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Rare Metals 2023年第6期42卷 1813-1820页

作者： Hao Shen li-jun jiang Ping li Hui-Ping Yuan Zhi-Nian li jun-Xian Zhang National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing100088China Institute for Advanced Materials and Technology University of Science and TechnologyBeijing100083China CNRS ICMPEUMR 7182Univ Paris Est CreteilThiais94320France GRIMAT Engineering Institute Co. Ltd.Beijing101407China

The effect of heat treatment on phase occurrence,crystal structures and hydrogen sorption properties of Y_(0.5)La_(0.2)Mg_(0.3-x)Ni_(2) compounds has been investigated.The targeted compounds were synthesized through induction melting and processed heat treatment at 700 and 900℃,respectively.Phase occurrence and structural properties were studied by X-ray powder diffraction(XRD).The global compositions and phase compositions have been determined by inductively coupled plasma-optical emission spectrometer(ICP-AES) and electron probe microanalysis(EPMA) respectively.

关键词： hydrogen treatment structural

Mechanochemistry and hydrogen storage properties of 2li_(3)N+Mg mixture

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Rare Metals 2022年第12期41卷 4223-4229页

作者： Zhi-Nian li Hao-Chen Qiu Shu-Mao Wang li-jun jiang jun Du jun-Xian Zhang Michel Latroche Fermin Cuevas Department of Energy Materials and Technology General Research Institute for Nonferrous MetalsBeijing 100088China UMR7182 CMTR/ICMPE/CNRS-UPEC94320 Thiais CedexFrance

The li-Mg-N-H hydrogen storage system is a promising hydrogen storage material due to its moderate operation temperature,good reversibility,and relatively high capacity.In this work,the li-Mg-N-H composite was directly synthesized by reactive ball milling(RBM) of li3N and Mg powder mixture with a molar ratio of 2:1 under hydrogen pressure of 9 MPa.More than 8.8 wt%hydrogen was absorbed during the RBM process.The phases and structural evolution during the in situ hydrogenation process were analyzed by means of in situ solidgas absorption and ex situ X-ray diffraction(XRD) measurements.It is determined that the hydrogenation can be divided into two steps,leading to mainly the formation of a lithium magnesium imide phase and a poorly crystallized amide phase,respectively.The H-cycling properties of the as-milled composite were determined by temperature-programmed dehydrogenation(TPD) method in a closed system.The onset dehydrogenation temperature was detected at 125℃,and it can reversibly desorb 3.1 wt% hydrogen under a hydrogen back pressure of 0.2 MPa.The structural evolution during dehydrogenation was further investigated by in situ XRD measurement.It is found that Mg(NH_(2))_(2)phase disappears at about 200 ℃,and li_(2)Mg_(2)N_(3)H_(3),liNH_(2),and li_(2)MgN_(2)H_(2)phases coexist at even 300 ℃,revealing that the dehydrogenation process is step-wised and only partial hydrogen can be desorbed.

关键词： Mechanochemistry Hydrogen storage properties li-Mg-N-H

Development of Ti_(0.85)Zr_(0.17)(Cr-Mn-V)_(1.3)Fe_(0.7)-based Laves phase alloys for thermal hydrogen compression at mild operating temperatures

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Rare Metals 2022年第8期41卷 2588-2594页

作者： Zi-Ming Cao Pan-Pan Zhou Xue-Zhang Xiao liu-jun Zhan Zhi-Fei jiang Shu-Mao Wang li-jun jiang li-Xin Chen State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Department of Materials Science and Engineering The University of ManchesterManchesterM139PLUK Institute of Energy Materials and Technology General Research Institute for Non-ferrous MetalsBeijing100088China Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou310013China

Metal hydride with proper hydrogen storage properties is the key component of hydride thermal hydrogen compressor.In this work,Ti_(0.85)Zr_(0.17)(Cr-Mn-V)_(1.3)Fe_(0.7)-based alloys were developed to achieve thermal hydrogen compression at mild operating temperatures of water bath.The results indicate the single C 14-type Laves phase as well as homogeneously distributed elements of all alloys.With increased Mn content in Ti_(0.85)Zr_(0.17)Cr_(1.2-x)Mn_xFe_(0.7)V_(0.1)(x=0,0.1,0.2,0.3)alloys.

关键词： alloys hydrogen Laves

Thermal storage properties of Mg-LaNi using as a solar heat storage material

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Rare Metals 2023年第4期42卷 1363-1370页

作者： Qi Wan li-jun jiang Zhi-Nian li Yang Yang Shu-Mao Wang Xiao-Peng liu Energy Material and Technology Research Institute General Research Institute for Nonferrous MetalsBeijing100088China

The effect of LaNi on thermal storage properties of MgH2 prepared by ball milling under hydrogen atmosphere was investigated.The thermal storage properties,cyclic property and thermal storage mechanism were studied by pres sure-composition-temperature(PC T),X-ray diffraction(XRD)and transmission electron microscopy(TEM).The Van't Hoff curve indicates that the formation enthalpy of Mg-16 wt%LaNi is 74.62 kJ·mol^(-1),which approaches to the theoretical values of MgH2.The isothermal measurement indicates that Mg-16 wt%LaNi can absorb 6.263 wt%H_(2)within 30 min at 390℃for the first absorption,the absorption reaction fraction within2 min is over 90.00%,and the desorption reaction fraction within 2 min is 72.63%,increasing by 55.36%compared with that of Mg.Mg-16 wt%LaNi has better cyclic stability than that of Mg,only decreasing by 0.609 wt%after 80cycles.The enhancement in thermal storage performances of Mg by adding LaNi is mainly ascribed to the formed Mg_(2)NiH_(4),H_(0.3)Mg_(2)Ni and La_(4)H_(12.19)during the cyclic process which act as catalysts and inhibit the growth of Mg.The above results prove that Mg-16 wt%LaNi is suitable for use as a heat storage material.

关键词： Magnesium Thermal storage Thermodynamic property Kinetic property

Thermal storage properties of Mg with synergistic effect of LaNi and TiH_(2)

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Rare Metals 2023年第5期42卷 1743-1751页

作者： Qi Wan li-jun jiang Zhi-Nian li Yang Yang Shu-Mao Wang Xiao-Peng liu Energy Material and Technology Research Institute General Research Institute for Nonferrous MetalsBeijing100088China

The effect of LaNi and Ti on thermal storage properties of MgH_(2)was investigated.The thermal storage performances of Mg are significantly improved by adding LaNi and Ti.The pressure-composition-temperature(PCT)curves indicate that the formation enthalpy for Mg-15 wt%Ti-5 wt%LaNi sample is 73.00 kJ·mol^(-1),which approaches to the theoretical values of pure MgH_(2).The isothermal measurement indicates that,for the Mg-15wt%Ti-5 wt%LaNi,the first absorption reaction fraction within 2 min is 93.77%,increasing by 0.32%,0.24%and0.08%compared with those for Mg,Mg-5 wt%LaNi and Mg-15 wt%Ti,respectively.The first desorption reaction fraction within 2 min is 73.18%,increasing by 55.91%,9.79%and 8.12%compared with those for Mg,Mg-5wt%LaNi and Mg-15 wt%Ti,respectively.Moreover,Mg-15 wt%Ti-5 wt%LaNi has the best cyclic stability in all the samples.The thermal storage performances of Mg by adding both LaNi and Ti are improved mainly ascribed to synergistic effect of in situ formed La_(4)H_(12.19),Mg_(2)NiH_(4),H_(0.3)Mg_(2)Ni and TiH_(2)particles during cyclic process.The above analysis demonstrates that Mg-15 wt%Ti-5wt%LaNi is suitable for using as a heat storage material.

关键词： Thermal storage Magnesium hydride Thermodynamic property Kinetics performances Cyclic stability

Hydrogen storage properties of li-Mg-N-B-H/ZrCoH_(3) composite with different ball-milling atmospheres

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Rare Metals 2023年第3期42卷 1036-1042页

作者： Zhi-Nian li Hao-Chen Qiu Xiu-Mei Guo Jian-Hua Ye Shu-Mao Wang li-jun jiang jun Du Fermin Cuevas Department of Energy Materials and Technology General Research Institute for Nonferrous MetalsBeijing 100088China UMR7182 CMTR/ICMPE/CNRS-UPEC94320 Thiais CedexFrance

li-Mg-N-B-H/ZrCoH_(3) composites were successfully synthesized by ball milling of the reactants under argon and hydrogen atmosphere,respectively.The composite synthesized by reactive ball milling(RBM)under hydrogen has the best hydrogen storage properties.It can desorb 3.71 wt%hydrogen in 60 min at 150℃under pressure of 0.1 MPa,and the dehydrogenation capacity reaches 4.59 wt%in 8 h.For the re-hydrogenation,5.27 wt%hydrogen was absorbed in only 10 min at 150℃under H_(2) pressure of 8 MPa.The phases of the as-milled and subsequently dehydrogenated and re-hydrogenated samples were determined by X-ray diffraction(XRD).The microstructures and elemental distributions were characterized by scanning electron microscope(SEM)and energy-dispersive spectrometer(EDS)measurements.It is shown that Mg is in situ hydrogenated and introduced homogeneous distribution of ZrCoH_(3) particles during the RBM process under hydrogen atmosphere.The activation energies for the composites were calculated by Kissinger method through differential scanning calorimetric(DSC)measurements for the dehydrogenation process with different heating rates.It is determined that the activation energy for the li-Mg-N-B-H/ZrCoH_(3) composite synthesized by RBM under hydrogen is 79.9 kJ·mol^(-1),which is14 kJ·mol^(-1) lower than that for the sample without ZrCoH_(3) addition.The N-H bond energies were analyzed by infrared(IR)absorption spectrum,and the reasons for weakening of the N-H bond were further discussed.

关键词： Hydrogen storage li-Mg-N-B-H Reactive ball milling Activation energy

Preparation of double-shell Si@SnO_(2)@C nanocomposite as anode for lithium-ion batteries by hydrothermal method

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Rare Metals 2023年第9期42卷 2972-2981页

作者： Yu Lei Shuai li Miao Du Jing Mi Dian-Chao Gao Lei Hao li-jun jiang Man Luo Wen-Quan jiang Fan li Shao-Hua Wang National Engineering Research Center of Nonferrous Metals Materials and Products for New EnergyChina GRINM Group Co.Ltd.Beijing100088China GRINM(Guangdong)Institute for Advanced Materials and Technology Foshan528000China Beijing Key Laboratory for Catalysis and Separation Department of Chemical EngineeringBeijing University of TechnologyBeijing100124China

Silicon is one of the most promising anode materials for lithium-ion batteries(liBs), but it suffers from pulverization and hence poor cycling stability due to the large volume variation during lithiation/delithiation. The core-shell structure is considered as an effective strategy to solve the expansion problem of silicon-based anodes. In this paper, the double-shell structured Si@SnO_(2) @C nanocomposite with nano-silicon as the core and SnO_(2) , C as the shells is synthesized by a facile hydrothermal method.Structural characterization shows that Si@SnO_(2) @C nanocomposite is composed of crystalline Si, crystalline SnO_(2) and amorphous C, and the contents of them are 42.1wt%, 37.8 wt% and 20.1 wt%, respectively. Transmission electron microscope(TEM) observations confirm the double-shell structure of Si@SnO_(2) @C nanocomposite, and the thicknesses of the SnO_(2) and C layers are 20 and 7 nm. The Si@SnO_(2) @C electrode exhibits a high initial discharge capacity of 2777 mAh·g^(-1)at 100 mA·g^(-1)and an excellent rate capability of 340 mAh·g^(-1)at 1500 mA·g^(-1). The outstanding capacity retention is 50.2% after 300 cycles over a potential of 0.01 to 2.00 V(vs. li/li+) at 500 mA·g^(-1). The resistance of solid electrolyte interphase(SEI) film(Rf) and charge transfer resistance(Rct) of Si@SnO_(2) @C are 7.68and 0.82 Ω, which are relatively smaller than those of Si@C(21.64 and 2.62 Ω). It is obviously seen that the SnO_(2) shell can reduce the charge transfer resistance, leading to high ion and electron transport efficiency in the Si@SnO_(2) @C electrode. The incorporation of SnO_(2) shell is attributed to the enhanced rate capability and cycling performance of Si@SnO_(2) @C nanocomposite.

关键词： lithium-ion batteries(liBs) Silicon Doubleshell structure Nanocomposite Hydrothermal method

Hydrogenation properties of(V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce BCC solid solution alloys with M=Cr,Mo,Al

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Rare Metals 2023年第1期42卷 313-319页

作者： Yuan-Fang Wu li-jun jiang Wang Zhao Xiu-Mei Guo Xu-Shan Zhao Zhi-Nian li Xiao-Peng liu Shu-Mao Wang Institute of Energy Materials and Technology General Research Institute for Nonferrous MetalsBeijing100088China

The structure and hydrogenation properties of (V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce(x=0,1,3,5;at%) alloys with M=Cr,Mo,Al were investigated.All the alloys show the same phase composition consisting of BCC matric and CeO_(2)phases which distribute along the grain boundary.The hydrogen capacities of (V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce change little with M,and none of them exceeds 2.0 wt%.But the plateau pressure shows remarkable linearly variation with the amount of M and the lattice parameter of BCC matric.The additions of Cr,Mo and A1 raise the plateau,but the linear relation of plateau versus BCC lattice parameter of Mo/Al-added alloys is opposite to that of Cr-added alloys and many other conventional hydrogen storage alloys.The radius of hydrogen site is introduced to explain the inconsistent.The plateau pressure of (V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce with any kind of M added increases with the contraction of the hydrogen site.The plateau pressure of (V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce can also be reflected by the stability of hydride which is judged by the enthalpy change during the dehydrogenation.

关键词： V-Fe alloy Hydride decomposition enthalpy Plateau pressure Hydrogen site Stability of hydride

数字经济发展如何促进中国城市制造业出口升级?——基于中介效应模型与空间杜宾模型的实证分析

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经济体制改革 2024年第2期 184-192页

作者：朱洁西李俊江吉林大学经济学院吉林长春130012

基于2011~2020年中国282个城市的面板数据,实证检验数字经济发展对城市制造业出口升级的影响,并分析其中介机制和空间溢出效应。结果表明:数字经济发展不仅能有效促进城市制造业出口升级,而且对邻近城市的制造业出口升级产生了正向空间... 详细信息

基于2011~2020年中国282个城市的面板数据,实证检验数字经济发展对城市制造业出口升级的影响,并分析其中介机制和空间溢出效应。结果表明:数字经济发展不仅能有效促进城市制造业出口升级,而且对邻近城市的制造业出口升级产生了正向空间溢出效应;技术创新和产业结构升级是数字经济驱动城市制造业出口升级的重要中介渠道;在东部城市、大城市和中心城市,数字经济对制造业出口升级的积极作用更明显。鉴于此,应加快数据要素市场培育和数字产业集群建设,发挥数字经济的辐射带动作用,加快关键技术的创新突破,促进产业结构高级化与合理化,以更好地推动制造业向全球价值链的中高端攀升。

关键词：数字经济制造业出口升级中介效应模型空间杜宾模型

Resatorvid protects against hypoxic-ischemic brain damage in neonatal rats

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Neural Regeneration Research 2020年第7期15卷 1316-1325页

作者： li-jun jiang Zhen-Xing Xu Ming-Fu Wu Gai-Qin Dong li-li Zhang jun-Yan Gao Chen-Xi Feng Xing Feng Department of Neonatology Children's Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina Department of Neonatology Affiliated Hospital of Yangzhou UniversityYangzhouJiangsu ProvinceChina

Secondary brain damage caused by hyperactivation of autophagy and inflammatory responses in neurons plays an important role in hypoxic-ischemic brain damage(HIBD).Although previous studies have implicated Toll-like receptor 4(TLR4)and nuclear factor kappa-B(NF-κB)in the neuroinflammatory response elicited by brain injury,the role and mechanisms of the TLR4-mediated autophagy signaling pathway in neonatal HIBD are still unclear.We hypothesized that this pathway can regulate brain damage by modulating neuron autophagy and neuroinflammation in neonatal rats with HIBD.Hence,we established a neonatal HIBD rat model using the Rice-Vannucci method,and injected 0.75,1.5,or 3 mg/kg of the TLR4 inhibitor resatorvid(TAK-242)30 minutes after hypoxic ischemia.Our results indicate that administering TAK-242 to neonatal rats after HIBD could significantly reduce the infarct volume and the extent of cerebral edema,alleviate neuronal damage and neurobehavioral impairment,and decrease the expression levels of TLR4,phospho-NF-κB p65,Beclin-1,microtubule-associated protein l light chain 3,tumor necrosis factor-α,and interleukin-1βin the hippocampus.Thus,TAK-242 appears to exert a neuroprotective effect after HIBD by inhibiting activation of autophagy and the release of inflammatory cytokines via inhibition of the TLR4/NF-κB signaling pathway.This study was approved by the Laboratory Animal Ethics Committee of Affiliated Hospital of Yangzhou University,China(approval No.20180114-15)on January 14,2018.

关键词： autophagy hypoxic-ischemic brain damage neonatal hypoxic-ischemic brain damage neuroinflammation nuclear factor kappa-B resatorvid TAK-242 Toll-like receptor 4