JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Dongyu Pei,Hanbo Wang,Sheng Wan,Ziming Wang,Mingrui Yu,Zhenlu Wang,Haiyan Lu
Despite its high theoretical specific capacitance and low cost, copper oxide still suffers from insufficient utilization of active sites and poor cyclic stability when applied in asymmetric capacitors. In this work, micron-sized CuO electrode has been successfully obtained using nickel foam as substrate through an electrodeposition method. By optimizing the electrodeposition potential and designing structure, the CuO microsphere electrode delivers a high specific capacitance of 985 F g −1 at 1 A g −1 . Furthermore, the asymmetric capacitor assembled with CuO electrode and activated carbon electrode exhibits a maximum energy density of 44.5 Wh kg −1 at 1600 W kg −1 and a long lifespan of 93.4% capacitance retention after 10000 cycles at 5 A g −1 . These results demonstrate that the microsphere structure contributes to maintaining excellent structural stability during long cycles and then facilitate their electrochemical kinetics and capacitive performances. This work presents a novel strategy for designing and enhancing micron-sized positive electrodes for high-performance asymmetric capacitors.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiangxian Li,Hengfeng Zhu,Xuanru Wei,Quanling Yang,Chuanxi Xiong,Zhuqun Shi
Activated carbon is extensively utilized in blood purification applications. However, its performance has been significantly limited by their poor blood compatibility. In this work, 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOCN) and activated carbon (AC) were used to form composite beads by the drop curing method to improve hemocompatibility. The TOCN/AC composite beads had porous surface and exhibited extraordinary adsorption properties. The beads had a high adsorption capacity for creatinine with the optimal adsorption capacity of 83.33 mg g −1 . And the equilibrium adsorption of bilirubin, uric acid and Cu 2+ by TOCN/AC beads was as high as 159.80 mg g −1 , 114.61 mg g −1 and 154.0 mg g −1 , respectively, with a mass ratio of TOCN to AC of 1:4. It is also observed that the adsorption behavior of TOCN/AC beads on creatinine was consistent with the second-order kinetics and Langmuir isothermal model. The hemolysis rate of TOCN/AC was 1.21 %, indicating that TOCN/AC beads had good blood compatibility. The clearance of creatinine toxin in blood by TOCN/AC beads was as high as 87 % within 90 min. Overall, our produced composite beads had great potential for application in the field of blood purification.
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PubMed
高影响因子
Journal of Energy Storage
·
2024
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IF 8.9
Wang Hanbo,Pei Dongyu,Wan Sheng,Wang Ziming,Fan Zhitian,Tian Yumei,Li Kechang,Lu Haiyan
We initially proposed a facile one-step electrodeposition method utilizing Cyclic Voltammetry (CV) for the growth of NiO nanospheres (NiO-NSs) on three-dimensional nickel foam (NF) substrates. Notably, no binders, templates, or surfactants were introduced throughout the entire experimental process, ensuring the cleanliness and environmental friendliness of the synthesis process. The reaction parameters were successfully fine-tuned to achieve efficient in-situ growth, porous structure, and uniform morphology. The resulting optimized electrodes underwent characterization using diverse microscopic techniques. Subsequently, the electrochemical performance was analyzed in both half and full cell configurations. The obtained porous electrode materials in-situ grown on NFs exhibited a distinct nanosphere morphology with an average diameter of approximately 200 nm. The NiO-NSs exhibited satisfactory electrochemical performance in three-electrode system, demonstrated an enhanced specific capacitance of 438.2C g −1 (876.4 F g −1 ) at 1 A g −1 , highlighting their exceptional electrochemical performance. Furthermore, the assembled supercapacitor with NiO-NSs and activated carbon yielded a significantly high energy density of 37.71 Wh kg −1 and a power density of 246.38 W kg −1 at 1 A g −1 . More significantly, the outstanding capacity retention was 81.27 % after 45,000 continuous GCD cycles. This study offered novel insight into a facile synthesis method, utilizing CV electrodeposition for designing high-performance metal oxide or hydroxide materials, ultimately boosting electrochemical performance.
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TALANTA
·
2024
·
IF 5.6
Xiaohu Chen,Qingshan Dai,Xia Qiu,Xianzhun Luo,Yongxin Li
Hydrogen peroxide (H 2 O 2 ) is a common oxidant that plays an important role in many biological processes and is also an important medium analysis in various fields. In this work, a new electrochemical nanosensor capable of detecting and quantifying hydrogen peroxide was introduced. This nanosensor was fabricated by electrodepositing prussian blue (PB)/graphene quantum dots (GQDs)/polypyrrole (PPy) on single nanopore electrode etched from single gold nanoelectrode. This prepapred nanosensor exhibits good electrochemical response to hydrogen peroxide with high sensitivity and stability, with a linear response in the 2.0 and 80 μM by using amperometric method and differential pulse voltammetry (DPV) method. The limit of detections are 0.33 μM (S/N = 3) for amperometric method and 0.67 μM (S/N = 3) for differential pulse voltammetry (DPV) method, respectively. This nanosensor can be used for the determination of hydrogen peroxide in human urine, and can serve as a new electrochemical platform to monitor H 2 O 2 release from single living cells due to its small overal dimension and high sensitivity.
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高影响因子
Materials Chemistry Frontiers
·
2024
·Vol. 9
·期 1
·109-121
·
IF 6
Xiaojuan Shen,Shouyan Sun,Pengwei Liu,ManLin Wei
3D foam-like composites with a large specific surface area and a well-distributed interconnected pore structure have been recognized as promising materials for energy storage devices. In this study, a novel composite electrode (PEUS-Mn-PS) consisting of a 3D foam-like PEUS matrix embedded with manganese dioxide (MnOx) was prepared using a simple and facile method. The PEUS matrix was fabricated by incorporating poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and water polyurethane (PU), where a sacrificial template of poly(3,4-ethylenedioxythiophene) (PEDOT)-decorated Ni foam (NF) was utilized. Specifically, surface modification of NF with a thin layer of PEDOT resulted in the formation of a more regular 3D interconnected scaffold of PEU with more hydrophilic surface, facilitating homogeneous formation of the electrode materials and electrolyte infiltration. Benefiting from the high conductivity of PEDOT:PSS, large surface area provided by PEU, and high capacity offered by MnOx, the resulting flexible PEUS-Mn-PS electrode exhibited an exceptional areal specific capacitance of 681.7 mF cm−2 (∼486.9 F g−1) at 1 mF cm−2, much larger than 358.9 mF cm−2 of the PUS-Mn-PS electrode prepared without PEDOT modification and 318.7 mF cm−2 of the NF-Mn electrode synthesized through direct electrodeposition of MnOx on NF. The resulting PEUS-Mn-PS electrode allowed the assembled solid-state symmetric flexible SC to achieve an impressive energy density of 0.043 mW h cm−2 at a power density of 2.24 mW cm−2, while maintaining excellent electrochemical performance even under various bending angles. This work provides a new approach to designing high-performance flexible SC electrode materials using a simple, cost-effective, and environmentally friendly method.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ishioma Laurene Egun,Bamidele Akinwolemiwa,Haiyong He,Mingchan Ma,Zhengfei Chen,George Z. Chen,Di Hu
Non-lignin-rich biomass has abundant reserves but remains underutilised as a sustainable carbon source for producing functional carbon materials in energy storage applications. The primary challenge is to develop an efficient and sustainable process to convert these resources into high-performance carbon as electrode active material for supercapacitors. To address this issue, a facile, low-cost molten base carbonisation and activation (MBCA) process is investigated to convert wet Radish (a non-lignin–rich biomass) into hierarchical porous carbon via a single thermal stage. This approach integrates carbonisation, in-situ activation, and heteroatom retention, yielding carbon with a specific surface area of 1172 m 2 g −1 , ultramicropores (0–0.7 nm), partial graphitic structure and nitrogen/oxygen-rich functional groups. The optimised carbon, obtained at 700 ˚C, as a supercapacitor electrode active material exhibited electrochemical performance, with a specific capacitance of 257F g −1 at 5 mV s −1 and 96F g −1 at 2 A g −1 , alongside remarkable cycle stability (92.6 % capacitance retention over 20,000 cycles) and low self voltage decay over 50 h. These results highlight the MBCA process as a viable solution for converting non-lignin-rich biomass into high-performance carbon materials, offering a practical and sustainable alternative for energy storage applications while mitigating environmental pollution from biomass decomposition.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xiaotong Mu,Lihua Chen,Nannan Qu,Min Yin,Shang Wu,Qimeige Hasi,Chaohu Xiao
Solar-powered interface evaporation is considered a promising technology to obtain freshwater from non-potable water by using sustainable solar energy. However, research on combining the photocatalytic effect with solar interfacial evaporation technology to go for photothermal conversion materials with full solar spectrum utilization for photothermal and photodegradation capabilities is still scarce. Due to the unique optical properties of MXene, a novel MXene/Ag 3 PO 4 -based membrane with synergistic photothermal and photocatalytic effects was developed from the perspective of practical applications such as water purification, photodegradation of organic dyes and antibacterial properties. In this paper, polyvinylidene fluoride (PVDF) and carbon black (CB) were used as the substrate, calcium carbonate (CaCO 3 ) and hydrochloric acid (HCl) were selected as the pore-forming agent for hydrophilic modification, and MXene/Ag 3 PO 4 serves as the photocatalyst. The prepared composite polyvinylidene fluoride membrane (PCC-MXene/Ag 3 PO 4 ) with Schottky junction, possesses a rich pore structure, abundant water molecule transport channels, high light absorption ability, and low thermal conductivity, which lead to a good performance in solar interface evaporation, photodegradation and antibacterial. The superhydrophobicity and floatability of the nanosponges in water enable them to continuously pump water, which greatly promotes the dissolution of salt accumulation. With the help of porous nanosponges, PCC-MXene/Ag 3 PO 4 exhibits excellent evaporation stability and salt resistance under 1 kW m −2 solar irradiation, as well as photodegradation of organic dyes. In addition, the PCC-MXene/Ag 3 PO 4 membrane has the properties of self-buoyancy, electrical conductivity, and superior flexibility. Therefore, considering the simple preparation method and fine performances, the PCC-MXene/Ag 3 PO 4 mixed membrane has great application potential in the study of interface evaporation, photodegradation of organic dyes, and antibacterial properties.
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JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 16
·6849-6860
·
IF 3.5
Li Xue,Liu Chenxi,Xu Anding,Wu Songping,Wang Liming
Silicon serves as a widely employed anode material in lithium-ion batteries (LIBs). However, its practical application faces significant challenges due to substantial volume expansion during lithiation and inadequate electrical conductivity, limiting its use in high-energy–density LIBs. In addressing these challenges, this study places a strong emphasis on developing a mass-producible method for fabricating high-strength nano-porous Si@C composites. This material shows great promise as an anode material for lithium-ion batteries, offering multi-stage stability. The research focuses on modifying commercial silicon powders, followed by a straightforward and large-scale multi-stage stabilization synthesis process, ultimately leading to the successful synthesis of robust nano-porous Si@C composites. Notably, these nano-porous Si@C composites demonstrate outstanding electrochemical performance, with a high discharging capacity of 3001.5 mAh g –1 at 0.2 A g –1 and 1407.9 mAh g –1 after 1000 cycles at 2 A g –1 . They exhibit an impressive rate capability of 856.4 mAh g –1 at 10 A g –1 , exhibiting an initial Coulombic efficiency of 82.5%. Overall, this systematic approach offers a promising advancement in developing high-performance Si-based anode materials for next-generation LIBs, with improved energy density and cycling stability.
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ACS Applied Energy Materials
·
2024
·
IF 5.4
Qirun Wang,Wenjue Li,Zhenyu Zhang,Xiaowei Xu,Jichao Shi,Lin Lin,Dandan Wu,Sheng Han,Runping Jia,Shufang Chang
The design of multiphase heterostructures presents a promising strategy for oxygen evolution reaction (OER) and serves as an effective approach to constructing efficient alkaline OER catalysts. In this paper, the OER catalyst with a NiFe-NS/NiMoO4 layered heterostructure was synthesized by reflux condensation and hydrothermal methods. The unique rock-like nanospheres can increase the specific surface area and provide more active sites. The formation of heterojunctions through the modification of NiFe nanospheres on NiMoO4 nanorods can induce changes in their electronic structure. Due to its inherent properties, NiFe-NS/NiMoO4 demonstrates higher performance than commercial RuO2 (which has an overpotential of 228 mV at a current density of 10 mA cm–2), with overpotentials of 196 and 294 mV at current densities of 10 and 100 mA cm–2, respectively. The stability of the sample was proved to be excellent during a 50 h stability test. Density functional theory (DFT) calculations also indicate that the improved efficiency of the OER can be attributed to controlling and adjusting of the electron structure through heterojunction formation as well as the collaborative impact resulting from NiFe and NiMoO4. The structure enables optimized adsorption of intermediates and facilitates the kinetics of OER, and provides an idea for the design of heterogeneous catalysts.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Shuang Gao,Xiuyan Deng,Xiaoming Qi,Hongbo Dai,Shao-Yun Fu,Yaqin Fu
High-performance microwave absorption materials with broad electromagnetic absorption bandwidths and scalable architectures have been increasingly demanded in modern electric and telecommunications industries. Herein, we propose a flexible three-dimensional (3D) woven fabric with superior washability and electromagnetic-wave absorption capability using the nanoengineered carbon black (CB)-Fe3O4/polyamide-66 (PA-66) composite fibers that possess a unique core–sheath structure. Notably, the impedance matching and microwave attenuation of the proposed 3D fabric absorbers are realized by the dielectric–magnetic coupling effect of nanometer-sized CB and Fe3O4 nanoparticles within the constituent PA-66 fibers. The produced 3D fabrics showed superior mechanical properties with a tensile strength of 35 MPa, good softness with flexibility of drape coefficient up to 88.8%, and great air permeability with an air permeability of over 109 mm/s. At a weft density of 250 picks/10 cm, the fabric realized the best electromagnetic-wave absorption performance with a minimum reflection loss of −34.5 dB, owing to the good impedance-matched 3D orthogonal structures and integrated dielectric–magnetic fibrous networks of the 3D fabric. In particular, this performance could be well-maintained even after rinsing five times or folding to two layers. This study can provide a promising route to developing next-generation flexible electromagnetic absorption materials.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Ishioma Laurene Egun,Yang Hou,Zhengfei Chen
Zinc Supercapatteries (ZnSCs) are promising, low-cost and environmentally friendly electrochemical energy storage devices, with biomass-derived carbon showing promising results as its positrode active material. However, achieving sustainable biomass-derived carbon via a simple, single-stage and low-temperature process with properties for optimum electrochemical performance is still a challenge. In this study, we show that ultramicroporous and self-doped carbon which are critical electrode properties can be obtained from wet waste coffee grounds via a single-stage thermal process termed molten base carbonization and activation. The process integrates carbonization, in-situ activation and self-doping in one thermal step, driven by the catalytic reactivity of intercalated potassium ion within various components. Temperature control during the process resulted to changes in the microstructure, hierarchical porosity, oxygen and nitrogen functionalities affecting electrochemical performance. The carbon obtained at 700 °C (CGZ-700) as positive electrode active material in Zinc supercapattery achieved specific capacity of 361 mAh g −1 , specific capacitance of 204F g −1 at 0.1 A g −1 , alongside a specific energy and power of 91.99 Wh kg −1 and 89.99 W kg −1 . At 1.0 A g −1 , it achieved a coulombic efficiency of 99.8 % and 78 % capacity retention after 10,000 cycles. This study offers a facile, low temperature single-stage thermal conversion process for low-cost waste biomass, advancing the application of waste-derived carbon in ZnSCs and sustainable energy storage devices.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Bolin Yang,Changliu Kuang,Zhenglong Liu,Chao Yu,Chengji Deng,Jun Ding,Zhoufu Wang,Shixian Zhao
In order to effectively improve the density and oxidation resistance of ZrB 2 -SiC coating materials, HfB 2 was added into ZrB 2 -SiC system and their physical properties, oxidation resistance were explored. It was observed that the flexural strength of the spark plasma sintered sample with 8 vol% HfB 2 was 717.1 MPa, which was 162.6 % higher than that of the sample without HfB 2 (273.1 MPa). At the same time, the oxidation activation energy of the sample with 15 vol% HfB 2 was increased to 511.98 kJ/mol, showing excellent oxidation resistance. The oxidation process is that HfB 2 and ZrB 2 were oxidized prior to SiC to form HfO 2 and ZrO 2 to form a dense oxide layer on the outermost layer of the sample, and SiC reacted to form a second dense SiO 2 layer to hinder oxygen intrusion. In summary, diboride can achieve the synergistic effect of improving the oxidation resistance and structural optimization of ZrB 2 -SiC-HfB 2 coatings composites, which provides a theoretical basis for its practical application.
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高影响因子
危险品化学品经营许可证（带存储）