Materials Today
·
2024
·
IF 21.1
Xuanfeng Chen,Ziang Jiang,Qihou Li,Shunrui Luo,Yujie Wang,Fulu Chu,Chunhao Qin,Feixiang Wu
Lithium-metal fluoride batteries with higher energy density than commercial lithium-ion batteries are promising candidates for future energy storage. However, challenges such as poor electronic and Li + conductivity, active material dissolution, and volume expansion during cycling hinder their practical application. Here, a well-designed yolk-shell FeF 3 @C is aimed to address these issues. The outer carbon shell, derived from an organic carbon source, enhances the electronic conductivity of the embedded FeF 3 nanoparticles and protects them from unfavorable dissolution. The hollow design is utilized to provide sufficient space for FeF 3 nanoparticles to expand during cycling, preserving the carbon shell to not be destroyed. Post-mortem studies reveal the in-situ formation of Fe/O shell during cycling, which further prevents the loss and shuttle of Fe. Consequently, the FeF 3 @C nanocomposites deliver a capacity of 400 mAh g −1 at 1.0 C over 1500 cycles with a high capacity retention close to 95 %, and achieve super-rate capability up to 40 C. Moreover, the produced yolk-shell FeF 3 @C nanocomposites demonstrate air stability, which can simplify the manufacturing process of metal fluoride cathodes. Our study offers a promising direction for designing FeF 3 cathodes that achieve both outstanding electrochemical performance and air stability for practical Li-FeF 3 batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Siyue Zhang,Hui Cheng,Baoli Wang,Fan Shi,Lijun Yan,Lina Zeng,Lin Li,Shuhai He,Wei Sun
Petal-shaped FeS@MoS 2 -C nanocomposite was synthesized using carbon fiber as the basic carrier by hydrothermal method. The uniformly dispersed nanocomposite, hemoglobin (Hb) and Nafion mixture were drip-coated on the newly prepared carbon ionic liquid electrode (CILE) to build a modified electrode named as Nafion/Hb/FeS@MoS 2 -C/CILE. The morphology and valence state of FeS@MoS 2 -C nanocomposite was investigated by SEM, TEM, XPS etc. and the biological structure of Hb was not changed based on UV-VIS and FT-IR spectroscopic analysis. Electrochemistry of Nafion/Hb/FeS@MoS 2 -C/CILE was recorded by cyclic voltammetry with voltammetric behaviors investigated. Also, the modified electrode has excellent catalytic performance for nitrite, hydrogen peroxide, bromate with the detection range as 0.10~5.00 mmol L -1 , 0.10~14.00 mmol L -1 , 0.05~25.00 mmol L -1 , respectively. The pickle juice sample was analyzed by this method satisfactory, further proving the practical application.
研究领域:
生物化学
·
分析化学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 33
·335701
·
IF 3.399
Fei Wang,Chuqing Wang,Hong Chen,Wenlong Zhang,Rujia Jiang,Zhanheng Yan,Zhongyuan Huang,Haihui Zhou,Yafei Kuang
The iron oxide-based anode materials are widely studied and reported due to their abundance, low cost, high energy density and environmental friendliness for lithium ion batteries (LIBs). However, the application of LIBs is always limited by the poor rate capability and stability. In order to tackle these issues, a novel material with carbon-encapsulated Fe3O4 nanorods stuck together by multilevel porous carbon (Fe3O4@C/PC) is prepared through directly carbonizing the Fe-based metal-organic framework under a nitrogen atmosphere. This novel material shows a high specific capacity and rate performance. The initial specific capacity can reach 1789 mAh g−1 at a current density of 0.1 A g−1, and the specific capacity still remains 1105.3 mAh g−1 and 783.5 mAh g−1 after 150 cycles at the current densities of 0.1 A g−1 and 1 A g−1, respectively. Even under a current density as high as 12 A g−1, the specific capacity can achieve 309 mAh g−1 after 2000 cycles with an average attenuation rate of 0.019% per cycle. Overall, the simple strategy, low cost and high capacity can make the practical application possible.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Lei Cao,Maliang Zhang,Kunmei Su,Feng Gu,Zhenhuan Li
Decorating porous carbon nanomaterials with rich homodispersed metal cluster and heteroatoms can effectively shorten the diffusion pathway of oxygen and expose more active sites, thereby promoting oxygen reduction reaction (ORR). Herein, hierarchical porous carbon nanorods with homodispersed Fe–N x –C active sites are obtained by calcination , etching and ammonia activation of Fe-nitrogenous acid (NTA) coordination polymer nanowires. The obtained Fe-PCNRs-700 as ORR catalysts show the excellent activity with half wave potential (E 1/2 ) of 0.71 V vs. reversible hydrogen electrode (RHE) in 0.5 M H 2 SO 4 and 0.87 V vs. RHE in 0.1 M KOH electrolyte, which owe to its huge specific surface area (1652 m 2 g −1 ), hierarchical pore structure , homodispersed Fe–N x –C active sites and structural defects. Furthermore, using Fe-PCNRs-700 as a cathode catalyst in both liquid and flexible solid Zn-air batteries, and the assembled liquid batteries display the high power density of 161 mW cm −2 and robust charge/discharge stability of 116 h.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 50
·505402
·
IF 3.953
Wenjing Yu,Shaohua Zhang,Kun Gao,Xiangyun Lin,Yuyang Han,Zhipan Zhang
Co3O4-MoSe2@C nanocomposite has been prepared by a convenient method via combining hydrothermally synthesized MoSe2@C and Co3O4. When catalyzing the hydrogen evolution reaction and oxygen evolution reaction, the catalyst features low overpotentials of 144 mV and 360 mV (both at 10 mA cm−2 current density), respectively. It can also serve as the cathode in the lithium-oxygen battery and the device shows a low charging-discharging overpotential of 1.50 V with a stable performance of over 200 cycles at current density of 1000 mA g−1, shedding light on the design and synthesis of novel multifunctional electrocatalysts for energy conversions.
研究领域:
材料科学
·
能源转换与存储
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2021
·
IF 6.583
XianYan Jiang,ShuPing Deng,JunJie Liu,Ning Qi,ZhiQuan Chen
In this work, metal oxide/metal@carbon (NiO/Ni@C) composites as electrode materials have been successfully prepared using the pillared Ni 2 (bdc) 2 (dabco) (bdc = 1,4-benzenedicarboxylic acid, dabco = 1,4-diazabicyclo[2.2.2]-octane) as the precursor. Owing to the multiple active sites (NiO, Ni and Carbon), rich oxygen defects, and abundant Ni 3 + , the NiO/Ni@C composites show excellent electrochemical performance. A maximum specific capacitance of 805.3 F g −1 at 0.5 A g −1 and 576.2 F g −1 at 10 A g −1 is obtained for the NiO/Ni@C electrode material calcined at 500 °C, indicating a high rate capability. Meanwhile, the assembled asymmetric supercapacitor (ASC) NiO/Ni@C//PEDOT-AC (poly(3,4-ethylenedioxy-thiophene)-activated carbon) has a wide working voltage of 0–1.7 V, high specific energy of 20.7 W h kg −1 , superior specific power of 12920 W kg −1 , and excellent cycle stability with capacitance retention of 69.7% after 10 000 cycles. Furthermore, a red light-emitting diode (LED) is lighted up by two NiO/Ni@C//PEDOT-AC ASCs in series connection.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 150
·期 3
·815-825
·
IF 2.372
Huang Yan-Feng,Zhang Lu,Ma Li,Li Ying,Zhong Chongli
Abstract Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites were achieved using nanoparticle-encapsulated MOFs Fe 3 O 4 @HKUST-1 as both a precursor and a self-sacrificing template. Fe 3 O 4 @HKUST-1 was thermally converted into magnetic Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites in different atmosphere (N 2 and air). The resulting composites not only kept superparamagnetic characteristics, but also exhibited improved peroxidase-like catalytic activity and high stability when compared to the precursor Fe 3 O 4 @HKUST-1. The morphology, crystal structure, magnetic and porous properties of Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites were characterized, and the kinetics parameters and the influence factors on the peroxidase-mimicking activity such as temperature, pH and H 2 O 2 concentration were evaluated. On account of the excellent peroxidase-like activity, the as-prepared Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites were successfully used for the catalytic removal of methylene blue (MB) dye with H 2 O 2 oxidant. This work provides an effective way to fabricate highly reactive MOFs-derived biomimetic catalysts, which have potential applications in bioassays and pollutant degradation. Graphic Abstract Fe 3 O 4 @Cu/C and Fe 3 O 4 @CuO composites were achieved using Fe 3 O 4 nanoparticle-encapsulated HKUST-1 as self-sacrificial templates and demonstrated excellent peroxidase-like activity.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 14
·19901-19911
·
IF 2.478
Wang Fei,Liu Xiaoyu,Liu Zhuang,Wang Yanming
The large-scale application of Li-ion batteries requires high-performance cathode materials. Herein, a high-activity Li 3 V 2 (PO 4 ) 3 /C composite cathode has been fabricated through a solid-state reaction employing dual carbon sources of poly(acrylic acid) and soluble starch. The effects of single carbon source and dual carbon sources on the physical and electrochemical properties of Li 3 V 2 (PO 4 ) 3 /C are analyzed. The porous structure induced by poly(acrylic acid) and highly conductive carbon resulted from soluble starch enable the composite to achieve large discharge capacities and stable cyclability at high C-rates. At 3.0–4.3 V and 10 C, a large discharge capacity of 121 mAh g −1 (nearly 91% of the theoretical capacity) can be obtained, along with high capacity retention of 88% over 1000 cycles. Furthermore, at 3.0–4.8 V, the composite also possesses larger high-rate capacities and better cyclability than other composites prepared using single carbon source. The dual carbon sources bring a synergistic effect to the enhancement of electrochemical performances of the Li 3 V 2 (PO 4 ) 3 /C composite.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Environmental Science-Nano
·
2020
·Vol. 7
·期 12
·3814-3823
·
IF 7.683
Hanfeng Zhou,Zhibo Deng,Tianbao Liu,Tao Liu,Lijuan Zhang,Xintai Su,Zhang Lin
The science linking thermochemical conversion of large-scale industry oily sludge with applied materials has been improved in the last ten years. However, with the traditional converting methods it is hard to precisely control the composition and structure of oily sludge-based products during pyrolysis due to the complexity of the composition of the oily sludge. Here, a chlorinating calcination method using sodium chloride (NaCl) as a chlorinating salt and template was first developed to prepare porous Fe–N–C materials (FCN-500) through pyrolysis of oily sludge containing iron-bearing minerals and pyridine. The formation mechanism of FCN-500 was proposed, where iron ions (Fe3+) from the inorganic component (anorthite) in the sludge were rapidly dissociated with the assistance of NaCl, followed by coordination with the organic component (pyridine nitrogen) in the oily sludge to form the pyridine nitrogen–iron ((C5H6N)n–Fe) complex, and then carbonization. As-obtained FCN-500 exhibited higher specific capacitance (286.3 F g−1 at a current density of 0.5 A g−1), enhanced energy density (33.5 W h kg−1 at a power density of 606.1 W kg−1) and more excellent stability and durability (more than 80.1% capacitance retention after 10 000 cycles) compared with two other electrodes. The reasonably better performance of the obtained FCN-500 in supercapacitors (SCs) is attributed to its large surface area, hierarchically porous channels, high conductivity, and unique Fe–N–C structure. Therefore, this work not only provides a feasible way to solve the bottleneck problem in sludge pyrolysis, but also provides a method to design large scale porous Fe–N–C materials for practical applications.
研究领域:
环境科学
·
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Advanced Fiber Materials
·
2025
·
IF 21.3
Pei Yanchun,Wu Xueyan,Ren Zhichao,Lv Yan,Xue Rui,Guo Jixi,Jia Dianzeng
Electrospun fiber membranes enable oil–water emulsion separation via tunable morphology and chemistry, yet most face an efficiency–permeability trade-off where enhancing one compromises the other. Herein, optimized membranes (C-NFO@GDY) are synthesized with a uniform honeycomb nanostructure of graphdiyne (GDY) on flexible coal-based preoxidized fibers (C-NFO) through the Glaser‒Hay coupling reaction. The honeycomb nanostructure of GDY effectively disperses external stress on the C-NFO fibers, increasing the tensile strength from 2.8 to 3.2 MPa. In addition, the nanostructure enhances hydration layer formation kinetics, achieving superhydrophilicity (0°) and underwater superoleophobicity (> 150°) of the membrane. When tested against three surfactant-stabilized emulsions (cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS), and polyoxyethylene sorbitan monooleate (Tween 80)), the membranes demonstrated separation fluxes of 2936 L/(m 2 h), 2149 L/(m 2 h), and 1855 L/(m 2 h), and the corresponding separation efficiencies were 99.6%, 96.6%, and 93.1%. For CTAB-stabilized emulsions, the C-NFO@GDY membrane (zeta potential: − 65.2 mV) exhibits strong electrostatic attraction with cationic surfactants, achieving a high flux of 2936 L/(m 2 h) and a separation efficiency of 99.6%, surpassing those of recently reported MXene and PANI composites under identical conditions. Overall, the synergy between honeycomb nanostructure and electronegativity of GDY overcomes the flux–efficiency trade-off, offering new ideas for the preparation of oil–water separation membranes. Graphical
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Yongchao Fang,Xiufang Cui,Guo Jin,Erbao Liu,Dan Zhang,Xin Wen,Qingbo Mi
In this work, hot corrosion behavior of air plasma sprayed La 0.8 Ba 0.2 TiO 3-δ (LBT)-YSZ double-ceramic-layer thermal barrier coating exposed to Na 2 SO 4 + V 2 O 5 molten salt at 900 °C for 20 h was investigated. The phase characterization and microstructural evolution analysis of the coating was carried out after the hot corrosion test by using X-ray diffraction (XRD), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that the LBT-YSZ coating possessed excellent hot corrosion resistance compared with the conventional pure YSZ coating. The conventional pure YSZ coating was completely destroyed after the 10 h test due to the volume change resulting from the adverse phase transition. However, the situation for the LBT-YSZ coatings is completely opposite. The LBT-YSZ coating could prevent the YSZ interlayer underlying the LBT overlayer from densification for at least 20 h. In the LBT overlayer, the double-reaction-layer composed of under dense layer and upper porous layer was formed. In particular, the continuous dense layers with a thickness of ~100 μm formed after 10 h, effectively arresting further penetration of the molten salt. In addition, affected by the diffusion extent of SO 3 gas, the corrosion products of porous layer were composed of Ba 2 V 2 O 7 , LaVO 4 , TiO 2 and BaSO 4 , while those of dense layer consisted of Ba 2 V 2 O 7 , LaVO 4 and TiO 2 . The specific mechanism by which the corrosion reaction occurred was proposed based on Lewis acid-base rule and thermodynamics.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Mingqian Wang,Ying Liang,Zhicheng Zhang,Guohong Ren,Yajun Liu,Shishan Wu,Jian Shen
Novel multifunctional core-shell nanoparticles (NPs) have attracted widespread attention due to their easy-to-modify surface properties and abundant functional groups. This study introduces a facile approach to synthesize Ag@ iron oxide (Fe 3 O 4 ) @C NPs, and modify with amino-poly (ethylene glycol) (PEG)-carboxyl and folate (FA) on the exposed carbon surface to produce high contrast for excellent stability, good biocompatibility, cancer cell targeting, and synergistic treatment. The multi-armed PEG at the edge of Ag@Fe 3 O 4 @C NPs provides the materials an excellent capacity for doxorubicin (DOX) loading. The carbon layer could be used as a photothermal reagent due to its excellent near-infrared (NIR) absorbance capacity, and Fe 3 O 4 was used as a reagent for magnetic resonance (MR) imaging. In vivo combination therapy with this agent was administered in a mouse tumor model, and a remarkable synergistic antitumor effect that is superior to that obtained by monotherapy was achieved. Concerning these features together, these unique multifunctional Ag@Fe 3 O 4 @C-PEG-FA/DOX NPs could be regarded as an attractive nanoplatforms for chemo-photothermal synergistic tumor therapy with dual-modal fluorescence and MR imaging-guided targeting.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）