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Manipulating Na occupation and constructing protective film of P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2) as long-term cycle stability cathode for sodium-ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 603-611,I0013页

作者： Yiran Sun Pengfei Zhou Siyu Liu Zhongjun Zhao Yihao pan Xiangyan Shen Xiaozhong wu Jinping Zhao Junying weng Jin Zhou School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 0255000ShandongChina School of Materials Science and Engineering Shandong University of TechnologyZibo 255049ShandongChina

P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2)(NNMO)is promising cathode material for sodium-ion batteries(SIBs)due to its high specific capacity and fast Na+diffusion ***,the irreversible P2-O_(2)phase transformation,Na+/vacancy ordering,and transition metal(TM)dissolution seriously damage its cycling stability and restrict its commercialization ***,Na occupation manipulation and interface stabilization are proposed to strengthen the phase structure of NNMO by synergistic Zn/Ti co-doping and introducing lithium difluorophosp(LiPO_(2)F_(2))film-forming electrolyte *** Zn/Ti co-doping regulates the occupancy ratio of Nae/Nafat Na sites and disorganizes the Na+/vacancy ordering,resulting in a faster Na+diffusion kinetics and reversible P2-Z phase transition for P2-Na_(0.67)Ni_(0.28)Zn_(0.05)Mn_(0.62)Ti_(0.05)O_(2)(NNZMTO).Meanwhile,the LiPO_(2)F_(2)additive can form homogeneous and ultrathin cathode-electrolyte interphase(CEI)on NNZMTO surface,which can stabilize the NNZMTO-electrolyte interface to prevent TM dissolution,surface structure transformation,and micro-crack *** studies of in situ and ex situ characterizations and theoretical calculations were used to elucidate the storage mechanism of NNZMTO with Li PO_(2)F_(2)*** a result,the NNZMTO displays outstanding capacity retention of 94.44%after 500 cycles at 1C with 0.3 wt%Li PO_(2)F_(2),excellent rate performance of 92.5 mA h g^(-1)at 8C with 0.1 wt%Li PO_(2)F_(2),and remarkable full cell *** work highlights the important role of manipulating Na occupation and constructing protective film in the design of layered materials,which provides a promising direction for developing high-performance cathodes for SIBs.

关键词： Layered cathode Zn/Ti co-doping Na occupation Electrolyte additive Sodium-ion batteries

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Pilot Test of Preparing 2-Alkylanthraquinone Using Alkylation-Oxidation Technology

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China Petroleum Processing & Petrochemical Technology 2024年第1期26卷 88-97页

作者： Zheng Bo Qian Jianguo Shi Peng pan Zhiyong Qie Siyuan Zhang Yueqin Fei Jianqi Qiao Liang Zong Baoning SINOPEC Research Institute of Petroleum Processing Co. LtdBeijing 100083 Shijiazhuang United Petrochemical Co. LtdShijiazhuang 050011

To expedite the development of industrial technology for producing 2-alkylanthraquinone,a novel pilot test of alkylation-oxidation technology was *** process mainly included anthracene alkylation,separation of anthracene and 2-alkylanthracene,oxidation of 2-alkylanthracene,and product *** alkylation conditions yielded a 91.1%conversion of anthracene and a 71.73%selectivity for *** address the separation problem of anthracene and 2-alkylanthracene,solvent-assisted distillation technology was developed,resulting in a 98.9%purity of 2-alkylanthracene and a 91.82%separation *** the molar ratio of h2O_(2) to 2-alkylanthracene was 7:1,a 98.96%conversion of 2-alkylanthracene and a 99.94%selectivity for 2-alkylanthraquinone were achieved.A novel composition of 2-alkylanthraquinone,including 2-tert-butylanthraquinone,2-tert-amylanthraquinone,and 2-hexylanthraquinone,was *** composition could be effectively separated and purified through a combination of crystallization and washing *** elemental composition of the product met the existing standards,and its hydrogenation performance closely matched that of commercially available 2-tert-amylanthraquinone products.

关键词： anthracene 2-alkylanthracene 2-alkylanthraquinone alkylation oxidation hydrogen peroxide

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Effect of Ellipsoidal Particle Shape on Tribological Properties of Lubricants Containing Nanoparticles

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Chinese Journal of Mechanical Engineering 2024年第4期 244-255页

作者： Ling pan Zhi Li Yunhui Chen Guobin Lin School of Advanced Manufacturing Fuzhou University School of Mechanical Engineering and Automation Fuzhou University

Adding nanoparticles can significantly improve the tribological properties of lubricants. however, there is a lack of understanding regarding the influence of nanoparticle shape on lubrication performance. In this work, the influence of diamond nanoparticles(DNPs) on the tribological properties of lubricants is investigated through friction experiments. Additionally, the friction characteristics of lubricants regarding ellipsoidal particle shape are investigated using molecular dynamics(MD) simulations. The results show that DNPs can drastically lower the lubricant's friction coefficient μ from 0.21 to 0.117. The shearing process reveals that as the aspect ratio(α) of the nanoparticles approaches 1.0, the friction performance improves, and wear on the wall diminishes. At the same time, the shape of the nanoparticles tends to be spherical. when 0.85 ≤ α ≤ 1.0, rolling is ellipsoidal particles' main form of motion,and the friction force changes according to a periodic sinusoidal law. In the range of 0.80 ≤ α hibit sliding as the dominant movement mode. As α decreases within this range, the friction force progressively increases. The friction coefficient μ calculated through MD simulation is 0.128, which is consistent with the experimental data.

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An intermittent lithium deposition model based on bimetallic MOFs derivatives for dendrite-free lithium anode with ultrahigh areal capacity

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Chinese Chemical Letters 2024年第8期35卷 520-525页

作者： Tao wei Jiahao Lu pan Zhang Qi Zhang Guang Yang Ruizhi Yang Daifen Chen Qian wang Yongfu Tang School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China State Key Laboratory of Metastable Materials Science and Technology(MMST) Hebei Key Laboratory of Applied ChemistryYanshan UniversityQinhuangdao 066004China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China College of Energy Soochow UniversitySuzhou 215006China School of Low-carbon Energy and Power Engineering China University of Mining and TechnologyXuzhou 221116China

In the development of 3D conductive frameworks for lithium metal anode(LMA),two models have been proposed:top growth model and bottom-up growth ***,Li tends to accumulate on the top of these 3D frameworks with homogenous lithiophilicity(top growth)and Li dendrite still *** address this issue,some researchers have focused on developing 3D frameworks with gradient lithio-philicity,which realized bottom-up growth of ***,partial Li nucleation sites on the top of these frameworks were *** by the two models talked above,this work firstly proposed a novel intermittent lithiophilic model for lithium *** demonstrate the feasibility of this model,a bimetallic metal-organic frameworks derived ZnMn_(2)O_(4)-MnO nanoparticles were grown on carbon cloth for *** can cycle stably under ultra-high current and areal capacity(10 mA/cm^(2),10 mAh/cm^(2)).The in-situ optical microscopy(OM)was conducted to observe the Li deposition behavior,no dendrite was found during 80 h in ester-based electrolyte while the pure Li only cycled for *** is more,it can also be well-coupled with LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)cathode and solid-state electrolyte,which further prove the advantages of the intermittent model for the development of LMAs with high safety and high energy density.

关键词： Intermittent lithiophilic model Lithium metal anode(LMA) Three-dimensional(3D)frameworks Lithiophilic Bimetallic metal-organic frameworks(MOFs)

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MoS_(x) nanowire networks derived from[Mo_(3)S_(13)]^(2−) clusters for efficient electrocatalytic hydrogen evolution

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Nano Research 2024年第8期17卷 6910-6915页

作者： haoxuan Yu Junan pan Kang Chen wang Chao Zechao Zhuang Sizhuo Feng Jianmei Chen Lingbin Xie Longlu wang Qiang Zhao College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts and Telecommunications9 Wenyuan RoadNanjing 210023China Department of Chemical Engineering Columbia UniversityNew YorkNY 10027USA Institute of Advanced Materials(IAM)&Institute of Flexible Electronics(Future Technology) Nanjing University of Posts and Telecommunications9 Wenyuan RoadNanjing 210023China

Precise design and synthesis of sub-nano scale catalysts with controllable electronic and geometric structures are pivotal for enhancing the hydrogen evolution reaction(hER)performance of molybdenum sulfide(MoS_(2))and unraveling its structure−activity *** leveraging transition molybdenum polysulfide clusters as functional units for multi-level ordering,we successfully designed and synthesized MoS_(x)nanowire networks derived from[Mo_(3)S_(13)]^(2−) clusters via evaporationinduced self-assembly,which exhibit enhanced hER activity attributed to a high density of active sites and dynamic evolution behavior under cathodic ***_(x) nanowire networks electrode yields a current density of 100 mA·cm^(−2) at 142 mV in 0.5 M h_(2)SO_(4).This work provides an attractive prospect for optimizing catalysts at the sub-nano scale and offers insights into a strategy for designing catalysts in various gas evolution reactions.

关键词： MoS_(x) nanowire networks [Mo_(3)S_(13)]^(2−)clusters hydrogen evolution reaction(hER) sub-nano scale

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Nitrogen and fluorine co-doped graphene for ultra-stable lithium metal anodes

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Nano Research 2024年第8期17卷 7212-7220页

作者： pan Li Yifan Liu Xujian Bao Jinghao Xie Zhao Li hongcheng Li Qiang Ren Xiaomiao Feng Yue hu Yanwen Ma State Key Laboratory for Organic Electronics and Information Displays(KLOEID)and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325000China

The heteroatom doping strategies have been utilized to effectively improve the performance of the carbon-based hosts,such as graphene,for lithium(Li)metal in high energy density lithium metal ***,solely doped graphene hosts often need the assistance of other materials with either better lithiophilicity or electronic conductance to achieve smooth and efficient deposition of Li,which adds extra weight or ***,graphene co-doped by nitrogen and fluorine(NFG)is employed as a stable host for Li,where the N-doping provides lithiophilicity and electronic conductivity lacked by F-doping and the F-doping facilitates fast formation of solid electrolyte interphase(SEI)retarded by *** well regulation of Li plating/stripping and SEI formation is verified by quickly stabilized and small-magnitude voltage hysteresis,which stands out in Li hosts based on doped graphene and leads to excellent long-term cycling performance of NFG based electrodes.A voltage hysteresis of 20 mV is observed for more than 850 h in the symmetrical *** remarkable efficiency of lithium usage is confirmed by the highcapacity retention of a full cell paired with LiFePO_(4)(LFP),which exceeds 70%after 500 *** work presents an innovative perspective on the control of Li plating/stripping by simultaneously introducing two kinds of dopants into graphene and paving the way for exploring practical Li metal batteries.

关键词： Co-doped graphene lithium metal anode dendrite suppression lithiophilic skeleton solid electrolyte interphase(SEI)formation

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Tandem hydroalkylation and deoxygenation of lignin-derived phenolics to synthesize high-density fuels

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Chinese Journal of Chemical Engineering 2024年第2期66卷 104-109页

作者： Rui Yu Zhensheng Shen Yanan Liu Chengxiang Shi Juncong Qu Lun pan Zhenfeng huang Xiangwen Zhan g Ji-Jun Zou Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Collaborative Innovative Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Lignin is the most abundant naturally phenolic biomass,and the synthesis of high-performance renewable fuel from lignin has attracted significant *** propose the efficient synthesis of high-density fuels using simulated lignin cracked oil in tandem with hydroalkylation and deoxygenation ***,we investigated the reaction pathway for the hydroalkylation of phenol,which competes with the hydrodeoxygenation form *** then,we investigated the effects of metal catalyst types,the loading amount of metallic,acid dosage,and reactant ratio on the reaction *** phenol hydroalkylation and hydrodeoxygenation were balanced when 180℃ and 5 MPa h_(2)with the alkanes yield of 95%.By extending the substrate to other lignin-derived phenolics and simulated lignin cracked oil,we obtained the polycyclic alkane fuel with high density of 0.918 g·ml^(-1)and calorific value of41.2 MJ·L^(-1).Besides,the fuel has good low-temperature properties(viscosity of 9.3 mm^(2)·s^(-1)at 20℃ and freezing point below-55℃),which is expected to be used as jet *** work provides a promising way for the easy and green production of high-density fuel directly from real lignin oil.

关键词： high-density fuel Biofuel hydrogenation Alkylation Lignin Phenolics

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Stabilizing zinc anode using zeolite imidazole framework functionalized separator for durable aqueous zinc-ion batteries

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Journal of Energy Chemistry 2024年第3期90卷 23-31,I0003页

作者： weisong Zhang Xinyan Zhu Ling Kang Ziyu Peng Jing Zhu Liang pan Lei Dai Shude Liu Ling wang Yongguang Liu Zhangxing he School of Chemical Engineering North China University of Science and TechnologyTangshan 063009HebeiChina Shanghai Key Laboratory of Multidimensional Information Processing East China Normal UniversityShanghai 201620China College of Textiles Donghua UniversityShanghai 201620China

Aqueous zinc-ion batteries(AZIBs) hold great promise as a viable alternative to lithium-ion batteries owing to their high energy density and environmental ***,AZIBs are consistently plagued by the formation of zinc dendrites and concurrent side reactions,which significantly diminish their overall service life,In this study,the glass fiber separator(GF) is modified using zeolite imidazole salt framework-8(ZIF-8),enabling the development of efficient ***-8,which is abundant in nitrogen content,efficiently regulates the desolvation of [Zn(h_(2)O)_(6)]^(2+) to inhibit hydrogen ***,it possesses abundant nanochannels that facilitate the uniform deposition of Zn~(2+) via a localized action,thereby hindering the formation of *** insulating properties of ZIF-8 help prevent Zn^(2+) and water from trapping electron reduction at the layer surface,which reduces corrosion of the zinc ***,ZIF-8-GF achieves the even transport of Zn^(2+) and regulates the homogeneous deposition along the Zn(002) crystal surface,thus significantly enhancing the electrochemical performance of the AZIBs,In particular,the Zn|Zn symmetric cell with the ZIF-8-GF separator delivers a stable cycle life at0.5 mA cm^(-2) of 2300 *** Zn|ZIF-8-GF|MnO_(2) cell exhibits reduced voltage polarization while maintaining a capacity retention rate(93.4%) after 1200 cycles at 1.2 A g^(-1) The unique design of the modified diaphragm provides a new approach to realizing high-performance AZIBs.

关键词： Aqueous zinc-ion batteries Separators modifications ZIF-8 Zn deposition Dendrite-free

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Microstructures and mechanical properties of laser-directed energy deposited CrCoNi medium-entropy alloy

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Rare Metals 2024年第7期43卷 3286-3300页

作者： wen-Jie Zhao Chang-Yu Liu Peng-Cheng Che Zhi-Liang Ning hong-Bo Fan Jian-Fei Sun Yong-Jiang huang Alfonso h.w.Ngan National Key Laboratory for Precision hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China Space Environment Simulation Research Infrastructure Harbin Institute of TechnologyHarbin 150001China Department of Mechanical Engineering The University of Hong KongHong Kong 999077China

The distinctive intrinsic heat treatment(IhT)originating from cyclic reheating in the laser-directed energy deposition(LDED) has attracted growing attention in recent *** this investigation,simulations and experimental characterizations were performed to examine the impact of IhT on the micros true ture and mechanical properties of LDED-fabricated CrCoNi medium-entropy alloy(MEA).The results show that the intensity of the IhT is proportional to the utilized laser energy density(LED).As the LED increased,significant dynamic recrystallization and grain refinement occurred within the alloy due to the enhanced intensity of ***,the high LED leads to severe hot cracking within the as-built MEA,resulting in inferior *** decreasing LED,the hot cracking was effectively ***,low LED weakened the intensity of IhT and consequently inhibited kinetic conditions of dynamic recrystallization,resulting in a heterogeneous grain structure characterized by multi-scale-sized *** structure provides significant hetero-deformation-induced hardening during plastic deformation,enabling the alloy to have a sustainable work-hardening *** expect that this work will have implications in taking full advantage of the unique IhT of the LDED process to fabricate ME As with excellent metallurgical quality and mechanical performance.

关键词： Intrinsic heat treatment Laser-directed energy deposition CrCoNi MEA Dynamic recrystallization heterogeneous grain structure

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鲍鱼脏器碱提多糖制备工艺及对L929细胞h_(2)O_(2)氧化损伤的修复活性

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食品工业科技 2024年第13期45卷 204-211页

作者：吴启赐林志超潘晓明薛钰黄家福潘裕添闽南师范大学菌物产业工程技术中心福建漳州363000 萌得尔(厦门)生物科技有限公司福建厦门361000

目的:优化鲍鱼脏器碱提多糖(Alkali-extracted abalone viscera polysaccharides,Aavp)提取工艺,并研究纯化Aavp对L929细胞h_(2)O_(2)氧化损伤的预防和修复作用,以期为鲍鱼脏器碱提多糖的开发及应用提供参考。方法:通过热碱提醇沉法获... 详细信息

目的:优化鲍鱼脏器碱提多糖(Alkali-extracted abalone viscera polysaccharides,Aavp)提取工艺,并研究纯化Aavp对L929细胞h_(2)O_(2)氧化损伤的预防和修复作用,以期为鲍鱼脏器碱提多糖的开发及应用提供参考。方法:通过热碱提醇沉法获得鲍鱼脏器碱提粗多糖,并利用响应面法优化提取工艺,最后分析纯化Aavp对L929细胞h_(2)O_(2)氧化损伤的预防和修复能力。结果:鲍鱼脏器碱提粗多糖最佳提取工艺条件为:料液比1:150 g/mL,提取时间2 h,提取温度70℃,在此条件下,鲍鱼脏器碱提粗多糖得率为8.57%。在L929细胞h_(2)O_(2)氧化损伤预防试验中,不同剂量的纯化Aavp(20、50和100μg/mL)对L929细胞氧化损伤均具有极显著的预防作用(Ph_(2)O_(2)氧化损伤具有出较好的预防和修复作用。结论:鲍鱼脏器碱提多糖具有一定的L929细胞h_(2)O_(2)氧化损伤修复能力。

关键词：鲍鱼脏器碱提多糖响应面优化氧化损伤

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