Journal of Materials Chemistry A
·
2025
·
IF 9.5
Wenwen Yin,Jiawei Ma,Yanyan Li,Qing Cheng,Bernt Johannessen,Fangxi Xie,Mingmei Wu
Exploiting bifunctional and highly efficient electrocatalysts that can facilitate the reversible formation and decomposition of discharge products is crucial for rechargeable Na-air batteries (SABs). However, restricted by scaling relations, air cathodes based on single metal systems usually exhibit inferior activity and fail to achieve a stable and long cycle life of Na-air batteries. Dual single-atom catalysts (DACs) with two metal sites can circumvent the scaling relations and endow the single-atom catalysts with superior activity. Herein, we present a hollow carbon microsphere loaded with Ni and Fe single atoms (Ni-HCMs-Fe) as a demonstration of DAC air cathodes for SABs. Notably, Na-air batteries with Ni-HCMs-Fe as an air cathode can achieve a low overpotential gap of 530 mV, a high specific capacity of 5382.9 mAh g−1, and an ultralong cycle life of over 450 cycles (1800 hours) with NaO2 as the main discharge product. Due to the different adsorption energies between oxygenated intermediates and Ni/Fe sites, the Ni-HCMs-Fe catalysts can break through the scaling relations and display optimized binding ability towards intermediates, thus boosting the reversible formation and decomposition of NaO2 in SABs. This work pioneers the use of DACs in SABs, paving the way for their practical applications.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Xi-xi Sun,Ruichen Li,Zhiwei Yang,Nan Zhang,Chao Wu,Junhua Li,Yulin Chen,Qiang Chen,Jing Zhang,Hongjian Yan,Xiang Lv,Jiagang Wu
The strategy of modulating polarization rotation of potassium sodium-niobate ((K 0.5 Na 0.5 )NbO 3 , KNN) lead-free piezoelectric materials was reported to boost piezoelectric properties and resultant piezocatalytic activities. The effectiveness of modulating polarization rotation was proved by degrading Rhodamine B (RhB) using three KNN-based samples with different phase structures (i.e., orthorhombic (O) phase, orthorhombic-tetragonal (O-T) coexistence phase, and rhombohedral-orthorhombic-tetragonal (R-O-T) coexistence phase). Poled samples with the R-O-T coexistence phase show a reaction rate constant of 0.091 min −1 owing to the easiest polarization rotation, 2.12 times more than that of poled O-phase featured samples with the most difficult polarization rotation. Enhanced piezocatalytic activities primarily originate from the easier polarization rotation and improved carrier concentration, accompanied by the trace of the mechano-charge generation. Therefore, modulating polarization rotation effectively boosts piezocatalysis of KNN-based materials, promising for harnessing natural energy and disease treatment.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Dejian Zhao,Zhihong Wang,Shuaishuai Lyu,Yunhao Liu,Shaohui Xiong,Yingtian Zhang,Yu Pan,Qingpeng Cheng,Xingang Li
Non-classical Fischer–Tropsch to olefins (FTO) is a crucial yet highly complex industrial reaction that enables the direct conversion of syngas, derived from renewable feedstocks such as biomass, municipal solid waste, or captured CO 2 , into long-chain olefins (C 5+ = ) via a carbide mechanism. Here, we systemically investigate mechanisms and performance of Na-modified Ru/TiO 2 catalysts in non-classical FTO, and experimentally discover a new CO insertion pathway. Our findings show that Na modification alters the adsorption and activation behaviors of CO, H 2 and intermediates, eventually manipulating reaction mechanisms. The Ru/TiO 2 catalyst with less Na exhibits high CO dissociation and C-C coupling abilities but a poor dehydrogenation ability, which mainly obeys the carbide mechanism, benefiting to produce C 5+ alkanes, rather than olefins. However, excessive addition of Na would primarily make the Ru/TiO 2 catalyst alternately follow the CO insertion mechanism, preferring to produce short olefines (C 2-4 = ) because of the poor C-C coupling ability. After rational coordination of the two pathways through regulating the Na loadings, the 0.5NaRu/TiO 2 catalyst robustly exhibits ultra-high C 5+ = selectivity (80.9%) and impressive C 5+ = space time yield (1.68 × 10 -2 mol CO g cat -1 h -1 ) at 260 °C, without deactivation for over 100 h. These findings not only provide fundamental insights into the underlying mechanisms for long-chain olefin synthesis, but also offer theoretical guidance for developing advanced catalysts for industrial applications.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xin Chen,Jingyao Zeng,Jiahui Wu,Guorong Hu,Ke Du,Zhongdong Peng,Yanbing Cao
Na 4 Fe 3 (PO 4 ) 2 (P 2 O 7 ) (NFPP) is a promising cathode material for sodium-ion batteries due to its low cost, high safety, and long cycle life. However, its poor electronic conductivity and air instability hinder practical application, and the issue of air stability has received limited attention. Herein, the hydrolysis behavior of NFPP/C in humid air is systematically investigated. Based on the identified degradation mechanism, a surface reconstruction strategy is proposed via in situ liquid-phase encapsulation of nanostructured Na 3 (VO) 2 PO 4 F (NVPOF). During heat treatment, VO x in NVPOF catalyzes carbon ordering and enables partial V doping into the NFPP surface lattice, thereby modulating surface chemistry, crystal and electronic structure of NFPP. Additionally, the aligned NVPOF/NFPP heterostructure with minimal lattice mismatch forms a built-in electric field, reducing Na⁺ diffusion barriers and interfacial stress. As a result, the Na3 site is activated, leading to significantly enhanced electrochemical performance. The optimized NFPP/NVPOF/C composite delivers excellent rate capability, with a discharge capacity of 126.55 mAh g −1 at 0.1C and 114.40 mAh g −1 at 10C. This work addresses the overlooked air stability issue of NFPP and highlights the importance of surface reconstruction coupled with interface engineering.
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高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Chengzhao Luo,Qinyi Li,Dongyang Shen,Ronghong Zheng,Dong Huang,Yu Chen
All-solid-state batteries suffer from drastic interfacial reactions between the solid electrolyte and electrode, which restricts the performance of the full cell. Herein, a hybrid solid polymer electrolyte with high ionic conductivity and stability has been fabricated by in-situ polymerization of poly(ethylene glycol) diacrylate (PEGDA) on glass fiber matrix, followed by polyethylene glycol (PEG) infiltration . Such hybrid electrolyte, namely GF@PEGDA@PEG (GFPP), is featured with an interconnecting ionic conducting network and demonstrates high ionic conductivities of 0.8 × 10 −4 S cm −1 at 20 °C and 4.5 × 10 −3 S cm −1 at 60 °C. The ex-situ Attenuated Total Reflectance-Fourier Transform Infrared spectroscopy (ATR-FTIR) of Na/GFPP/Na symmetrical battery proves the excellent stability of GFPP. Furthermore, in-situ Electrochemical Impedance Spectroscopy (EIS) analysis and in-situ Raman spectra confirm the enhanced interfacial dynamics achieved by GFPP, being conducive to the intercalation/deintercalation of Na + . Meanwhile, the optical microscope and X-ray photoelectron spectroscopy (XPS) demonstrate the formation of a stable SEI film and limited interfacial side reaction by the incorporation of GFPP. Full sodium metal batteries based on GFPP have been assembled and demonstrated satisfactory electrochemical performance. After being tested for 1100 cycles at a rate of 0.3 C, the Coulombic efficiency of Na 3 V 2 (PO 4 ) 3 (NVP) /GFPP/Na full cell remains at almost 99%, with a capacity retention of 91.4%.
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高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Dongxiao Wang,Shuyin Xu,Jianlin Wang,Xiaohui Rong,Feiyu Zhou,Lifen Wang,Xuedong Bai,Bingan Lu,Chengjun Zhu,Yuesheng Wang,Yong-sheng Hu
Room-temperature Na-ion batteries have attracted great interest for over a decade owing to their natural abundance and similar intercalation chemistry with Li-ion. However, due to the uncontrolled decomposition of electrolyte and formation of solid electrolyte interphase, the large majority of sodium anode materials exhibit extremely low initial Coulombic efficiency and unsatisfactory cycling stability. Here we introduce a novel layered material, P2-Na 0.547 [M g 0.25 M n 0.75 ]O 2 , as an SEI-free negative electrode. This material, delivers a reversible capacity of 126 mAh g −1 with a high initial Coulombic efficiency of 108%, and capacity retention of ∼80% after 1000 cycles at 4C rate. Pairing with Na 3 V 2 (PO 4 ) 3 cathode, excellent rate performance of ∼60% capability at 15C, and extra-high initial Coulombic efficiency of 97% are achieved, all attributed to the SEI-free feature of Na 0.547 [M g 0.25 M n 0.75 ]O 2 . These results demonstrate the practical potential of our SEI-free anode material for high-power and long-life Na-ion batteries.
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高影响因子
TRANSACTIONS OF TIANJIN UNIVERSITY
·
2025
·Vol. 31
·期 3
·278-291
·
IF 8.5
Chi Shuxiu,Wang Chenhui,Liao Jie,Sun Peng,Fei Yaohan,Han You,Zhang Jinli,Wu Jiangjiexing,Li Wei
Aiming at inhibiting the irreversible P2–O2 phase transition of conventional P2-type cathode materials at high voltage and enhancing the cycling stability of sodium-ion batteries, in this article, based on a strategy of adjusting the Na + ion occupancy within the crystal structure, Na 0.67 Ni 0.33 Mn 0.67– x Fe x O 2 (NM– x Fe, x = 0.10, 0.15, 0.20) cathode materials were synthesized by high shear mixer (HSM)-assisted co-precipitation method and evaluated the electrochemical performance at high voltage (4.35 V). The optimal sample NM–0.15Fe exhibits an initial discharge capacity of 130.8 mAh/g (0.1 C), with exceptional retention of 95.9% after 100 cycles (1 C). XRD analysis reveals that Fe intercalation promotes the more amount of Nae-similar occupation; the Nae/Naf ratio equals 1.93 for NM–0.15Fe versus 1.62 for NM, which enhances Na + diffusion kinetics, as confirmed by GITT tests. Through characterizations of in situ XRD, XPS, HRTEM, CV, etc., it is illustrated that the Fe 3+ intercalation can effectively disrupt the Na + /vacancy ordering and inhibit the harmful P2–O2 phase transition, and then improve the cycling stability of the cathode. DFT calculations disclose that intercalated Fe can reduce the electron densities of adjacent transition metallic elements, generating more repulsive forces impacted on sodium and consequently appearance of more Nae sites, leading to a lower Na + diffusion energy barrier. Such strategy of modulating Na occupation sites in crystal structure is conducive to the development of low-cost and high-performance layered cathode materials for sodium-ion batteries.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 22
·4041
·
IF 5.719
Tao Zhang,Yan Liu,Guihuan Chen,Hengjun Liu,Yuanyuan Han,Shuhao Zhai,Leqing Zhang,Yuanyuan Pan,Qinghao Li,Qiang Li
Transition metal fluoride (TMF) conversion cathodes, with high energy density, are recognized as promising candidates for next-generation high-energy Li/Na-ion batteries (LIBs/SIBs). Unfortunately, the poor electronic conductivity and detrimental active material dissolution of TMFs seriously limit the performance of TMF-LIBs/SIBs. A variety of FeF3-based composites are designed to improve their electrochemical characteristics. However, the storage mechanism of the conversion-type cathode for Li+and Na+co-storage is still unclear. Here, the storage mechanism of honeycomb iron (III) fluoride and carbon (FeF3@C) as a general cathode for LIBs/SIBs is analyzed by kinetics. In addition, the FeF3@C cathode shows high electrochemical performance in a full-cell system. The results show that the honeycomb FeF3@C shows excellent long-term cycle stability in LIBs (208.3 mA h g−1at 1.0 C after 100 cycles with a capacity retention of 98.1%). As a cathode of SIBs, the rate performance is unexpectedly stable. The kinetic analysis reveals that the FeF3@C cathode exhibit distinct ion-dependent charge storage mechanisms and exceptional long-durability cyclic performance in the storage of Li+/Na+, benefiting from the synergistic contribution of pseudocapacitive and reversible redox behavior. The work deepens the understanding of the conversion-type cathode in Li+/Na+storage.Keywords:full-cell;kinetic analysis;metal fluorides;storage mechanism
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
·
2023
·Vol. 78
·期 10
·921-926
·
IF 1.8
Cong Liu,Junshen Xing,Zheng Liu,Wenlin Feng
BaSr 2 (PO 4 ) 2 : 4 %Eu 3+ , 4 % A ( A = Li + , Na + , K + ) phosphors were prepared by high-temperature solid-phase method. The crystal structure, photoluminescence properties, thermal stability, chromaticity coordinates, and fluorescence lifetime of the samples were investigated. The excitation and emission spectra of the samples are broadbands and the maximum peak of the emission spectrum is located at 619 nm. Among three charge compensators, the luminescence intensity is optimal for Li + co-doping case, and the quenching temperature of the typical sample is about 500 K. the fluorescence lifetime
τ
is 1469.6 ns, and the chromaticity coordinates exhibit a strong red emission. The present phosphor has a potential application for white light-emitting diodes (LEDs) under the near-ultra violet (n-UV) light excitation.
研究领域:
材料科学
·
光学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Xiyong Chen,Mingxin Zhou,Junzuo Shi,Tianquan Liang,Jie Zeng,Xia Yan,Nengneng luo,Weizhou Li,Yuezhou Wei
The effect of nominal Na/Bi ratio on the microstructure and electrical conductivity of A-site fully stoichiometric sodium bismuth titanates , Na 0.5+ x Bi 0.5− x TiO 3− δ , was investigated in this study. Bulk samples with x = 0, 0.01, 0.03, 0.05, 0.07, and 0.1 were prepared by conventional solid state reaction method. The as-calcined powders primarily exhibited the perovskite structure, which was identified by X-ray diffraction. Electron microscopic investigation of the sintered samples, however, revealed the presence of secondary phases, the amounts of which were found to increase with increasing Na/Bi ratio. Further elemental analysis by energy dispersive spectroscopy indicated that the secondary phases were mainly composed of sodium titanates with different Na/Ti ratios. The grain bulk and grain boundary conductivities of Na 0.5+ x Bi 0.5− x TiO 3− δ , measured by two-probe AC electrochemical impedance spectroscopy , significantly increased with increasing Na/Bi ratio when x ≤ 0.03, but remained almost constant at higher x . The synergetic effect of oxygen vacancy creation, grain size reduction, and secondary phase formation on the variation in the conductivity upon increasing the nominal Na/Bi ratio in Na 0.5+ x Bi 0.5− x TiO 3− δ was discussed.
研究领域:
材料科学
·
固态化学
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高影响因子
Nano Research
·
2017
·Vol. 10
·期 5
·1794-1803
·
IF 7.354
Pan Jun,Wang Nana,Zhou Yanli,Yang Xianfeng,Zhou Wenyao,Qian Yitai,Yang Jian
High-capacity anode materials are highly desirable for sodium ion batteries. Here, a porous Sb/Sb 2 O 3 nanocomposite is successfully synthesized by the mild oxidization of Sb nanocrystals in air. In the composite, Sb contributes good conductivity and Sb 2 O 3 improves cycling stability, particularly within the voltage window of 0.02–1.5 V. It remains at a reversible capacity of 540 mAh·g –1 after 180 cycles at 0.66 A·g –1 . Even at 10 A·g –1 , the reversible capacity is still preserved at 412 mAh·g –1 , equivalent to 71.6% of that at 0.066 A·g –1 . These results are much better than Sb nanocrystals with a similar size and structure. Expanding the voltage window to 0.02–2.5 V includes the conversion reaction between Sb 2 O 3 and Sb into the discharge/charge profiles. This would induce a large volume change and high structure strain/stress, deteriorating the cycling stability. The identification of a proper voltage window for Sb/Sb 2 O 3 paves the way for its development in sodium ion batteries.
研究领域:
材料科学
·
能源存储与转换
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高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 27
·10719-10726
·
IF 8.262
Yong Jiang,Yazhi Feng,Baojuan Xi,Shuangshuang Kai,Kan Mi,Jinkui Feng,Junhao Zhang,Shenglin Xiong
Well-distributed graphene sheets doped with nitrogen (NGSs) were prepared via a thermal annealing strategy with the use of cyanamide. The cyanamide can efficiently restrain the conglomeration of the resultant graphene sheets and simultaneously ensure the doping of nitrogen. Followed by the next-step of the low-temperature solvothermal route, uniform ultrasmall tin sulfide (SnS2) nanocrystals were readily grown on the preformed NGS (denoted as SnS2–NGS). Benefiting from the synergistic function between NGSs and SnS2, the resultant composites exhibit excellent electrochemical performance. When evaluated as anode materials for lithium-ion batteries (LIBs), SnS2–NGS with a moderate weight ratio of SnS2 delivers outstanding electrochemical performance giving a high reversible capacity of 1407 mA h g−1 at 200 mA g−1 after 120 cycles. The composites can also maintain a reversible capacity of about 200 mA h g−1 at a high current density of 10 A g−1. The lithium-ion storage ability of the prepared SnS2–NGS electrode is at the top rank in comparison with those of other studies. The obtained composites also achieved good sodium storage ability.
研究领域:
材料科学
·
能源存储
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高影响因子
危险品化学品经营许可证（带存储）