ACS Applied Materials & Interfaces
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2025
·
IF 8.2
Wenchao Niu,Jing Li,Jia Wang,Yujie Li
Single-crystalline Ni-rich LiNixMnyCo1–x–yO2 (SNCM, x ≥ 0.8) materials are regarded as next-generation cathodes for lithium-ion batteries. However, SNCM cathodes show readily low structural stability due to surface reconstruction and irreversible strain evolution during cycling at high voltages. Here, we demonstrate that Y2O3 material incorporated into SNCM cathodes forms an epitaxial entropy-assisted surface layer, which acts as a highly compatible region to facilitate Li-ion transmission, suppress interface reaction and transition metal dissolution. Meanwhile, soluble Al ions are uniformly distributed in the SNCM lattice and combine with the surface Y–O bond, forming a pillaring effect to restrain irreversible strain evolution, eventually prevent the formation of gliding and nanocracks during high-voltage cycling. As a result, the SNCM cathode with a Y2O3 surface and Al doping shows a high specific discharge capacity of 210.5 mAh·g–1 at 1 C within 2.75–4.4 V and a capacity retention of 86.6% after 100 cycles. This study offers a new insight into the design of a strain-retardant method for obtaining single-crystalline Ni-rich cathode materials with high performance.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiemin Han,Yifei Ma,Mei Wang,Zhaomin Tong,Jonghwan Suhr,Liantuan Xiao,Suotang Jia,Xuyuan Chen
Black coatings benefit from low reflectance or high light absorption are utilized in multifarious optical applications. Due to their unique three-dimensional nanostructure and π-band optical transitions, vertical graphene (VG) has drawn great attention to the field of black coatings. However, how the morphology of VGs affects reflectance has not been comprehensively disclosed yet. In addition, the morphology of the substrate for VG growth also affects the absorption properties. Here, we report a nano-and micro-engineered VG/Ni structure based on VG and laser-modified nickel foil, which possesses omnidirectional low reflectance of ∼0.25% over the visible range. A larger spacing of graphene nanowalls is more conducive to the formation of light traps and improves the absorption property. Besides, the surface of nickel substrate by laser irradiation presents a “cauliflower-like” microstructure, which further enhances light-trapping ability.
研究领域:
材料科学
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光学工程
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纳米技术
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表面工程
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功能涂层
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CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Yu Zhou,Wenjun Zhou,Chunhua Ni,Shenggang Yan,Liangmin Yu,Xia Li
Precursors of a nickel-based metal–organic framework, denoted Ni-MOF, and the loofah plant were prepared by the microwave method, and “tree blossom” Ni/Nitrogen doped Carbon (NC)/ Carbon (C) composites were prepared by in situ pyrolysis under an argon atmosphere. During pyrolysis, the morphology, specific surface area, porous structure and electromagnetic parameters of the Ni/NC/C composites were adjusted by adjusting the pyrolysis temperature. The maximum reflection loss of the corresponding Ni/NC/C composites can reach −63.1 dB at 13.84 GHz and a thickness of 2 mm when the pyrolysis temperature was 650 ℃ and the filling amount was 16 wt%. And the effective absorption bandwidth was 35.44 GHz when the thickness was adjusted from 1 mm to 5.5 mm within the range of 2–40 GHz. Excellent performance comes from conduction loss, dipole and interface polarization, magnetic resonance, multiple electromagnetic reflections and scattering, and equilibrium impedance matching.
研究领域:
材料科学
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纳米复合材料
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电磁功能材料
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能源材料
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环境功能材料
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高影响因子
FUEL
·
2022
·
IF 8.035
Ji Zhao,Jing-Hui Lv,Xian-Yong Wei,Qian-Qian Kong,Jia-Hao Li,Yang-Yang Zhang,Zhuang Li,Li Li,Zi-Chun Fan,Zhi-Min Zong
Ni/CeO 2 -La 2 O 3 with strong acidity was prepared by in - situ carbon templating (ISCT) and subsequent reduction with H 2 . The phase composition, specific surface area, morphology, acidity, and elemental valence composition of the catalyst were characterized. The catalytic methylation (CM I ) of phenol over the catalyst in different ratios of methanol to n -hexane was investigated under N 2 atmosphere. Over the catalyst, phenol was completely converted into 2,6-xylenol at 260 °C for 3 h via the CM I of phenol to o -cresol and subsequent CM I of o -cresol.
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Catalysis Science & Technology
·
2023
·Vol. 13
·期 5
·1488-1500
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IF 5
Huiyue Xin,Mengnan Li,Li Chen,Chen Zhao,Peng Wu,Xiaohong Li
NiO–LnOx (Ln = La, Ce or Pr) precursors were prepared using a sol–gel method with glucose as a template, and the corresponding Ni/LnOx catalysts were obtained by reduction in hydrogen at 500 °C. When applied to the selective hydrogenation of cinnamaldehyde (CAL), the Ni/La2O3 catalyst exhibited superior behavior to Ni/Pr6O11 and Ni/CeO2, affording 90.2% selectivity to hydrocinnamaldehyde (HCAL) with an initial activity of 0.57 s−1 under mild conditions. Various characterization techniques confirmed that the formation of the perovskite LaNiO3 precursor enhanced the interaction of Ni species with lanthanum species, and effectively avoided the agglomeration of Ni nanoparticles during the reduction. Hence, Ni nanoparticles could achieve high and uniform dispersion. Moreover, the CO group in CAL was preferentially adsorbed and fixed by weak and medium-strong basic sites (La3+–O2−) on the Ni/La2O3 catalyst, so that the chemisorption of the CC bond on active Ni nanoparticles becomes more favorable and thus the corresponding selective hydrogenation of the CC bond dominates.
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CHEMOSPHERE
·
2022
·
IF 8.943
Ying Liu,Xiaoya Liu,Xinying Liu,Yajing Li,Jinghuan Ma,Cong Ma
As one of the key factors that affect the application of hydrazine hydrate as a potential hydrogen source, efficient and cheap catalyst is particularly important. Nickel based catalysts have been widely studied because of their excellent catalytic performance for the decomposition of hydrazine hydrate to hydrogen. Herein, a Ni catalyst supported on anatase TiO 2 through reduction and impregnation methods was prepared. Structure of the catalyst was investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), and X-ray photoelectron spectroscopy (XPS). The effects of the amount of TiO 2 and the concentration of NaOH on the activity of the catalyst were investigated. The results showed that the catalyst prepared with a metal nickel content of 0.2 mmol using 100 mg of the nano-TiO 2 support had the best catalytic performance. Hydrazine hydrate could be completely decomposed at 343 K in 2.83 min, the hydrogen selectivity attained 100%, and the turnover frequency (TOF) value was 265.49 h −1 . In this catalyst, transition metal Ni was dispersed on the support surface in the form of amorphous elemental or oxide. Anatase TiO 2 support had the advantages of promoting the dispersion of metal Ni, exposing the active site, changing the electronic state of the active center, strengthening the strong metal-support interaction (SMSI), and improving the activity of the catalyst. After ten cycles of use, the performance of the catalyst stabilized and the hydrogen selectivity was still as high as 100%.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Liming Zeng,Tianxiang Yuan,Zerui Liu,Yongyang Zhu,Daifeng Wu,Dongxing Wang,Qing Zhou,Renheng Tang
Aiming at the sluggish water dissociation step in alkaline hydrogen evolution reaction (HER), the platinum-nickel alloy material (PtNi 10 /C) featuring unique crystalline/amorphous structure supported on carbon black is deliberately designed and fabricated via a reversely rapid co-precipitation and mild thermal reduction strategy. Electrochemical results show that only 66 mV of overpotential is needed for PtNi 10 /C to drive a current density of 10 mA cm −2 at a lower platinum loading (8.3 μg Pt cm-2 geo), which is much lower than that of other catalysts with a single metal source(S-Ni/C and S-Pt/C) and even the commercial Pt/C catalyst (20 wt%). The target catalyst also exhibits smaller tafel slope value (16.73 mV dec −1 ) and electrochemical impedance value, enabling a fast kinetics rate for water dissociation. Partial crystallization facilitates moderate adsorption of intermediates, while the high-valence Ni(II) and Pt(II) species serve as pivotal driving force for the kinetic dissociation of water. The unique microstructure of PtNi 10 /C shows a remarkable advantage toward HER in alkaline but acidic medium. In addition, other transition metal-based catalysts following the similar protocol are also fabricated and present varying degrees of HER performance. Hence, the facile and rapid co-precipitation/thermal reduction strategy proposed in this study provides some guidelines for designing high-efficiency alkaline HER catalysts.
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高影响因子
Advanced Materials Technologies
·
2023
·Vol. 8
·期 8
·2201688
·
IF 6.8
He Zhang,Jiayun Feng,Fangyuan Sun,Dongyan Zhou,Ge Cao,Shang Wang,Xuanyi Hu,Jingxuan Ma,Fengyu Su,Yanqing Tian,Yanhong Tian
Electrochromic devices (ECDs) with adjustable transmittance have opened new opportunities to the development of smart windows for energy-efficiency building. However, the switching between colored and bleached state of conventional ECD will bring extra energy consumption, the design of high-performance ECD with low consumption is still an elusive goal. To address this issue, a self-driven and energy-saving Ni anode-based ECD using Prussian blue as electrochromic material is developed. During the day, it can be colored by solar energy. By contrast, it can spontaneously bleach when the ECD's anode and cathode are short-circuiting using the internal redox potential during the night. It is worth noting that no extra energy is inputted in the coloring-bleaching cycle. In comparison with the ECD using electrolyte with high Ni 2+ (K + :Ni 2+ = 1:9) or high K + (K + :Ni 2+ = 9:1) concentration with poor optical contrast and cyclic stability (failed <100 cycles), the Ni-based ECD with the electrolyte containing equal amount of K + and Ni 2+ exhibits a high optical contrast (39.45%), good coloration response time (6 s), and excellent stability (1000 cycles). These properties suggest that the Ni-based electrochromic configuration is expected to be a catalyst for the development of energy-storage EC smart window in the future.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yanran Su,Liang Li,Dao Wang,Yang Xu,Lingling Ma,Gengping Wan,Changlong Du,Jun Liu,Ying Zhang,Qiyi Wei,Guizhen Wang
The development of electronic information technology has placed higher demands on microwave absorption materials (MAMs), especially the exploration of novel MAMs to broaden their application. At present, little attention has been given the wave absorption properties of transition metal borides (TMBs). In this work, a simple and economical method is developed to prepare Ni 3 B/Ni heterostructure nanosheets and their possible applications for microwave absorption (MA) and supercapacitor are evaluated. It is worth noting that Ni 3 B/Ni nanosheets exhibit excellent MA properties due to the aggregated nanosheet-like morphology of Ni 3 B/Ni with enhancing interfacial polarization, as well as the synergistic effect of dielectric and magnetic losses. It is observed in experiments that the minimum reflection loss value of Ni 3 B/Ni is −41.60 dB at 16.8 GHz. Moreover, the maximum effective absorption bandwidth can reach 3.28 GHz. Furthermore, Ni 3 B/Ni has good energy storage characteristics and is able to provide a specific capacity of 1150.6 F g −1 at a current density of 1 A g −1 . Meanwhile, it has the ability to maintain an initial capacity of 74.4 % after 1000 cycles at a current density of 10 A g −1 . Therefore, this study provides an idea to explore TMBs as high-performance MA and supercapacitor materials.
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Journal of Energy Storage
·
2023
·
IF 9.4
Tingting Dai,Xuesong Li,Liying Wang,Xijia Yang,Yang Gao,Qixian Zhang,Wei Lü
Ni-Co-O material is the most representative polymetallic compound and has exhibited excellent energy storage properties. However, the high cost of composite restricts the practical application of Ni-Co-O material. In this paper, a simple and low-cost method is used to grow Ni-Co-O/C nanoarrays directly on a conductive matrix. The results show that the three-dimensional nanoflower-like Ni-Co-O/C composite has better electrochemical performance than that of the nanosheet Co-O/C binary composite. This microstructure provides a shorter path for electron transport, making the material high electron transport efficiency. The specific capacitance of Ni-Co-O/C/AC asymmetric supercapacitor can reach 128.75 mF cm −2 at 2 mA cm −2 . Under the condition of 20 mA cm −2 , after 4000 cycles of charge and discharge, the capacitance retention rate is maintained at 99.8 %. This 3D flower-like structure not only helps provide an open framework and rapid ion diffusion, but also exposes more active sites and enhances charge storage performance. Ni-Co-O/C calcined in nitrogen shows more abundant defect structure and larger specific surface area, which is further conducive to Ni-Co-O/C electrodes to expose more active sites and enhance the rapid diffusion and reaction of electrolyte ions .
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RARE METALS
·
2023
·
IF 8.8
Li Wu-Lin,Zhang Qing-Qing,Dong Lin,Zhang Wen-Jun,Lin Li-Li,Chen Zu-Peng
Photocatalytic reductive amination of biomass-derived aldehydes is a desirable way to selectively upgrade biomass into value-added nitrogen-containing chemicals under mild conditions. However, it is challenging to produce imines in high selectivity because of the undesirable side reactions caused by the activity of functional groups. Here, we demonstrate the highly reactive and selective production of imines from biomass derived aldehydes via the photocatalytic reductive amination, using a defective TiO 2 supported nickel catalyst. The employment of methanol as the hydrogen donor and ammonia solution as the nitrogen source avoids the use of high-pressure H 2 and expensive amines, rendering the current catalytic process safe, economical, and environmentally friendly. In depth investigations attribute the improved separation and transfer of photogenerated charge carriers to the presence of oxygen vacancies and decorated Ni nanoparticles, thereby accelerating the production of imines from benzaldehyde amination (conversion, 95.8%; selectivity, 95.2%). Furthermore, the developed system could be easily translated to the photocatalytic conversions of various biomass derived aldehydes, which provided an example of a cost-effective and sustainable approach for the valorization of biomass derived feedstocks. Graphic abstract
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高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Shengzhe Wang,Hongxia Lv,Chengyu Jin,Yu Wang,Huangzhao Wei,Chenglin Sun,Lian Yu,Lei Ma,Xiangnan Li,Xiaowei Liu
We synthesized a series of Ru-Ti-Ni/CNT electrodes to degrade levofloxacin in wastewater. The unique structure of Ni single-atom-kernelled Ru nanoparticles regulates the reaction process, producing a notable synergistic effect. The reaction kinetics constant of Ru-Ti-Ni/CNT with a Ru: Ti ratio of 10:0 outperforms Ni/CNT by 3.7 times and CNT alone by 16.4 times. Comprehensive characterizations revealed its morphology and structure nature. Ru nanoparticles can shield Ni, while Ni single-atom facilitates electron transfer in Ru nanoparticles, generating abundant reactive oxygen radicals (ROS) that degrade pollutants.
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危险品化学品经营许可证（带存储）