RSC Advances
·
2015
·Vol. 5
·期 20
·15431-15437
·
IF 3.84
Liping Zhao,Li Qi,Hongyu Wang
Molybdenum disulfide–carbon composite (MoS2–C) sample has been prepared by a hydrothermal method using Na2MoO4, CH4N2S and glucose as starting materials and then calcined at 800 °C in an N2/H2 mixed atmosphere. X-ray diffraction and N2 adsorption–desorption tests have been employed to characterize its crystal and pore structure. SEM, TEM and TG methods have been used to investigate its morphology and the weight ratio of carbon. The MoS2–C can be used as the negative electrode for electric energy storage devices using Na+-based organic electrolytes. The charge storage mechanism at the MoS2–C negative electrode has been investigated. Electric energy storage devices using MoS2–C/graphite have been constructed and their electrochemical performance has been studied.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
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功能复合材料
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2025
·
IF 3.3
Xingru Chen,Longhui Nie,Xueling Li
Doping is an effective way to improve the separation efficiency of photogenerated carriers, widen visible light adsorption, and tune the band structure of carbon nitride (g-C 3 N 4 , CN). Herein, Na, S co-doped CN (CNNS- x ) photocatalysts were successfully prepared by a one-step thermal polymerization method using urea and sodium thiosulfate as the raw materials. The incorporation of Na and S not only improves the visible light response intensity and photogenerated carrier separation efficiency of CN but also enhances oxygen adsorption capacity and optimizes the energy band structure of the CN. The optimal CNNS-2.5 photocatalyst revealed a significantly enhanced photocatalytic performance and yielded 4.85 mM (24.25 mmol·g −1 ·h −1 ) H 2 O 2 in 1 h under visible light irradiation. The above yield is 4.71 times that of CN. It also revealed good stability in four cycles. The active species capture test and ESR revealed that the photocatalytic mechanism for H 2 O 2 production on CNNS-2.5 was a two-step, single-electron oxygen reduction reaction (ORR) pathway.
研究领域:
材料科学
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光催化
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能量转换
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环境化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Qu Sitian,Lin Tao,Yin Xuefeng,Xing Luyi,Li Chenyang,Peng Guoqiang
The rapid advancement of information technology has led to an increase in electromagnetic interference (EMI) issues, as electronic devices are now widely utilized, requiring materials with greater versatility. This study developed an efficient preparation method utilizing alternating vacuum filtration (AVF) technology to overcome this issue. Through the precise control of the deposition sequence of cellulose nanofibers (CNF)/Na-bentonite (NB) and MXene conductive layers, this study successfully prepared CNF/NB–MXene composite films with a well-structured alternating layered structure. The composite film exhibited a distinctive "brick–mortar" architecture, imparting favorable mechanical properties (i.e., 8.17 MPa tensile strength). Measuring 41 μm thick, the composite film exhibited a conductivity of 189.6 S m –1 , along with EMI shielding effectiveness (SE) of 34.3 dB and SE per unit thickness (SE/t) of 8365.85 dB cm –1 in the X-band. Furthermore, the composite film demonstrated a high limiting oxygen index (LOI) of 36.5% and a residual carbon content exceeding 70%, which indicated exceptional flame retardancy. Consequently, the alternating layered composite film exhibited superior EMI performance and flame-retardant performance, making it particularly advantageous in harsh environments such as high temperatures.
研究领域:
材料科学
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纳米技术
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电磁干扰屏蔽
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聚合物复合材料
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防火材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Lv Hu,Hui Li,Fang Chen,Yating Liu,Jinzhu Wang,Cheng Ma
Chloride solid electrolytes possess multiple advantages for the construction of safe, energy-dense all-solid-state sodium batteries, but presently the chlorides with sufficiently high cost-competitiveness for commercialization almost all exhibit low Na-ion conductivities of around 10 −5 S cm −1 or lower. Here, we report a chloride solid electrolyte, Na 2.7 ZrCl 5.3 O 0.7 , which reaches a Na-ion conductivity of 2.29 × 10 −4 S cm −1 at 25 °C without involving overly expensive raw materials such as rare-earth chlorides or Na 2 S. In addition to the efficient ion transport, Na 2.7 ZrCl 5.3 O 0.7 also shows an excellent deformability surpassing that of the widely studied Na 3 PS 4 , Na 3 SbS 4 , and Na 2 ZrCl 6 solid electrolytes. The combination of these advantages allows the all-solid-state cell based on Na 2.7 ZrCl 5.3 O 0.7 and NaCrO 2 to realize stable room-temperature cycling at a much higher specific current than those based on other non-viscoelastic chloride solid electrolytes in literature (120 mA g −1 vs. 12–55 mA g −1 ); after 100 cycles at such a high rate, the Na 2.7 ZrCl 5.3 O 0.7 -based cell can still deliver a discharge capacity of 80 mAh g −1 at 25 °C.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 48
·27651-27659
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IF 12.732
Ming-Hui Cao,Ren-Yan Li,Shi-Ya Lin,Shao-Di Zheng,Lu Ma,Sha Tan,Enyuan Hu,Zulipiya Shadike,Xiao-Qing Yang,Zheng-Wen Fu
Owing to the abundance of raw material reserves and low cost, Na-ion batteries (NIBs) have successfully gained widespread attention from academic and industrial communities in the past few decades. However, the insufficient cathode energy density is still one of the critical bottlenecks restricting the development of NIBs. Following a strategy of introducing Li+ into the transition-metal (TM) layer to enhance the oxygen redox reaction, a novel layered cathode material P2-Na0.6Li0.11Fe0.27Mn0.62O2 (NLFMO) was designed and successfully synthesized. This NLFMO cathode not only delivers a large initial reversible capacity of 207.3 mA h g−1, but also shows a good cycling performance (104.2 mA h g−1 after 80 cycles) and rate capability (126.2 mA h g−1 at 1C). The ultrahigh capacity is contributed by both cationic (Fe3+/Fe4+ and Mn3+/Mn4+) and partially reversible anionic redox (O2−/On−) reactions, revealed by in situ X-ray absorption spectroscopy (XAS) and X-ray photoelectron spectroscopy (XPS) techniques. Moreover, no detrimental P2–O2 phase transition was observed in ex situ X-ray diffraction (XRD) patterns, confirming the high structural stability during Na+ deintercalation/intercalation processes. These results provide valuable information about the high-energy density layered cathode materials based on anionic redox reactions for NIBs.
研究领域:
材料科学
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电化学
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能源存储
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无机化学
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固体化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 58
·53319-53323
·
IF 3.289
Tiantian Gu,Min Zhou,Mengyun Liu,Kangli Wang,Shijie Cheng,Kai Jiang
A polyimide–MWCNT composite (PNP@CNT) synthesized from 1,4,5,8-naphthalenetetracarboxylic-dianhydride (NTCDA) and phenylene diamine (PDA) was investigated as a novel anode for aqueous Na-ion batteries. This composite demonstrates a high reversible capacity of 149 mA h g−1 at quite a low potential of −0.65 V (vs. SCE), superior rate capability and long-term cycling stability. The feasibility of PNP@CNTs in aqueous Na-ion full batteries is also confirmed in conjunction with the Na0.44MnO2 cathode, possibly serving as a high performance aqueous Na host anode for large-scale electric energy storage applications.
研究领域:
材料科学
·
电化学
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能源存储
·
纳米复合材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Haonan Cao,Meiqi Yu,Long Zhang,Zhaoxing Zhang,Xinlin Yan,Peng Li,Chuang Yu
Solution-synthesis method is attractive for solid electrolytes because it is a facile and scalable process to be used to permeate electrodes and to construct a thin electrolyte coating layer on active materials. In this work, we report Cl-doped Na 3 SbS 4 prepared via aqueous-solution approach. Besides decent ionic conductivity , the aqueous-solution approached electrolyte demonstrates an improved interfacial stability toward Na metal compared to the solid-state sintered one because of the residual hydrate, nanosized microstructure, and Cl incorporation. All-solid-state batteries using the solution-prepared electrolytes have enhanced cycling performance, though the performance still needs to be further improved.
研究领域:
材料科学
·
电化学
·
储能
·
固态电池
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Zhen Li,Jinglin Mu,Xiaozhong Wu,Jiwen Li,Hao Yin,Tong Zhou,Xiangyan Shen,Pengfei Zhou,Jin Zhou
Making CF x -based batteries rechargeable represents a superior promise route to dramatically boost of secondary battery systems due to the unprecedented theoretical capacity and specific energy density of CF x . However, this goal has been plagued by a fundamental challenge of the high dissociation energy and the non-uniform deposition of the discharge products, alkaline metal fluoride (e.g., NaF). Herein, a novel strategy of engineering the discharge product NaF is developed. The hybrid Cu@CF 0.88 cathode material delivers a reversible discharge capacity of 700.6 mAh g −1 at 20 mAh g −1 and an energy density of 1541.1 Wh kg −1 , corresponding to 81.4% of the theoretical value. At 200 mAh g −1 , it gives a reversible discharge capacity of 250.1 mAh g −1 after 10 cycles. The Cu nanoparticles serve as preferential nucleation sites, effectively regulating the nucleation, crystallization, and spatial distribution of NaF in the initial discharge process. More importantly, an in situ generated intermediate NaCuF 3 induces the reconstruction of NaF into a more readily decomposable and electrochemically active amorphous phase. This strategy remarkably improves the reaction reversibility of the Na/CFₓ batteries, while additional efforts are required to optimize the long-term cycling stability for practical applications.
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2020
·
IF 3.204
E. Loni,M.H. Siadati,A. Shokuhfar
In the current work, for the first time, hard-templating method was applied to synthesize mesoporous Na 2 CoP 2 O 7 powder for oxygen evolution reaction (OER) application. X-ray diffraction patterns (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Brunauer–Emmett–Teller (BET) analyses were carried out for investigating the structure, composition, and morphology of the electrocatalyst powder. The electrocatalytic performances of the mesoporous Na 2 CoP 2 O 7 (meso-Na 2 CoP 2 O 7 ) powder along with its composites with reduced graphene oxide (rGO) were studied by linear sweep voltammetry (LSV). The meso-Na 2 CoP 2 O 7 /rGO (50/50 wt%) composite required only 167 mV overpotential to produce a current density of 10 mA cm −2 .
研究领域:
材料科学
·
电化学
✓ 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 POWER SOURCES
·
2013
·
IF 4.675
Yingying Hu,Zhaoyin Wen,Xiangwei Wu,Yan Lu
Polarization problem caused by the incomplete wetting of sodium on β″-alumina has been considered as one of the most difficult issues in Na-beta batteries . Here, nickel nanowire network coatings have been designed and fabricated directly on the β″-alumina electrolyte surface to effectively alleviate this problem. The coating consists of interconnecting nickel nanowires with diameter of about ∼100 nm, forming a highly porous morphology. The structural parameters of the nickel network coatings can be tuned mainly by the amount of the poly(methyl-methacrylate) soft template in the precursors. The nickel nanowire network coatings are demonstrated to greatly improve the wettability of the β″-alumina ceramics by molten sodium. Moreover, the nickel coating displays low sheet resistance of ca. 1 Ω sq −1 . The results of Na/β″-alumina/Na symmetric cells at 350 °C reveal that the polarization and the interfacial resistance of the cell is alleviated intensively by the nickel coating, mainly due to the greatly improved wetting performance of the β″-alumina ceramics. This modification design and the soft-template-assisted synthetic method could be readily extended to any other substrate surfaces with arbitrary shape.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xiaohong Wang,Li Qi,Hongyu Wang
Anatase TiO2 used as the sodium-storage anode is coupled with a graphite cathode to construct dual-ion batteries. The batteries display wide voltage window (1.0–4.7 V), long cycling stability (98 mAh g–1 after 1400 cycles at 500 mA g–1), and considerable rate performance (102 mAh g–1 at 1500 mA g–1). Furthermore, the kinetic behaviors of Na+ and PF6– ions are investigated through electrochemical impedance spectroscopy, the galvanostatic intermittent titration technique, and the potentiostatic intermittent titration technique. The corresponding apparent ion diffusion coefficient is calculated, and the results indicate that the transport of PF6– anions in the graphite cathode is swift.
研究领域:
材料科学
·
电化学
✓ 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）