ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Wei Gu,Qingyu Dong,Lei Zheng,Ya Liu,Yayun Mao,Yanfei Zhao,Wenchuan Duan,Hongzhen Lin,Yanbin Shen,Liwei Chen
Ni-rich layered oxides, such as LiNi0.8Co0.1Mn0.1O2 (NCM811), are considered as promising cathode materials for lithium-ion batteries due to their high energy density. However, Ni-rich layered oxides are prone to react with water and carbon dioxide in ambient air forming residual lithium compounds, resulting in deterioration of electrochemical performance and bringing a challenge to the cathode electrode preparation. In this work, we have, for the first time, demonstrated that the chemical stability of the NCM811 material in ambient air can be significantly enhanced by passivating the surface with a hydrophobic self-assembled monolayer (SAM) of octadecyl phosphate (OPA). As a result, the degradation reaction between the NCM811 material and ambient air and thus the electrochemical performance deterioration were significantly suppressed during ambient air exposure. Specifically, the 5C-rate capacity retention deterioration of the NCM811 sample during 14-day ambient air exposure has been decreased from 12 to 2% by OPA passivation. Furthermore, the 200-cycle capacity retention deterioration of the NCM811 sample after 7-day ambient air exposure has been improved from 23 to 0.7% by OPA passivation. These results are very important for the practical application of Ni-rich oxide since no need for controlling of humidity is required on the cathode manufacture; thus, the cost can be reduced. The concept of molecular self-assembly on the NCM811 material also open vast possibilities to design reagents for surface passivation of Ni-rich layered oxides.
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DOI
PubMed
高影响因子
Engineering
·
2021
·
IF 7.553
Xinyu Cao,Tiancheng Pu,Bar Mosevitzky Lis,Israel E. Wachs,Chong Peng,Minghui Zhu,Yongkang Hu
Reductive pretreatment is an important step for activating supported metal catalysts but has received little attention. In this study, reconstruction of the supported nickel catalyst was found to be sensitive to pretreatment conditions. In contrast to the traditional activation procedure in hydrogen, activating the catalyst in syngas created supported Ni nanoparticles with a polycrystalline structure containing an abundance of grain boundaries. The unique post-activation catalyst structure offered enhanced CO adsorption and an improved CO methanation rate. The current strategy to tune the catalyst structure via manipulating the activation conditions can potentially guide the rational design of other supported metal catalysts.
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DOI
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 10
·1847-1853
·
IF 3.849
Jun-Qiang Bai,Wei Wen,Jin-Ming Wu
Because of the high specific surface area and enhanced charge migration, TiO2 with unique belt-like nanostructures finds promising applications in various fields such as photocatalysis, dye-sensitized solar cells, gas sensors, and Li-ion batteries. In the current study, a solution combustion procedure was firstly adopted to prepare a black water-proof precursor. The black precursor interacted with H2O2 at ambient temperature, achieving a precursor solution that is capable of fabricating hydrogen titanate (H2Ti2O5·H2O) nanobelt arrays on metallic Ti substrates at 60 °C. Subsequent calcination in air at 400 °C achieved arrays of ultrathin anatase TiO2 nanobelts of ca. 2–4 nm in thickness. The addition of nickel nitrate in the combustion solution achieved the Ni-doping into the resultant TiO2 nanobelts, which did not alter the nanobelt structure but significantly reduced the band gap from 3.2 eV to 2.9 eV. When compared with the commonly alkali-hydrothermal synthesized anatase TiO2 nanobelts, the present ultrathin nanobelts exhibited much improved photocatalytic activity when utilized to assist photodegradation of rhodamine B in water. The ultrathin nanobelt structure is believed to contribute to the high specific surface area, the much reduced charge migration path, and the enhanced charge transport along the longitudinal direction. The appropriate Ni-doping further enhanced the photocatalytic performance, because of the increased light harvesting efficiency and reduced charge recombination.
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高影响因子
Crystals
·
2018
·Vol. 8
·期 11
·397
·
IF 2.144
Lingxiao Chen,Hang Liu,Linghao Liu,Yifan Zheng,Haodong Tang,Zongjian Liu
Ni nano-micro structures have been synthesized via a solution reduction route in the presence of ethylenediamine (EDA) under strong alkaline conditions. The phase composition, morphology, and microstructure of the resulting products are investigated by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The presence of EDA plays an important role in the formation of Ni nano-micro structures, and microflowers or microspheres assembled from nanosized horns can be produced by changing the amount of EDA. The size of Ni nano-micro structures is dependent on the NaOH concentration, and long chains assembled from Ni nano-micro structured microspheres can be obtained by reducing the amount of NaOH solution used. The role of both EDA and NaOH in the reduction of Ni (II) to Ni, as well as in the growth of Ni nano-micro structures, has been discussed, and a possible formation mechanism of these Ni nano-micro structures has been proposed based on the experimental results.Keywords:ethylenediamine;microspheres;nanohorns;nano-micro structures;nickel
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高影响因子
Nanoscale Advances
·
2020
·Vol. 2
·期 3
·1084-1089
·
IF 0
Shuli Yin,Ziqiang Wang,Chunjie Li,Hongjie Yu,Kai Deng,You Xu,Xiaonian Li,Liang Wang,Hongjing Wang
Rational design of Pt-based nanostructures with a controllable morphology and composition is vital for electrocatalysis. Herein, we demonstrate a dual-template strategy to fabricate well-defined cage-bell nanostructures including a Pt core and a mesoporous PtM (M = Co, Ni) bimetallic shell (Pt@mPtM (M = Co, Ni) CBs). Owing to their unique nanostructure and bimetallic properties, Pt@mPtM (M = Co, Ni) CBs show higher catalytic activity, better durability and stronger CO tolerance for the methanol oxidation reaction than commercial Pt/C. This work provides a general method for convenient preparation of cage-bell nanostructures with a mesoporous bimetallic shell, which have high promising potential for application in electrocatalytic fields.
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DOI
PubMed
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 22
·11229-11235
·
IF 8.867
Jiahao Yu,Gongzhen Cheng,Wei Luo
Developing low-cost, highly efficient, and superior stable electrocatalysts for the oxygen evolution reaction (OER) is essential for upcoming renewable and clean energy systems. Here, 3D ternary nickel iron phosphide microflowers with a hierarchically porous morphology directly grown on Ni foam via a successive hydrothermal and phosphidation method are synthesized. Benefitting from their unique 3D hierarchical microflower-like structure and the strong electron interactions between Fe, Ni and P, the as-synthesized (NixFe1−x)2P catalysts can effectively catalyze the OER with an overpotential of 219 mV at a current density of 20 mA cm−2 in alkaline media, which is, to the best of our knowledge, the best among the reported non-noble metal-based catalysts.
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DOI
高影响因子
Nature Sustainability
·
2026
·
IF 32.1
Zou Xingyue,Zhang Jinzhe,Xie Jiawei,Dong Houyan,Zhou Bing,Dai Jie,Zhao Long,Wang Jiaxian,Zhan Guangming,Lian Wengao,Cao Xuelei,Liu Bingyan,Gu Xiang-Kui,Yao Yancai,Zhang Lizhi
Accelerating the global transition to sustainable green hydrogen requires highly efficient and durable industrial water electrolysis. However, the anodic oxygen evolution reaction remains a critical bottleneck. Conventional nickel-based catalysts suffer from high overpotential or rapid degradation. Here we overcome this limitation by introducing asymmetric Mo–Ni atom pairs with a shortened interatomic distance of 2.85 Å. This unique structural configuration enables an oxide path mechanism with direct O–O coupling that bypasses traditional scaling relations. Consequently, the catalyst delivers exceptional durability for over 2,000 h at an industrially relevant current density of 3 A cm −2 . When integrated into a laboratory-scale anion-exchange membrane water electrolyser, the anode exhibits low cell voltages of 1.78–1.95 V at 2–3 A cm −2 , alongside more than 1,200 h of stable operation at 3 A cm −2 . To demonstrate commercial viability, we integrate the catalyst into a 71 cm 2 per cell anion-exchange membrane water electrolyser stack, achieving hydrogen production with >99% purity while slashing energy consumption and production costs by 10–17% compared with commercial benchmarks. We further establish a mass-production line for these oxygen evolution reaction electrodes, proving their scalable manufacturing viability and potential to drive cost-effective, zero-emission fuel production at an industrial scale.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Yihan Zhang,Shihong Zhang,Yi He,Hongjie Li,Teng He,Yi Fan,Huili Zhang
Ni-B/B 4 C composite coatings on N80 steel were achieved by pulsed electrodeposition (PED). The optimal condition for obtaining composite coating is investigated via studying the effects of different content B 4 C on the performance of Ni-B/B 4 C coatings, including the surface morphology , microstructure, hardness and electrochemical properties . Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and energy dispersive spectrometer (EDS) were used to analyze the surface morphology, crystal morphology and element type and content of the composite coatings. The hardness of coatings was investigated by micro-hardness test. The electrochemical properties of coatings were demonstrated by electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscope (SECM). Results show that the grain was uniformly deposited on the surface of N80 steel, and no pinholes and microcracks were captured. Besides, the average Vickers hardness of the Ni-B/B 4 C was the highest (1030.61 HV), and the average coefficient of friction (COF) is 0.22 (the average COF of Ni-B is 0.49). In 3.5 w % NaCl solution, Ni-B/B 4 C (2 g L −1 ) exhibits good corrosion resistance , with a corrosion voltage of − 0.30 − 0.010 + 0.010 V, and a corrosion current of − 1.15 − 0.220 + 0.219 μA.
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高影响因子
Materials Chemistry Frontiers
·
2025
·
IF 6.4
Jun Song,Minghao Kang,Yongping Li,Jiaqing Guo,Huibo Wang,Liwei Liu,Junle Qu,Shuai Ye
Due to their excellent biocompatibility, outstanding water dispersibility, and multifunctional integration capability, carbon dots have emerged as highly promising materials for cancer phototherapy. In this study, nickel-doped carbon dots (Ni-CDs) were successfully synthesized via a one-step hydrothermal method, which enables efficient and uniform Ni incorporation within the carbon framework. Ni-CDs exhibit strong absorbance in the range of 840–1100 nm. They have a reactive oxygen species (ROS) production rate of 3.27% and a photothermal conversion efficiency of 61.33% under 1064 nm laser irradiation. The enhanced dual-mode performance can be attributed to Ni-induced nonradiative relaxation and improved electron transfer. They are the first reported nickel-doped carbon dots with synergistic therapeutic capabilities of PDT/PTT in the NIR-II region. In vitro and in vivo experiments demonstrated that Ni-CDs can effectively induce tumor cell death, with no significant toxic damage observed in normal tissues/organs. This study highlights the potential of Ni-CDs as a multifunctional nanoplatform for deep-tissue cancer treatment, providing a reference for the design of materials for the synergistic combination of photothermal and photodynamic therapy of deep tumors.
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产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 7
·932
·
IF 4.034
Dazheng Chen,Gang Fan,Hongxiao Zhang,Long Zhou,Weidong Zhu,He Xi,Hang Dong,Shangzheng Pang,Xiaoning He,Zhenhua Lin,Jincheng Zhang,Chunfu Zhang,Yue Hao
Indium thin oxide (ITO)-free planar perovskite solar cells (PSCs) were fabricated at a low temperature (150 °C) in this work based on the transparent electrode of photolithography processed nickel/gold (Ni/Au) mesh and the high conductivity polymer, PH1000. Ultrathin Au was introduced to increase the conductivity of metal mesh, and the optimal hexagonal Ni (30 nm)/Au (10 nm) mesh (line width of 5 μm) shows a transmittance close to 80% in the visible light region and a sheet resistance lower than 16.9 Ω/sq. The conductive polymer PH1000 not only smooths the raised surface of the metal mesh but also enhances the charge collection ability of metal mesh. The fabricated PSCs have the typical planar structure (glass/Ni-Au mesh/PH1000/PEDOT:PSS/MAyFA1−yPbIxCl3−x/PCBM/BCP/Ag) and the champion PSC (0.09 cm2) obtains a power conversion efficiency (PCE) of 13.88%, negligible current hysteresis, steady current density and PCE outputs, and good process repeatability. Its photovoltaic performance and stability are comparable to the reference PSC based on the ITO electrodes (PCE = 15.70%), which demonstrates that the Ni/Au mesh transparent electrodes are a promising ITO alternative to fabricate efficient PSCs. The relatively lower performance of Ni/Au based PSC results from the relatively slower charge extraction and stronger charge recombination than the ITO based PSC. Further, we tried to fabricate the large area (1 cm2) device and achieve a PCE over 6% with negligible hysteresis and steady current density and PCE outputs. The improvements of perovskite film quality and interface modification should be an effective approach to further enhance the device performance of Ni/Au based PSCs, and the Ni/Au mesh electrode may find wider applications in PSCs and flexible devices.Keywords:metal mesh;transparent electrode;photolithography;perovskite solar cell;large-area solar cell
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PubMed
高影响因子
IONICS
·
2022
·Vol. 29
·期 3
·1003-1011
·
IF 2.961
Jiang Guanghui,Liu Lei,Fei Zitong,Meng Qi,Zhang Yingjie,Dong Peng,Ouyang Quansheng,Ke Ding,Wang Jiqun,Yang Anqi
The large-scale lithium-ion batteries (LIBs) have begun to retire, and their disposal and reuse is a challenge. Herein, a regenerative and coating synergistic strategy is adopted to achieve the Li 3 PO 4 -coated and regeneration of LiNi 0.5 Co 0.2 Mn 0.3 O 2 material. The temperature was confirmed great influence to regenerate. The sample of 850 °C has the best cycle performance and rate performance, and the capacity retention rate is more than 80% after 100 cycles at 1 C. The recovery of material properties is due to structural repair and Li 3 PO 4 coating. The coating and regeneration strategy can be applied to the regeneration of other cathode materials and provides guidance for the treatment and reuse of waste LIBs electrolyte.
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DOI
高影响因子
ENERGY & FUELS
·
2012
·
IF 2.721
Hualiang Zuo,Qiying Liu,Tiejun Wang,Longlong Ma,Qi Zhang,Qing Zhang
Catalytic hydrodeoxygenation (HDO) of vegetable oils to renewable alkane-type biofuels has attracted more and more concern in recent years. However, the presently used catalysts were mainly focused on the sulfided CoMo and NiMo catalysts, which inevitably posed sulfur contamination in final products. Therefore, exploring nonsulfured catalyst for this processing is of fundamental importance, but it is still an open challenge. In this paper, we prepared the sulfur free Ni supported on SiO2, γ-Al2O3, SAPO-11, HZSM-5, and HY by incipient wetness impregnation and tested the catalytic performance in HDO of methyl palmitate. Alkanes with long carbon chains were mainly produced with two possibly parallel approaches: hydrogenation of hexadecanal to hexadecanol, followed by dehydration/hydrogenation to C16 alkane and decarbonylaton/decarboxylation of hexadecanoic acid to C15 alkane. The acidity of catalysts significantly influenced their catalytic performance, and the Ni/SAPO-11 catalysts with weak and medium acidity showed superior properties to the other catalysts due to the synergistic effect of metal Ni and acidic support. The maximum yield of 93% for C15+ alkanes was observed over 7 wt % Ni/SAPO-11 under the mild reaction conditions of 493 K and 2 MPa, indicating its promising application in this reaction.
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高影响因子
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