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Recent progress of in-situ characterization of LiNi_(1−x−y)Co_(x)Mn_(y)O_(2) cathodes for lithium metal batteries: A mini review

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Nano Research 2024年第3期17卷 1384-1401页

作者： Huanzhu Lv xiaoqi Zhu Jun Mei yuanhua xia Bin Wang Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 611731China Chengdu Development Center of Science and Technology China Academy of Engineering PhysicsChengdu 610200China Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics(CAEP)Mianyang 621999China

In the context of the gradual popularity of electric vehicles(EVs),the development of lithium battery systems with high energy density and power density is regarded as the foremost way to improve the range of ***_(1-x-y)Co_(x)Mn_(y)O_(2)(NCM)cathodes have been the focus of researchers due to their high energy density,excellent power performance,and low-temperature ***,the elaboration of the decay mechanism of NCM cathode based on lithium metal batteries(LMBs)is still being restricted to the primary *** the past decades,the development and application of advanced in-situ characterization tools have facilitated researchers'understanding of the internal operation mechanism of batteries during charging and *** this minireview,the latest progress of in-situ observation of the NCM cathode by X-ray diffraction(XRD),fourier transform infrared(FT-IR)spectroscopy,Raman spectroscopy,atomic force microscopy(AFM),transmission electron microscope(TEM),optical microscope,and other characterization tools is *** mechanisms of structural degradation,cathode-electrolyte interfaces(CEIs)composition,and dynamic changes of NCM,electrolyte breakdown,and gas production are ***,based on the existing research progress,the opportunities and challenges for future in-situ characterization technology in the study of the mechanism of LMBs are discussed in ***,the purpose of this minireview is to summarize recent work that focuses on the outstanding application of in-situ characterization techniques in the mechanistic study of LMBs,and pointing the way to the future development of high energy density and power density LMBs systems.

关键词： lithium metal batteries(LMBs) In-situ characterization LiNi_(1-x-y)Co_(x)Mn_(y)O_(2)(NCM)

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A neutron diffraction investigation of high valent doped barium ferrite with wideband tunable microwave absorption

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Journal of Advanced Ceramics 2022年第2期11卷 263-272页

作者： Jun LI Yang HONG San HE Weike LI Han BAI yuanhua xia Guangai SUN Zhongxiang ZHOU School of Physics Harbin Institute of TechnologyHarbin 150001China Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology Harbin Institute of TechnologyHarbin 150001China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory for Neutron Physics of CAEP Institute of Nuclear Physics and ChemistryMianyang 621999China

The barium ferrite BaTi_(x)Fe_(12−x)O_(19)(x=0.2,0.4,0.6,0.8)(BFTO-x)ceramics doped by Ti4+were synthesized by a modified sol–gel *** crystal structure and magnetic structure of the samples were determined by neutron diffraction,and confirm that the BFTO-x ceramics were high quality single phase with sheet *** x increasing from 0.2 to 0.8,the saturation magnetization(M_(s))decreases gradually but the change trend of coercivity(H_(c))is complex under the synergy of the changed grain size and the magnetic crystal anisotropy *** on the high valence of Ti^(4+),double resonance peaks are obtained in the curves of the imaginary part of magnetic conductivity(μ′′)and the resonance peaks could move toward the low frequency with the increase of x,which facilitate the samples perform an excellent wideband modulation microwave absorption *** the x=0.2 sample,the maximum reflection loss(RL)can reach−44.9 dB at the thickness of only 1.8 mm,and the bandwidth could reach 5.28 GHz at 2 mm when RL is less than−10 *** the BFTO-x ceramics show excellent frequency modulation ability varying from 18(x=0.8)to 4 GHz(x=0.4),which covers 81%of the investigated frequency in microwave absorption *** work not only implements the tunable of electromagnetic parameters but also broadens the application of high-performance microwave absorption devices.

关键词： barium ferrite neutron diffraction microwave absorption

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Manipulating non-collinear antiferromagnetic order and thermal expansion behaviors in triangular lattice Mn_(3)Ag_(1-x)Sn(Ge)_(x)N

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Journal of Materiomics 2024年第2期10卷 456-462页

作者： Dongmei Hu Sihao Deng Ying Sun Kewen Shi Xiuliang Yuan Shihai An Lunhua He Jie Chen yuanhua xia Cong Wang School of Physics Beihang UniversityBeijing100191China School of Integrated Circuit Science and Engineering Beihang UniversityBeijing100191China National Key Lab of Spintronics Institute of International InnovationBeihang UniversityYuhang DistrictHangzhou311115China Spallation Neutron Source Science Center Dongguan523803China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China Institute of Physics Chinese Academy of SciencesBeijing100190China Songshan Lake Materials Laboratory Dongguan523808China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang621999China

Magnetic materials with non-collinear spin orderings provide an outstanding platform to probe spin-tronic phenomena owing to their strong spin-orbit coupling(SOC)and unique Berry *** is thus important to obtain a non-collinear antiferromagnetic(AFM)phase at room temperature(RT).Signifi-cantly,the discovery of novel materials with nearly zero thermal expansion(ZTE)property near RT is required and pursued for avoiding thermal stress and fracture in spintronic ***,the doping of Sn(Ge)at the Ag site in the triangular lattice Mn_(3)Ag_(1-x)Sn(Ge)_(x)N compounds increases effectively the Neel point and makes the interesting non-collinearГ^(5g)AFM phase exist above *** magnetic phase diagrams withГ^(5g)phase up to 498 K were built by the combined analysis of neutron powder diffraction(NPD),magnetic measurements,electronic transport,and differential scanning calorimetry(DSC).The thermal expansion behaviors of Mn_(3)Ag_(1-x)Sn(Ge)_(x)N were modulated,and the nearly ZTE above RT was achieved in Mn_(3)Ag_(0.5)Ge_(0.5)N withinГ^(5g)AFM *** findings offer an effective way to tailor the non-collinear AFM ordering and correlated thermal expansion behavior for potential use in the emerging field of thermal stress-free magnetic chip materials.

关键词： Non-collinear magnet Antiferromagnetic spintronics Nearly zero thermal expansion Neutron powder diffraction Antiperovskite

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Mn-based permanent magnets

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Chinese Physics B 2018年第11期27卷 55-70页

作者： Jinbo Yang Wenyun Yang Zhuyin Shao Dong Liang Hui Zhao yuanhua xia Yunbo Yang State Key Laboratory for Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Beijing Key Laboratory for Magnetoelectric Materials and Devices Beijing 100871China Institutes of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621999China

Mn-based intermetallic compounds have attracted much attention due to their fascinating structural and physical properties,especially their interesting hard magnetic *** this paper,we have summarized the magnetic and structural properties of Mn-based intermetallic compounds(Mn X,where X=Al,Bi,and Ga).Various methods for synthesizing single phases of MnAl,MnBi,and Mnx Ga were developed in our lab.A very high saturation magnetization of 125 emu/g,coercivity of 5 kOe,and maximum energy product(BH)_(max)of 3.1 MG·Oe were achieved at room temperature for the pureτ-Mn–Al magnetic phase without carbon doping and the extrusion *** temperature phase(LTP)MnBi with a purity above 95 wt.%can be *** abnormal temperature coefficient of the coercivity was observed for the LTP MnBi *** coercivity increased with temperature from 100 K to 540 K,reached a maximum of 2.5 T at about540 K,and then decreased slowly to 1.8 T at 610 *** positive temperature coefficient of the coercivity is related to the evolution of the structure and magnetocrystalline anisotropy field of the LTP MnBi phase with *** LTP MnBi bonded magnets show maximum energy products(BH)_(max)of 8.9 MG·Oe(70 kJ/m^(3))and 5.0 MG·Oe(40 k J/m^(3))at room temperature and 400 K,*** Mn_(x)Ga phases with L10 structures(x〈2.0)and D0_(22)structures(x〉2.0)were *** of the above structures can be described by a D0_(22)supercell model in which 2 a-Ga and 2 b-Mn are simultaneously *** tetragonal D0_(22)phases of the Mn_(x)Ga show high coercivities ranging from 7.2 kOe for low Mn content x=1.8 to 18.2 kOe for high Mn content x=3 at room *** Mn_(1.2)Ga sample exhibits a room temperature magnetization value of 80 emu/*** hard magnetic properties of coercivityiH_(c)=3.5 kOe,remanence M_(r)=43.6 emu/g,and(BH)_(max)=2.5 MG·Oe were obtained at room *** on the above studies,we believe that Mn-based magnetic materials could

关键词： permanent magnetic materials magnetic properties manganese alloys magnetic structure coercivity magnetization neutron diffraction

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Oxygen vacancy migration and its lattice structural origin in A-site non-stoichiometric bismuth sodium titanate perovskites

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Journal of Materiomics 2022年第3期8卷 719-729页

作者： Jing Shi xiao Liu Fangyuan Zhu Wenchao Tian yuanhua xia Tangyuan Li Rongrong Rao Tao Zhang Laijun Liu Key Laboratory of Electronic Equipment Structure Design(MOE) School of Mechano-Electronic EngineeringXidian UniversityXi'an710071China School of Materials Science and Engineering Xi'an University of Science and TechnologyXi'an710054China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201204China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang621900China Frontier Institute of Science and Technology Xi'an Jiaotong UniversityXi'an710049China College of Science Xi'an University of Science and TechnologyXi'an710054China Key Laboratory of Nonferrous Materials and New Processing Technology(MOE) College of Materials Science and EngineeringGuilin University of TechnologyGuilin541004China

Off-stoichiometry of perovskite structural Bi0.5Na0.5TiO3(BNT)ferroelectrics can give rise to considerable oxide-ion *** inherent structural characteristics are urgent to be resolved due to its particular sensitivity of the conduction mechanism to the nominal composition and synthesis ***,a thorough study of the temperature-dependent neutron,X-ray diffraction and Raman spectrum is carried out on a series of equivalently substituted A-site deficient non-stoichiometric and pristine *** transition and defect association are systemically investigated in these dominated rhombohedral phases at room temperature,associated with well saturated ferroelectric *** structural evolution identified by Rietveld refinements and the origin of the electrical performance are clarified at elevated temperatures,focusing on the subtle distortions of ionic displacements,oxygen octahedral tilts and local chemical environments for oxygen *** ion migration ability mediated by oxygen vacancies that are not energetically favorable in BNT mainly depends on the external substitutional disorder,and is strongly affected by the dopant *** with the lone pair substitution concept,superior oxide ionic conductivity is achieved,and an alternative strategy is provided in designing BNT based oxide ion conductors.

关键词： Ferroelectrics Bismuth sodium titanate Oxide ion conductors Neutron powder diffraction Oxygen vacancy

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Experimental investigation and thermodynamic modeling of the U-Nb system

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Journal of Materials Science & Technology 2021年第22期81卷 229-235页

作者： Chuan Mo Wenlin Mo Peng Zhou BaiXue Bian Yong Du Tao Fa Pengguo Zhang Ruiwen Li Yanzhi Zhang Changsheng Zhang yuanhua xia xiaolin Wang Institute of Materials China Academy of Engineering PhysicsJiangyou 621907China Hunan Provincial Key Defense Laboratory of High Temperature Wear-Resisting Materials and Preparation Technology Hunan University of Science and TechnologyXiangtan 411201China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Key Laboratory for Neutron Physics of Chinese Academy of Engineering Physics Institute of Nuclear Physics and ChemistryMianyang 621999China China Academy of Engineering Physics Mianyang 621900China

The phase equilibria and thermodynamic properties of the U-Nb system were investigated through experiments and thermodynamic *** the experiments,a series of samples with different content of Nb were prepared by arc *** Nb content covers the entire composition range of the U-Nb binary *** solidification,the samples were annealed and then analyzed by X-ray diffraction,scanning electron microscopy,energy dispersive X-ray spectroscopy,differential scanning calorimeter and neutron *** equilibrium phases,including γ1(U-rich bcc),αU,and γ2(U-depleted bcc),were determined in detail from the experimental *** occurrence of the invariant reaction γ1→αU+γ2 was confirmed,and the reaction temperature and composition were accurately ***,the experimental findings clarify the dispute between the Dwight and Terekhov theories regarding the phase region(i.e.,whether the phase region is αU+γ1 or βU+γ2).Furthermore,the U-Nb phase diagram was reassessed by incorporating the present experimental data and previously published reliable experimental data from the literature.A set of self-consistent thermodynamic parameters were developed using CALPHAD(Calculation of phase diagrams),and the calculations reasonably agree with the experimental observations.

关键词： U-Nb alloy Monotectoid reaction Phase diagram Thermodynamic Modeling

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Effects of deuteration on the structure of NH_4H_2PO_4 crystals characterized by neutron diffraction

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Chinese Physics B 2019年第1期28卷 484-489页

作者： Baoan Liu Lili Zhu Fafu Liu Xun Sun Xiping Chen Lei Xie yuanhua xia Guangai Sun Xin Ju Department of Physics University of Science and Technology Beijing School of Materials Science and Engineering Shandong Jiaotong University State Key Laboratory of Crystal Materials Shandong University Neutron Physics Laboratory China Academy of Engineering Physics

A series of deuterated ammonium dihydrogen phosphate(DADP) crystals were grown and their structures were investigated by using powder neutron diffraction method. In the entire composition range, the deuterated level in the crystals is lower compared with the aqueous growth solution. The deuterium segregation coefficient in the crystals decreases with increasing deuterium content of the solution. The deuterium content in the NH_4^+ group is higher than that in H_2PO_4^- *** addition, the variations of lattice parameters are shown here.

关键词： DADP crystal neutron diffraction deuteration level

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Pressure-induced disordering of site occupation in iron–nickel nitrides

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Matter and Radiation at Extremes 2021年第3期6卷 55-63页

作者： Binbin Wu Li Lei Feng Zhang Qiqi Tang Shan Liu Meifang Pu Duanwei He yuanhua xia Leiming Fang Hiroaki Ohfuji Tetsuo Irifune Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065China Institute of Nuclear Physics and Chemistry Academy of Engineering PhysicsMianyang 621900China Geodynamics Research Center Ehime UniversityMatsuyama 790-8577Japan

Controlled disordering of substitutional and interstitial site occupation at high pressure can lead to important changes in the structural and physical properties of iron–nickel *** important progress that has been achieved,structural characterization of ternary Fe–Ni–N compounds remains an open problem owing to the considerable technical challenges faced by current synthetic and structural approaches for fabrication of bulk ternary ***,iron–nickel nitride samples are synthesized as spherical-like bulk materials through a novel highpressure solid-state metathesis *** employing a wide array of techniques,namely,neutron powder diffraction,Rietveld refinement methods combined with synchrotron radiation angle-dispersive x-ray diffraction,scanning electron microscopy/energy dispersive x-ray spectroscopy,and transmission electron microscopy,we demonstrate that high-temperature and high-pressure confinement conditions favor substitutional and interstitial site disordering in ternary iron–nickel *** addition,the effects of interstitial nitrogen atoms and disorderly substituted nickel atoms on the elastic properties of the materials are discussed.

关键词： disordering nickel ternary

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膜萃取处理高浓度含苯胺废水

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化工进展 2007年第5期26卷 715-719页

作者：吴丽丽周集体张爱丽夏元化肖敏大连理工大学环境与生命学院大连116023

实验采用橡胶膜作为分离膜处理高浓度含苯胺废水。考察了废水初始浓度、水力条件、操作温度、萃取液pH值及离子强度等因素对苯胺去除效果及总传质系数的影响及该工艺对大连绿源药业公司工业废水处理的效果。实验发现该传质过程主要受膜... 详细信息

实验采用橡胶膜作为分离膜处理高浓度含苯胺废水。考察了废水初始浓度、水力条件、操作温度、萃取液pH值及离子强度等因素对苯胺去除效果及总传质系数的影响及该工艺对大连绿源药业公司工业废水处理的效果。实验发现该传质过程主要受膜阻控制;渗透系数与温度之间符合范霍夫–阿伦尼乌斯方程;离子强度改变了苯胺在相间的分配系数,影响传质过程;在流速3.05L/d、温度50℃、pH值约等于1、膜管长18m条件下,实际工业苯胺废水进水浓度为33081mg/L时,苯胺的去除率基本维持在97%以上,单位废水净收益为103.84元/吨。

关键词：膜萃取苯胺硅橡胶膜传质

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退火处理对新型无镁Y0.7La0.3Ni3.25Al0.1Mn0.15储氢合金结构和电化学性能的影响

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高等学校化学学报 2020年第1期41卷 145-154页

作者：邓安强罗永春夏元华彭思慧马伟旗赵旭东杨洋侯晓东兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室兰州730050 兰州理工大学材料科学与工程学院兰州730050 宁夏大学机械工程学院银川750021 中国工程物理研究院核物理与化学研究所绵阳621999

通过电弧熔炼制备了无镁La⁃Y⁃Ni系A2B7型Y0.7La0.3Ni3.25Al0.1 Mn0.15合金,并在高纯0.2 MPa Ar气氛下分别对合金进行850~1050℃真空24h退火热处理.通过X射线衍射(XRD)、中子衍射(ND)、扫描电子显微镜/能量分散谱(SEM/EDS)和电化学测试... 详细信息

通过电弧熔炼制备了无镁La⁃Y⁃Ni系A2B7型Y0.7La0.3Ni3.25Al0.1 Mn0.15合金,并在高纯0.2 MPa Ar气氛下分别对合金进行850~1050℃真空24h退火热处理.通过X射线衍射(XRD)、中子衍射(ND)、扫描电子显微镜/能量分散谱(SEM/EDS)和电化学测试方法研究了退火温度对合金结构和性能的影响.结构分析表明,铸态合金由CaCu5,Ce5Co19,Gd2Co7,Ce2Ni7多相构成,随着退火温度升高,CaCu5,Ce5Co19,Gd2Co7相逐步减少直至消失,Ce2Ni7主相相丰度逐步增加.900~950℃退火时,合金为单相Ce2Ni7结构.退火温度继续升高,合金中出现少量PuNi3相.合金电极的最大放电容量随着退火温度的升高先增加后降低.从铸态的307.6 mA·h/g增加到900℃退火时的最大值393.1 mA·h/g,后又降到1050℃退火时的366.4 mA·h/g.合金电极的电化学循环稳定性随退火温度的升高而升高,循环100次后电化学容量保持率(S100)从铸态的66%上升到1050℃退火后的88.5%,900~950℃退火时,合金电极具有较好的综合电化学性能.

关键词：退火处理储氢合金结构电化学性能

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