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金属学报 2024年第6期60卷 826-836页

作者：李聪王猛屠汉俊施立群复旦大学现代物理研究所上海200433

合金化方法通常被用于改善储氢金属的力学性能,然而这往往会影响材料的储氢性能。为了研究Y掺杂对金属Ti吸放氢的影响,本工作从实验和模拟2方面研究了Ni/Ti-Y合金薄膜的吸放氢特性。采用直流磁控溅射方法制备不同Y掺杂含量的Ti-Y薄膜,... 详细信息

合金化方法通常被用于改善储氢金属的力学性能,然而这往往会影响材料的储氢性能。为了研究Y掺杂对金属Ti吸放氢的影响,本工作从实验和模拟2方面研究了Ni/Ti-Y合金薄膜的吸放氢特性。采用直流磁控溅射方法制备不同Y掺杂含量的Ti-Y薄膜,并在表面镀一层Ni膜以减少表面污染。吸氘实验发现,Ti薄膜中氘(D)含量随着Y浓度的增加而增大,这是因为替位Y能够结合更多的D,且Y易与O结合可降低Ti被毒化的程度,有利于Ti吸D。密度泛函理论计算表明Y增强了与其相邻的Ti—H键能,同时产生了较强的Y—H键,导致紧邻Y的H结合能和扩散势垒增大,Ti-Y对H的束缚力增强;氘热释放实验结果显示Ni/Ti-Y体系的D解吸表观活化能高于纯Ni/Ti,说明Y对Ni/Ti-Y体系的氘脱附动力学产生了重要影响。结果表明Y掺杂对Ti薄膜体系的吸放氢性能都产生了一定程度的影响。

关键词：磁控溅射离子束分析密度泛函理论扩散表观活化能

Unveiling and Alleviating Chemical“Crosstalk”of Succinonitrile Molecules in Hierarchical Electrolyte for High-Voltage Solid-State Lithium Metal Batteries

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Energy & Environmental Materials 2023年第3期6卷 107-116页

作者： Fang Fu Ying Liu Chen Sun Lina cong Yulong Liu liqun Sun Haiming Xie National&Local United Engineering Laboratory for Power Battery Department of ChemistryNortheast Normal UniversityChangchun 130024China

Succinonitrile-based plastic crystal electrolytes have emerged for high-energy-density Li metal batteries in terms of their superior ambient ionic conductivity,low flammability,and benign compatibility with high voltage cathode,but are hampered by inherent instabilities toward Li *** hierarchical solid electrolytes structure is a fundamental approach to protect Li anode from succinonitrile attacks,with succinonitrile-based oxidation-resistance layer facing high voltage cathode and reduction-tolerant layer contacting Li ***,free succinonitrile molecules in succinonitrile-based electrolyte layer can diffuse across the electrolyte/electrolyte interface and further reach Li anode surface during the battery *** chemical“crosstalk”cause reduction-tolerant electrolyte layer to fail to protect the Li anode from the attacks of free succinonitrile *** Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)is introduced creatively into succinonitrile-based electrolyte *** taking advantage of the complexation between La atoms in Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)and N atoms in succinonitrile,the free succinonitrile molecules are successfully immobilized in succinonitrile-based electrolyte *** resulting low resistance and highly durable solid electrolyte interphase and cathode electrolyte interphase endow NCM622||Li batteries with remarkable cycle *** research provides a new idea for the real application of plastic crystal electrolytes in high voltage solid-state lithium metal batteries.

关键词： hierarchical solid electrolytes high voltage interface lithium metal plastic crystal

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某工业园区表层土壤稀土元素地球化学特征

环境化学 2024年第8期43卷 2695-2703页

作者：查春雷袁二军史立群彭红明丛殿阁徐建东屈宏飞青海大学地质工程学院西宁810016 青海省环境地质勘查局/青海省地质环境保护与地灾害防治工程技术研究中心西宁810001 青海九零六工程勘察设计院有限责任公司西宁810001 青海大学省部共建三江源生态与高原农牧业国家重点实验室西宁810016

为探究某工业园区表层土壤中稀土元素的地球化学特征,了解其物质来源及影响因素,采集工业园区周边表层土壤样品,分析稀土元素的含量及空间分布特征,研究稀土元素的配分模式及特征参数,并探讨稀土元素的影响因素.结果表明:稀土元素总含量... 详细信息

为探究某工业园区表层土壤中稀土元素的地球化学特征,了解其物质来源及影响因素,采集工业园区周边表层土壤样品,分析稀土元素的含量及空间分布特征,研究稀土元素的配分模式及特征参数,并探讨稀土元素的影响因素.结果表明:稀土元素总含量(WREE)范围为52.38—155.78 mg·kg^(−1),平均值105.02 mg·kg^(−1),空间分布特征显示稀土元素含量大体上呈现出南高北低的特征;球粒陨石标准化曲线表现为向右倾斜,轻稀土元素富集,重稀土元素亏损;δCe范围为1.00—1.09,平均值1.04,存在轻微的正异常;δEu范围为0.65—0.76,平均值0.71,存在一定的负异常;(La/Yb)N范围为5.96—10.01,平均值7.86,轻重稀土元素之间存在显著的分异现象;(La/Sm)N范围为2.98—4.24,平均值3.42,(Gd/Yb)N范围为1.41—1.92,平均值1.65,轻稀土元素存在明显的分馏,重稀土元素分馏程度较低;研究区的成土母质是影响土壤稀土元素含量的主要因素,化学风化活动和矿物导致了轻重稀土元素的分异,人类活动影响了研究区土壤中稀土元素的空间分布,表明土壤中稀土元素主要来自于自然因素,但后期人类活动也会使其在空间上产生分异.

关键词：工业园区土壤稀土元素空间分布影响因素.

维普期刊数据库博看期刊

High-performance PVDF-HFP based gel polymer electrolyte with a safe solvent in Li metal polymer battery

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Journal of Energy Chemistry 2020年第10期29卷 80-88页

作者： Jing Jie Yulong Liu Lina cong Bohao Zhang Wei Lu Xinming Zhang Jun Liu Haiming Xie liqun Sun National&Local United Engineering Laboratory for Power Battery Department of ChemistryNortheast Normal UniversityChangchun 130024JilinChina Department of Materials Science and Engineering University of CaliforniaDavis 95616CAUnited States

Poly(vinylidenefluoride-co-hexafluoropropylene)(PVDF-HFP)based gel polymer electrolytes are widely studied owing to their electrochemical stability and high dielectric ***,most gel polymer electrolytes show unsatisfied safety and interface compatibility due to excessive absorption of volatile and flammable liquid ***,by using a safe solvent(N-methyl-2-pyrrolidone)with higher boiling(203℃)and flash points(95℃),we initiatively fabricate a flexible PVDF-HFP based gel polymer *** obtained gel polymer electrolyte demonstrates a high ionic conductivity of 7.24×10^−4 S cm−1,an electrochemical window of 5.2 V,and a high lithium transference number of *** a result,the synthesized polymer electrolyte exhibits a capacity retention of 70%after 500 cycles at 0.5 C,and a discharge capacity of 86 mAh g−1 even at a high current rate of 10 C for LiFePO4 based Li metal ***,a stable Li plating/stripping for more than 500 h is achieved under 0.1 mAh at both room temperature and 70℃.Our results indicate that the PVDF-HFP polymer electrolyte is promising for manufacturing safe and high-performance Li metal polymer batteries.

关键词： Gel polymer electrolyte N-methyl-2-pyrrolidone Interface stability Li-ion conduction path

Synthesis,microstructure,and formation mechanism of a potential neutron shielding material:WAlB

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Journal of Materials Science & Technology 2022年第31期126卷 127-131页

作者： Dongya Zhang Peter Richardson Meng Wang Hanjun Tu cong Li Linping He Haibin Zhang liqun Shi Applied Ion Beam Physics Laboratory Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Engineering The University of NewcastleUniversity DriveCallaghanNSW2308Australia Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China

The recent re-discovery of nano-laminated,ternary transition metal borides called‘MAB’phases(M=transition metal,A=Al,and B=B)has allowed for an alternative candidate material for certain high-performance applications[1,2].The discovery of de-sirable MAB phase properties including near-room temperature magnetocaloric effects of Fe 2 AlB 2[3],high-temperature oxidation resistance of MoAlB[4],and single-layer 2D molybdenum boride sheets obtained through the chemical exfoliation of laminated compounds has resulted in an increase in research into their syn-thesis and properties[5].

关键词： microstructure resistance laminated

Passivating buried interface with multifunctional novel ionic liquid containing simultaneously fluorinated anion and cation yielding stable perovskite solar cells over 23% efficiency

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Journal of Energy Chemistry 2022年第6期31卷 659-666,I0018页

作者： Deyu Gao liqun Yang Xiaohui Ma Xueni Shang Chen Wang Mengjia Li Xinmeng Zhuang Boxue Zhang Hongwei Song Jiangzhao Chen cong Chen School of Material Science and Engineering State Key Laboratory of Reliability and Intelligence of Electrical EquipmentHebei University of TechnologyTianjin 300130China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012JilinChina Chimie ParisTech PSL Research UniversityCNRSInstitut de Recherche de Chimie Paris(IRCP)UMR824711 rue P.et M.CurieF-75005 ParisFrance Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China

Interfacial defects and energy barrier would result in serious interfacial non-radiative recombination *** addition,the quality of perovskite films is highly dependent on deposition ***,there is an urgent desire to develop multifunctional interface modulators to manage the interface between electron transport layer and perovskite ***,we report a multifunctional buried interface modulation strategy that 4-fluoro-phenylammonium tetrafluoroborate (FBABF_(4)) consisting of simultaneously fluorinated anion and cation is inserted between SnO_(2)layer and perovskite *** is uncovered by time-of-flight secondary ion mass spectroscopy that the anion and cation in modifier are mainly located at this interface,which is put down to coordination bond of the fluorine atom on BF_(4)^(-) with SnO_(2),and the hydrogen bond of the fluorine atom on FBA^(+) with *** suggests that simultaneous fluorination of anion and cation in the ionic liquid molecule is of crucial importance to ameliorate interfacial contact through chemical *** interface modification approach enables the realization of interfacial defect passivation,interfacial energy band alignment modulation,and perovskite crystallization manipulation,which are translated into enhanced efficiency and stability as well as significantly suppressed *** multiple functions of FBABF_(4) endow the modified solar cells excellent photovoltaic performance with an efficiency exceeding 23%along with appealing long-term *** work highlights the critical role of fluorination strategy in engineering multifunctional organic salt modulators for improving interfacial contact.

关键词： Perovskite solar cells Interface engineering Buried interface Ionic liquid Multifunctional

“Polymer-in-ceramic” based poly(ε-caprolactone)/ceramic composite electrolyte for all-solid-state batteries

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Journal of Energy Chemistry 2021年第1期30卷 318-325,I0010页

作者： Bohao Zhang Yulong Liu Jia Liu liqun Sun Lina cong Fang Fu Alain Mauger Christian M.Julien Haiming Xie Xiumei Pan National&Local United Engineering Laboratory for Power Battery Department of ChemistryNortheast Normal UniversityChangchun 130024JilinChina Institut de Minéralogie de Physique des Matériaux et de Cosmochimie(IMPMC)Sorbonne UniversitéCNRS UMR 75904 Place Jussieu75005 ParisFrance

Inspired by the concept of "polymer-in-ceramic",a composite poly(ε-caprolactone)(PCL)/ceramic containing LiTFSI is prepared and investigated as a solid electrolyte for all-solid-state *** composite with the optimum concentration of 45 wt% LiTFSI and 75 wt% Li1.5Al0.5Ge1.5(PO4)3(LAGP,NASICON-type structure) exhibits a high ionic conductivity(σi=0.17 mS cm-1) at 30℃,a transference number of 0.30,and is stable up to 5.0 *** composite electrolyte is a flexible and self-standing ***-state LiFePO4//Li batteries with this composite electrolyte demonstrate excellent cycling stability with high discharge capacity of 157 mA h g-1,high capacity retention of 96% and coulombic efficiency of 98.5% after 130 cycles at 30℃ and 0.1 C *** electrochemical properties are better than other PCL-based allsolid-lithium batteries,and validate the concept of "polymer-in-ceramic" by avoiding the drawback of lower conductivity in prior "polymer-in-ceramic" electrolyte at high concentration of the ceramic.

关键词： All-solid-state electrolyte Polymer-in-ceramic Poly(ε-caprolactone)/LAGP composite High fluorinated SEI layer

氧缺位结构介孔二氧化钛/聚乙烯复合隔膜在锂硫电池中的应用

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高等学校化学学报 2020年第7期41卷 1661-1669页

作者：吴桐丛丽娜孙立群谢海明东北师范大学化学学院动力电池与地方联合工程实验室吉林省锂离子电池材料科技创新中心长春130024

采用两步溶液法合成了一种具有高度氧缺位的黑色介孔二氧化钛,并将其涂覆在隔膜表面作为锂硫电池复合隔膜,研究了其在锂硫电池中的电化学性能.结果表明,氧缺位的黑色介孔二氧化钛材料不仅展现出良好的导电性,还能加强对多硫化物的物理... 详细信息

采用两步溶液法合成了一种具有高度氧缺位的黑色介孔二氧化钛,并将其涂覆在隔膜表面作为锂硫电池复合隔膜,研究了其在锂硫电池中的电化学性能.结果表明,氧缺位的黑色介孔二氧化钛材料不仅展现出良好的导电性,还能加强对多硫化物的物理和化学吸附能力,从而显著提高锂硫电池的放电比容量(0.1C倍率下首次放电比容量为1257 m A·h/g)和循环性能(循环100次后放电比容量为821 m A·h/g).

关键词：锂硫电池复合隔膜二氧化钛多硫化物循环性能

打造数字化协同制造企业——MES未来发展的新方向

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自动化仪表 2010年第10期31卷 1-4页

作者：丛力群毕英杰上海宝信软件股份有限公司上海201900

随着制造企业之间竞争的日趋激烈,新产品推出的快速化、差异化和高品质化,制造过程的透明化、可视化,交货的准时化以及成本的最低化都是决定企业在激烈市场竞争中立足的关键因素。实现竞争的有效手段是利用信息技术来改造传统的企业管... 详细信息

随着制造企业之间竞争的日趋激烈,新产品推出的快速化、差异化和高品质化,制造过程的透明化、可视化,交货的准时化以及成本的最低化都是决定企业在激烈市场竞争中立足的关键因素。实现竞争的有效手段是利用信息技术来改造传统的企业管理模式。通过引入数字化企业的概念,介绍了MES如何在打造数字化协同制造企业中发挥作用,同时就这一制造模式下如何构造MES系统进行了探讨。作为制造企业的核心系统,MES未来的发展方向一定会聚焦在如何帮助企业实现数字化协同制造上。

关键词：协同制造制造管理模型企业服务总线制造执行系统数字化企业