Small
·
2025
·
IF 12.1
Zhengyang Li,Yuting Chen,Zhiyuan Guo,Tong Wang,Qi Fan,Yuhang Zhuang,Chenying Li,Mei Yang,Teng Xu,Yanchen Liu,Zhiyuan Li,Qin Sun,Xiaohui Zhu,Hui Xia
Manganese-based oxide cathodes for sodium-ion batteries face irreversible degradation from Mn 3+ Jahn–Teller distortion and Mn 2+ dissolution, compounded by cyclic strain during (de)sodiation. To address this, a P2-K 0.7 Mn 0.8 Ni 0.1 Ti 0.1 O 2 (KMNT) cathode via dual-regulation is developed: K + pillars expand alkali - metal layers enabling fast Na⁺ diffusion, while Ni/Ti co-doping compresses transition-metal layers to suppress Mn migration and Jahn–Teller effect. Besides, the K + pillars in discharged KMNT enhance Mn─O interactions via electrostatic effects, elevating Mn redox potentials and enabling a high average discharge voltage of ≈2.6 V (vs. Na + /Na). Even at a low potential cut-off of 1.5 V, the KMNT cathode demonstrates a reversible specific capacity of 124 mAh g −1 at 1 C with 98% capacity retention after 200 cycles and retains 83% after 900 cycles at a large current density of 10 C, significantly outperforming conventional Mn-based cathodes. Electrochemical and operando tests confirm the dynamic K + /Na + exchange mechanism and absence of Mn 2+ formation, establishing a new paradigm for stable Mn-rich cathodes.
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高影响因子
Advanced Materials Technologies
·
2025
·Vol. 10
·期 13
·2401998
·
IF 6.2
Yongkuan Wu,Haolong Li,Jinsong Leng,Zhichun Zhang,Yanju Liu
This study successfully fabricates an ultra-lightweight buckypaper(BP)-Ni-Cu layered structure film using vacuum filtration and chemical-electroplating methods, achieving a thickness of 34 µm and a surface density of 50 g m − 2 . The film exhibits a notably low surface square resistance of 9.5 mΩ □ −1 . Regarding electromagnetic shielding performance, it exhibits exceptional effectiveness across multiple frequency bands: 96.67 dB in the Partial S-band (2.6–4 GHz), 65.05 dB in the C1 band (4–6 GHz), 64.23 dB in the C2 band (6–8 GHz), 87.04 dB in the X band (8–12 GHz), and 90.46 dB in the Ku band (12–18 GHz). In terms of mechanical properties, compared with the tensile fracture strength of 33.67 MPa of the BP film, the tensile fracture strength of the BP-Ni film is enhanced to 51.9 MPa, and that of the BP-Ni-Cu film is elevated to 49.43 MPa. Additionally, the film demonstrates good thermal stability at temperatures up to 300 ° C. It also exhibits favorable electrical conductivity. Overall, considering its excellent characteristics, including multi-band shielding and ultra-lightweight properties, this film presents a novel and highly promising solution for aerospace electromagnetic shielding applications.
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高影响因子
NANO
·
2025
·
IF 1.1
Dehui Li,Yiming Guo,Yanping Miao,Binbin Zhang,Haowen Zhu,Qiao Gao
Quinary wurtzite copper-based chalcogenide, Cu 3 MInSnS 6 (M= Cd, Co, Ni), nanocrystals (NCs) have been synthesized using a hot-injection method. The NCs were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and absorption spectroscopy. The NCs exhibit strong absorption across the visible spectrum with bandgaps ranging from 1.44 to 1.54 eV, ideal for thin-film solar cell applications. Photoresponse measurements demonstrate that the current under illumination is enhanced compared to the dark current in all thin-film samples fabricated from these NCs. Among the tested samples, the Cu 3 CdInSnS 6 -based film displayed the highest Ilight/Idark ratio. A prototype solar cell fabricated with Cu 3 CdInSnS 6 NCs achieved a power conversion efficiency of 0.73%. This work broadens the exploration of quinary copper-based chalcogenides for photovoltaic applications and offers insights that assist in the development of new solar cell absorbers.
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 11
·3526-3536
·
IF 4
Junxiang Zhou,Yudeng Wang,Bo Feng,Yong Sun,Jiafu Wang
Ternary transition metal oxides (TMOs) are potentially promising anode materials for lithium storage with high power and energy density. Designing appropriate electrode structures is an effective strategy to sufficiently exhibit the advantages of TMOs for lithium storage. Here, we present the synthetic process and electrochemical properties of carbon-coated mesoporous Ni–Mn–Co–O (NMCO) nanowire arrays (NWAs) grown on Ni foam as an integrated electrode for lithium-ion batteries (LIBs). The electrochemical measurements show that the carbon-coated NMCO integrated electrode exhibits high capacity and cycling properties. In addition, we have also developed an all one-dimensional (1D) structural full cell using an LiMn2O4 nanorod cathode and an NMCO/Ni NWAs@C-550 anode, which exhibits relatively outstanding cycling properties.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Hongming Zhang,Guangcheng Zhang,Qiang Gao,Meng Tang,Zhonglei Ma,Jianbin Qin,Mingyue Wang,Jang-Kyo Kim
Lightweight and multifunctional polyvinylidene fluoride/Nickel-chains (PVDF/Ni-chains) composite foams with good mechanical property, excellent thermal insulation and outstanding electromagnetic interference (EMI) shielding performance (SE) were prepared by a multi-step process including: (a) controllable synthesis of high-aspect-ratio Ni-chains, (b) Ni-chains introduced into PVDF matrix, (c) crystallinity tailoring of composite samples, (d) supercritical carbon dioxide foaming of the treated composites. Thermal treating and nanofiller existence effect are applied to tune the degree of crystallinity and crystal structures of semi-crystalline PVDF. Notably, with the optimized pre-treatment and foaming process, lightweight PVDF/Ni-chains composite foams with uniform closed-cell microcellular morphology were successfully developed. Thanks to the unique porous morphology, PVDF/10 wt% Ni-chains foams present decreased mass density (~1.0 g/cm 3 ), high tensile strength (~42.0 MPa), enhanced electrical conductivity (~0.01 S/m) and superior thermal insulation performance (~0.075 W/(m·K)). Furthermore, conductive-magnetic PVDF/10 wt% Ni-chains foam exhibits a high EMI shielding effectiveness of 26.8 dB and an outstanding specific shielding effectiveness (SSE) of 127.62 dB cm 2 /g, with an absorption-dominated shielding feature in X-band region. The enhanced absorption is attributed to the multiple reflections, dielectric loss, polarization loss and magnetic loss originated from the unique porous structure and condensed Ni-chains networks. This study paves a low-cost and scalable method for the design of novel, lightweight, thermal insulation and efficient EMI shielding composite foams characterized by optimized microcellular structure and conductive-magnetic Ni-chains networks with promising prospect for applications in construction, aerospace and electronics filed.
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Hui Yong,Yiwan Chen,Yanquan Ji,Shuai Wang,Jiangwei Ma,Baosheng Liu,Jifan Hu,Yanghuan Zhang
Solid-state magnesium-based hydrogen storage encounters challenges associated with sluggish hydrogen absorption and desorption kinetics. The incorporation of catalysts is considered a promising means to improve the hydrogen absorption and desorption kinetics of these alloys. In this experiment, we prepared the Mg 80 Ni 15 Y 5 alloy via vacuum melting and incorporated TiF 3 in varying weight percentages of 1, 3, 5, and 7 wt% through ball milling . The phase composition and microstructure of the samples were analyzed and measured using X-ray diffraction meter (XRD), Transmission Electron Microscope (TEM), Selected Area Electron Diffraction (SAED), and Scanning Electron Microscope (SEM) techniques. The results revealed that the TiF 3 introduced two catalytically phases, MgF and TiF 2 . And TiF 2 transforms into TiH 2 after hydrogen absorption, which covers the surface of MgH 2 and prolongs the nucleation time of MgH 2 .Furthermore, the addition of TiF 3 made the surface of alloy markedly coarser and more irregular and few cracks, providing channels for hydrogen diffusion. This behavior optimized the kinetic performance of the alloy. It was observed that the samples containing 7 wt%TiF 3 achieved 99.2 % hydrogen saturation even in low-temperature. It's worth mentioning that the addition of 7 wt% TiF 3 to the Mg 80 Ni 15 Y 5 alloy significantly reduced the dehydrogenation activation energy to 58.5 kJ/mol, as opposed to pure magnesium with an activation energy of 158.2 kJ/mol. This substantial reduction has effectively accelerated the hydrogen absorption and desorption rates of the alloy. However, it had only a negligible impact on the thermodynamic properties of the sample with 7 wt%TiF 3 .
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Anhua Ren,Min Kang,Xiuqing Fu
This study aimed to evaluate the corrosion behaviour of composite coatings with MoS 2 doping. Herein, the jet electrodeposition technique was used to prepare Ni/WC-MoS 2 composite coatings with different MoS 2 doping concentrations. Then, the composition, morphology, surface contact angle and so on, of coatings’ surfaces were characterised. The corrosion behaviour of the composite coatings with different nano-MoS 2 doping concentrations was investigated in 3.5 wt% NaCl. The corrosion mechanism of composite coatings in the corrosion process was also analysed. Results indicated that the MoS 2 -doped composite coatings had fewer surface micro-defects than Ni/WC coatings. Micro-nano structures such as ‘cauliflower’ and ‘nodules’ occurred on the coating’s surface with MoS 2 doping. As the MoS 2 doping concentration increased, the hydrophobic surface angle of the coating could be increased up to 132.5 °. After the corrosion test in 3.5 wt% NaCl solution, the surface of the composite coating without MoS 2 doping showed severe pitting corrosion. Therefore, the hydrophobicity allowed the Ni/WC-MoS 2 composite coating to offer excellent corrosion resistance with a predominantly uniform corrosion mechanism. The improved corrosion resistance of the composite coatings was attributed to the enhanced surface morphology and hydrophobicity . The more pronounced surface roughness and hydrophobicity helped the coating to trap air and form ‘air pockets’ when in contact with the corrosive medium, thereby blocking the corrosion process of Cl - . The Ni/WC-5 g/L MoS 2 composite coating had more positive corrosion potential ( Ecorr ) than other coatings, with a minimum corrosion current density ( I corr ) and corrosion rate ( CR ) of 0.0193 μA·cm −2 and 2.2446E-4 mm/a, respectively. Thus, the Ni/WC-MoS 2 composite coatings behaved with better corrosion resistance than Ni/WC composite coatings.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xun Wang,Zewei Liu,Jian Yan,Daofei Lv,Xin Chen,Feng Xu,Xin Zhou,Zhong Li
Developing adsorbents with exceptional CH 4 /N 2 selectivity under high pressure is a crucial commercial requirement and a significant technical challenge for the industrial high-pressure swing adsorption (HPSA) in CH 4 /N 2 separation. Only a few adsorbents were reported to address this issue. In this work, we aimed to explore two microporous MOFs with low-polarity channels for high-pressure CH 4 /N 2 separation. The Ni(BDC)(DABCO) 0.5 and its isostructural analog Ni(TMBDC)(DABCO) 0.5 were synthesized, characterized, and examined for high-pressure CH 4 /N 2 adsorption property. Due to the lower polarity channel originating from tetramethyl groups, Ni(TMBDC)(DABCO) 0.5 exhibited an exceptional methane capacity of 4.23 mmol/g and an IAST selectivity of 5.1 for the CH 4 /N 2 binary mixture at a pressure of 10 bar, surpassing the majority of previously reported materials. The GCMC simulation revealed that the low-polarity pore surfaces in both materials exhibited a higher affinity for CH 4 molecules compared to N 2 molecules, under both ambient and high pressures. The breakthrough experiments showed that Ni(TMBDC)(DABCO) 0.5 exhibited excellent dynamic separation towards CH 4 /N 2 under both 1 bar and 5 bar, indicating great potential as an emerging candidate for the recovery of CH 4 from coal-mine methane in industrial PSA processes.
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高影响因子
MACROMOLECULES
·
2012
·
IF 5.167
Aiguo Sui,Xincui Shi,Shupeng Wu,Hongkun Tian,Yanhou Geng,Fosong Wang
A new catalyst system, i.e., nickel acetylacetonate/1,3-bis(diphenylphosphino)propane (Ni(acac)2/dppp), was explored to catalyze the Kumada catalyst transfer polycondensation (KCTP) of three fluorene monomers with different substituents at 9-position. The “living” nature of the polymerization was confirmed by polymerization kinetic studies, “monomer addition” experiment and block copolymerizations. As a result, poly(9,9-dioctylfluorene)s (PF8s) with the number-average molecular weights (Mns) in the range 2.8–62.2 kDa and polydispersity indices (PDIs) of ∼1.20 were successfully synthesized in a controlled manner. The syntheses of fluorene-fluorene and fluorene-thiophene diblock copolymers with Mns up to 46 kDa were also demonstrated. A complex, i.e. Ni(dppp)(acac)2, with an octahedral coordination geometry was isolated and confirmed by X-ray crystallographic analysis. The polymerization experiments indicated that the in situ formed Ni(dppp)(acac)2 should be the active catalyst. To the best of our knowledge, this is the first report on the controlled synthesis of polyfluorenes (PFs) via KCTP.
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高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 8
·2301-2312
·
IF 6.367
Xueying Qiu,Jiaxi Liu,Shujun Qiu,Pengru Huang,Hailiang Chu,Yongjin Zou,Huanzhi Zhang,Fen Xu,Lixian Sun
It is a very challenging task to develop high-performance metal catalysts for hydrolytic dehydrogenation of ammonia borane (AB, NH3BH3). In this work, cobalt–nickel layered double oxide (CoNi-LDO) with a sea urchin-like structure is prepared through the calcination of its corresponding layered double hydroxide (CoNi-LDH). As a catalyst support, ruthenium nanoparticles are loaded on CoNi-LDO by chemical reduction to form Ru/LDO catalysts. The effect of the reduction method (i.e., liquid-phase reduction and gas-phase reduction) and the auxiliary reagent citric acid (CA) on their catalytic properties for hydrogen production from AB hydrolysis is systematically studied. It takes only about 85 s at room temperature for the completion of AB hydrolysis in the presence of the as-prepared Ru-CA/LDO-G catalyst, which exhibits a much lower activation energy (Ea = 25.94 kJ mol−1) and relatively higher activity (TOF = 501.4 molH2 molRu−1 min−1). These experimental results are further confirmed by theoretical calculations, during which there is strong adsorption of AB molecules and easy activation of water molecules on Ru/LDO-G. Therefore, Ru/CoNi-LDO as a catalyst exhibits potential application in the field of hydrogen evolution from hydrolysis of hydroborates such as AB and NaBH4.
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高影响因子
ChemSusChem
·
2022
·Vol. 15
·期 13
·e202200233
·
IF 9.14
Zuojun Wei,Yuran Cheng,Hao Huang,Zhihe Ma,Kuo Zhou,Yingxin Liu
Graphical Simply the best : 14 Secondary metals and 6 catalytic supports are screened to fabricated Ni-based 10NiMn(4 : 1)/γ-Al 2 O 3 catalyst with improved activity and stability for the reductive amination of 5-hydroxymethylfurfural to 2,5-bis(aminomethyl)furan, which is attributed to the electron transfer effect between active Ni particles and the well-dispersed MnO x on the γ-Al 2 O 3 support. Mono- and bimetallic Ni-based catalysts were prepared by screening 6 supports and 14 secondary metals for reductive amination of 5-hydroxymethylfurfural (5-HMF) into 2,5-bis(aminomethyl)furan (BAMF), among which γ-Al 2 O 3 and Mn were the best candidates. By further optimization of the reaction conditions at 0.4 g catalyst loading for 0.5 g substrate of 5-HMF and 160 °C of reaction temperature, 10Ni/γ-Al 2 O 3 and 10NiMn(4 : 1)/γ-Al 2 O 3 achieved the highest BAMF yields of 86.3 and 82.1 %, respectively. Although the BAMF yield values were comparable with that over Raney Ni, the turnover frequencies based on the initial BAMF yield and unit weight of Ni for 10NiMn(4 : 1)/γ-Al 2 O 3 , 10Ni/γ-Al 2 O 3 , and Raney Ni were calculated as 0.41, 0.09, and 0.04 h −1 , respectively. X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy showed that the existence of MnO x well dispersed on the γ-Al 2 O 3 support and its electron transfer effect with Ni particles on the surface of the support contributed to the high efficiency and better recyclability for the five-time reused 10NiMn(4 : 1)/γ-Al 2 O 3 catalyst.
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高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2017
·
IF 3.204
Chen Zhu,Jing-Pei Cao,Xiao-Yan Zhao,Tao Xie,Jie Ren,Xian-Yong Wei
Selective cleavage of C O bonds in benzyl phenyl ether (BPE) as a typical lignin α-O-4 ether to produce aromatics is a challenging and attractive topic. Herein, the earth-abundant first-row transition metals, such as Co, Ni and Cu were supported on activated carbon (Co/AC, Ni/AC and Cu/AC) to identify their ability for cleaving C O bond of BPE. Among these catalysts, Ni/AC exhibit highest activity for cleavage of C O bond. The reaction with BPE was carried out at pretty mild condition of 140 °C and 2 MPa H 2 , which is highly selective afforded toluene and phenol as the major products with the optimum yields of 88.5 and 86.5%, respectively. Based on the test, the reaction pathways were proposed. A abundant of dissociated H· atoms on Ni(0) sites forms surface active Ni H species; Ni(0) activates and facilitates cleavage of the C O bond in BPE to form benzyl (C 6 H 5 C·) and phenoxy radicals (C 6 H 5 O·); H· atoms spill from active species Ni H recombined together with C 6 H 5 C· and C 6 H 5 O· forming the products of toluene and phenol, respectively.
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高影响因子
危险品化学品经营许可证（带存储）