,Liu Yuan,Yuan Qi,Li Guannan,Yang Jingang
Carbon-coating Na 3 V 2 (PO 4 ) 2 F 3 nanoparticles (NVPF@C NP) were prepared by a hydrothermal assisted sol–gel method and applied as cathode materials for Na-ion batteries. The as-prepared nanocomposites were composed of Na 3 V 2 (PO 4 ) 2 F 3 nanoparticles with a typical size of ~ 100 nm and an amorphous carbon layer with the thickness of ~ 5 nm. Cyclic voltammetry, rate and cycling, and electrochemical impedance spectroscopy tests were used to discuss the effect of carbon coating and nanostructure. Results display that the as-prepared NVPF@C NP demonstrates a higher rate capability and better long cycling performance compared with bare Na 3 V 2 (PO 4 ) 2 F 3 bulk (72 mA h g −1 at 10 C vs 39 mA h g −1 at 10 and 1 C capacity retention of 95% vs 88% after 50 cycles). The remarking electrode performance was attributed to the combination of nanostructure and carbon coating, which can provide short Na-ion diffusion distance and rapid electron migration.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yunhao Zhu,Jie Shao,Yu Jiang,Kejia Zhang,Qiang Shi,Qunting Qu,Honghe Zheng
Alloying-type anodes exhibit unique advantages in terms of capacity and working potentials for practical application in sodium-ion batteries (SIBs). Sb-based nanocrystallites are prepared through a low-cost and large-scalable route by reducing the industrial antimony white (Sb 2 O 3 ) in aqueous solutions under mild conditions and studied as the anode materials of SIBs. Compared with the pristine Sb 2 O 3 and partially reduced Sb/Sb 2 O 3 hybrid, the totally reduced product (pure Sb nanocrystallite) manifests the most steady desodiation potential, highest capacity at around 0.75 V vs. Na + /Na, highest initial Coulombic efficiency, longest cycling life, and fastest charge/discharge rate. The different electrochemical performance of as-prepared materials is discussed from the perspective of Na-storage mechanisms. The results demonstrate that the as-prepared pure Sb nanocrystallite is more promising than its oxides for practical application in SIBs.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Cell Reports Physical Science
·
2022
·
IF 7.832
Bowen Xu,Da Zhang,Shilei Chang,Minjie Hou,Chao Peng,Dongfeng Xue,Bin Yang,Yong Lei,Feng Liang
Rechargeable Na-CO 2 batteries are promising energy-storage devices due to their high energy density, environmental friendliness, and cost effectiveness. However, the insulating nature and irreversibility of the Na 2 CO 3 discharge product cause large polarization and poor cyclicity. Here, we report a reversible quasi-solid-state Na-CO 2 battery that is constructed by the synergistic action of a Co-encapsulated N-doped carbon framework catalyst and gel electrolyte to ensure the formation of a highly reversible Na 2 C 2 O 4 discharge product. Experiments and density functional theory calculations indicate that the electron-agglomeration effect of Co nanoparticles enhances CO 2 adsorption and lowers energy barrier, as well as promotes Na 2 C 2 O 4 generation. A gel electrolyte containing an imidazole organic cation is used to inhibit the decomposition of the thermodynamically unstable Na 2 C 2 O 4 . The fabricated Na-CO 2 battery exhibits a high discharge capacity of 3,094 mAh g −1 , a high-rate performance of 1,777 mAh g −1 at a current density of 0.5 mA cm −2 , and excellent cycling performance of 366 cycles (2,200 h).
研究领域:
材料科学
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电化学
·
能源存储技术
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
De Ao,Fujiang Geng,Mao Ye,Shuangjie Yuan,Fanpeng Meng,Jinxiao Bao,Zibo Yang,Zhihua Qiao
The development of high-performance membranes for CO 2 /N 2 separation remains challenging due to the trade-off between permeability and selectivity. A novel strategy has been developed to fabricate K,Na-A zeolite/ZIF-62 crystal-glass composite membranes through a melt-quenching process. The high viscosity of molten ZIF-62 enables the uniform distribution of zeolite particles, preventing their aggregation and sedimentation. The synergistic effect between the highly porous K,Na-A zeolite and the continuous ZIF-62 glass matrix leads to enhanced membrane porosity and efficient gas transport channels. Benefiting from the molecular sieving effect of K,Na-A zeolite and the excellent interfacial compatibility of ZIF-62 glass matrix, the composite membranes demonstrate superior gas separation capability. Systematic investigation revealed that the optimized a g (ZIF-62) 0.7 /(K,Na-A) 0.3 membrane exhibited remarkable CO 2 separation performance with a CO 2 permeability of 58,824 barrer and a CO 2 /N 2 selectivity of 43.1, surpassing the 2019 upper bound. This facile and scalable strategy opens up new opportunities for developing high-performance composite membranes for practical gas separation applications.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 11
·5945-5955
·
IF 11.9
Yani Liu,Yu Wang,Haoqiang Wang,Shuming Dou,Huijie Tian,Wei Gan,Qunhui Yuan
Aiming to achieve a metallic bismuth (Bi) anode with constant accommodation of volume change, a dynamic template strategy is proposed for fabrication of a highly adjustable Bi aerogel anode. In the presence of the NaBH4 reductant, the in situ generated hydrogen bubbles served as dynamic templates to direct the reduction, nucleation and growth of Bi nanoparticles, which are subsequently merged into a three-dimensional porous skeleton. The unique 3D porous Bi skeleton ensures the rapid alloying/dealloying of sodium ions and efficient electrolyte infiltration. Its excellent structural integrity and buffering capacity for volume fluctuation lead to superior rate performance (330.6 mA h g−1 at 30C) and long-term stability (339.1 mA h g−1 after 2000 cycles at 10C) in a half cell. When coupled with a Na3V2(PO4)3 cathode, the Na3V2(PO4)3//Bi full cell exhibits appealing energy density and power density. This work demonstrates a new idea for constructing highly reliable alloy-type anodes for high-rate energy storage systems.
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2022
·Vol. 24
·期 5
·2240-2248
·
IF 11.034
Yanlong Qi,Ruilin Feng,Shijun Liu,Long Cui,Quanquan Dai,Chenxi Bai
Functionalized monomers are of utmost importance in producing new polymers and smart materials. Herein, a two-step approach involving heterogeneous catalysis was developed to produce a functionalized monomer (2-vinylfuran) from bio-based furfural, giving an overall yield of 89%. Economic analysis suggests that this facile approach incurs much lower costs, and its practicality improves the availability of 2-vinylfuran. This is due to the delicate structure of the optimized 4Na5Ce/SiO2, where Na species are present at the oxygen vacancies of the ceria that protect the catalyst structure from collapse, and the catalyst consequently displays excellent performance. Density functional theory (DFT) calculations revealed that the reaction occurs on the Na and Ce species. The adsorption of a furan group onto Na led to side reactions, which were suppressed in the presence of Ce, resulting in higher selectivity. Finally, a polymer based on 2-vinylfuran was prepared, which shows good surface properties and thermodynamic stability.
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高影响因子
Energy & Environmental Materials
·
2022
·Vol. 6
·期 3
·e12364
·
IF 13.443
Liang Lu,Chunwen Sun,Jian Hao,Zelin Wang,Sergio F. Mayer,Maria Teresa Fernández-Díaz,José Antonio Alonso,Bingsuo Zou
The recovery and utilization of carbon dioxide (CO 2 ) is the key to achieve the targets of peak carbon dioxide emissions and carbon neutrality. The Na-CO 2 battery made with cheap alkali metal sodium and greenhouse gas CO 2 is an effective strategy to consume CO 2 and store clean renewable energy. However, the liquid electrolyte volatilization in the open battery system and inevitable dendrite growth restrict the application of Na-CO 2 batteries. In this work, magnesium-doped Na 3 Zr 2 Si 2 PO 12 (NZSP) was studied as a solid electrolyte for solid-state Na-CO 2 batteries. The ionic conductivity of Na 3.2 Zr 1.9 Mg 0.1 Si 2 PO 12 reaches 1.16 mS cm −1 at room temperature by replacing Zr ions in Na 3 Zr 2 Si 2 PO 12 with Mg ions, and the structural changes are analyzed by neutron powder diffraction. The composite electrolyte consisting of highly conductive Na 3.2 Zr 1.9 Mg 0.1 Si 2 PO 12 and high processability poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) is utilized for the first time to assemble a solid-state Na-CO 2 battery. The cell shows a full discharge capacity of 7720 mAh g −1 at 200 mA g −1 . The middle gap voltage is lower than 2 V after 120 cycles at 200 mA g −1 and at a cut-off capacity of 500 mAh g −1 . This work demonstrates a promising strategy to design high-performance solid-state Na-CO 2 batteries.
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2022
·
IF 5.204
Mei Li,Tianxiang Deng,Haiyang Ding,Na Yao,Lina Xu,Xiaohua Yang,Jianling Xia,Shouhai Li
In this work, the adduct of maleic anhydride and methyl eleostearate (MAME) and dimer fatty acid (DFA) were converted to the sodium and zinc salts (L-Zn-MAME, L-Na-MAME, L-Zn-DFA, and L-Na-DFA), respectively, which were subsequently turned into Na/Zn composite liquid stabilizers(LTS-Na/Zn-MAME and LTS-Na/Zn-DFA) by formula combination. Na salts, Zn salts and mixed Na/Zn salts from these fatty acid salts were used as thermal stabilizers for poly(vinyl chloride) (PVC). The chemical structures of MAME , DFA, and their liquid zinc and sodium salts were verified using Fourier transform infrared (FTIR) spectra. Thermal stability and mechanical properties of the sodium and zinc salts, and their Na/Zn composite liquid stabilizers derived from MAME and DFA for PVC were investigated using discoloration and dynamic mechanical analyses, TGA-FTIR-MS, thermal decomposition kinetics, and Congo red and tensile tests. Thermal stability of pure PVC is poor, but membrane thermal stability can be improved by integrating thermal stabilizers. Results show that L-Na-MAME has an outstanding synergistic effect with the commercial general calcium/zinc stearate composite heat stabilizer(CaSt 2 /ZnSt 2 ). CaSt 2 /ZnSt 2 /LTS-Na-MAME, LTS-Na/Zn-MAME and CaSt 2 /LTS-Zn-DFA/LTS-Na-DFA also have a better heat-stabilizing impact on PVC than CaSt 2 /ZnSt 2 , especially LTS-Na/Zn-MAME can more effectively enhance the primary coloring of PVC. In comparison to blank PVC and PVC/CaSt 2 /ZnSt 2 , both PVC/LTS-Na/Zn-MAME and PVC/LTS-Na/Zn-DFA display a larger elongation at break and acceptable tensile strength. The new stabilizers can largely enhance the heat stability of PVC resins, endowing PVC products with good plasticization performance, and can fully or partially replace the general calcium zinc stearate composite heat stabilizer and other heat stabilization products.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Deliang Cheng,Ankai Wei,Leyi Ye,Guodong Xu,Liang Tan,Bin Lu,Yiwang Chen
Alloy-type materials have aroused wide concern as potential anodes for Na-ion batteries (NIBs) because of their high theoretical capacities and suitable Na-storage potentials. Fabricating composites with carbon matrixes is the most common strategy to solve their key issues of large volume expansion and sluggish reaction kinetics. However, it is still challenging to achieve strong interfacial interaction between alloy-type materials and carbon matrixes, thus largely improving the buffering effect of carbon matrixes on volume change. Herein, we have developed a SnSb-graphene (SnSb-G) hybrid anode with interfacial Sn/Sb–C bonding via a plasma-assisted mechanochemical method. The Sn/Sb–C bonding can enhance the interfacial interaction between SnSb and graphene, which inhibits the detachment of SnSb nanoparticles from graphene upon cycling and promotes the buffering effect of graphene. Meanwhile, the strong interfacial bonding of conductive graphene network to SnSb nanoparticles can greatly facilitate the Na+ storage/transfer along the SnSb/graphene interface, rendering electrode superior performance at high rates. Therefore, as an anode for NIBs, the SnSb-G composite exhibits superb rate capability (301.5 mAh g–1 at 10.0 A g–1) and cyclic stability (85.8%/89.1% capacity retentions at 1.0/2.0 A g–1 after 1000 cycles). Moreover, the assembled full cell delivers a high energy density of 145 Wh kg–1 and superior cycling performance of 333.6 mAh g–1 after 200 cycles, demonstrating its potential for practical application. This work provides new insight to achieve high-performance alloy-type anodes for practical NIBs.
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INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yuanyuan Li,Hongzheng Pu,Ying Zhou,Fengling Yin,Siwei Chen,Yurou Tang,Pengfei Jiang,Ya Wu,Zhenhua Zhang,Dingfeng Yang
Cation disorder in hydroxide-based perovskites remains relatively under-researched. In this work, novel hydroxide-based perovskite Sn1/3Na2/3Sn(OH)6 was first fabricated by a direct hydrothermal method, and its ability to photodegrade 2,4-dichlorophenol was evaluated. The synthesized photocatalyst is isostructural with MSn(OH)6 (M = Mg, Ca, Sr, Mn, Fe, Co, Ni, or Zn), where the M site is occupied by disordered Sn4+/Na+. Sn1/3Na2/3Sn(OH)6 exhibits outstanding photocatalytic activity under ultraviolet light. Specifically, 99% of 2,4-DCP is photodegraded in 40 min, with approximately 94% of its total chlorine content converted to Cl– anions. Radical trapping experiments indicated that superoxide radical anions (·O2–) play a critical role during the photocatalytic process. Finally, liquid chromatography–tandem mass spectrometry was conducted to monitor the photocatalytic intermediates. Overall, our findings demonstrate that hydroxide-based perovskites with cation disorder show promise for application in photocatalysis.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 11
·14128-14136
·
IF 2.478
Song Fengmin,Zhang Gongguo
A series of double-perovskite orange–red-emitting Ca (3−2 x ) Sm x Na x TeO 6 ( x = 0.01–0.25) phosphors have been synthesized via high-temperature method. The single-phase and orthorhombic structure of Ca 3 TeO 6 :Sm 3+ , Na + phosphors was confirmed by X-ray powder diffraction. Under 405 nm excitation, Ca 3 TeO 6 :Sm 3+ , Na + phosphors emitted a series of orange–red emission due to the transition of Sm 3+ from 4 G 5/2 to 6 H J/2 ( J = 5, 7, 9, and 11). The optimal Sm 3+ -doping concentration of Ca (3−2 x ) Sm x Na x TeO 6 ( x = 0.01–0.25) was x = 0.10. The thermal-quenching temperature of Ca 3 TeO 6 :0.10Sm 3+ , 0.10Na + phosphor was above 480 K. A white light-emitting diode (w-LED) based on 410 nm UV chip was successfully fabricated, and it presented a good correlated color temperature and a high color-rendering index (R a ). Therefore, orange–red-emitting Ca 3 TeO 6 :Sm 3+ , Na + phosphors have potential applications in UV-based w-LEDs.
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