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Layered Ag-graphene films synthesized by Gamma ray irradiation for stable lithium metal ano des in carb on ate-based electrolytes

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Journal of Energy Chemistry 2022年第1期31卷 354-363,I0010页

作者： Jiaxiang Liu Haoshen Ma zhipeng wen Huiyang Li Jin Yang Nanbiao Pei Peng Zhang Jinbao Zhao College of Energy Xiamen UniversityXiamen 361102FujianChina State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsEngineering Research Center of Electrochemical TechnologyMinistry of EducationState-Province Joint Engineering Laboratory of Power SourceTechnology for New Energy VehicleCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina

Lithium metal batteries are considered as high energy density battery systems with very promising prospects and have bee n widely studied.However,The uncon trollable plating/strippi ng behavior,infinite volume change and den drites formation of lithium metal anode restrict the applicati on.The unc on trolled n ucleati on of lithium caused by the non uniform multi-physical field distributions,can lead to the undesirable lithium deposition.Herein,a graphene composite uniformly loaded with Ag nano-particles(Ag NPs)is prepared through a facile Gamma ray irradiation method and assembled into self-supported film with layered structure(Ag-rGO film).Whe n such film is used as a lithium metal an ode host,the uncontrolled deposition is converted into a highly nucleation-induced process.On one hand,the Ag NPs distributed between the in terlayers of graphe ne can preferentially induce lithium nu cleati on and en able uniform deposition morphology of lithium between interlayers.On the other hand,the stable layered graphene structure can accommodate volume change,stabilize the interface between anode and electrolyte and inhibit dendrites formation.Therefore,the layered Ag-rGO film as anode host can reach a high Coulombic efficiency over 93.3% for 200 cycle(786 h)at a current density of 1 mA cm^(-2) for 2 mAh cm^(-2) in carbonate-based electrolyte.This work proposes a facile Gamma ray irradiation method to prepare metal/3D-skeleton structure as lithium anode host and demonstrates the potential to regulate the lithium metal deposition behaviors via manipulating the distribution of lithiophilic metal(e.g.Ag)in 3D frameworks.This may offer a practicable thinking for the subsequent design of the lithium metal anode.

关键词： Lithium metal anode Gamma Ray irradiation Ag nano-particles Inductive effect Layered structure Uniform lithium deposition

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Constructing a uniform lithium iodide layer for stabilizing lithium metal anode

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Journal of Energy Chemistry 2021年第4期30卷 129-135页

作者： Yingxin Lin zhipeng wen Jiaxiang Liu Dongzheng Wu Peng Zhang Jinbao Zhao College of Energy&School of Energy Research Xiamen UniversityXiamen 361102FujianChina State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Centre of Chemistry for Energy MaterialsState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina

The metallic lithium(Li)is the ultimate option in the development of anodes for high-energy secondary batteries.Unfortunately,inferior cycling reversibility and Li dendrites growth of Li metal as anode enormously impede its commercialization.Here,a uniform Li I protective layer is constructed on Li metal anode via a facile and direct solid-gas reaction of Li metal with iodine vapor.The pre-constructed Li I layer possesses more steadily and faster Li ion transport than the conventional SEI layer and contributes to a steady interface for the Li metal anode,which affords a smooth Li deposition morphology without Li dendrites formation.The symmetrical cell with the Li metal anode protected by Li I layer exhibits a longer cycling lifetime of over 700 h at a current density of 1 m A cm^(-2) with Li plating capacity of 1 m Ah cm^(-2).Moreover,the Li I layer protected Li metal anode can still remain high capacity retention of 74.6%after 500 cycles in the full cell paired with NCM523 cathode.The work proposes an easy and effective method to fabricate a uniform and stable protective layer on the Li metal anode and offers a practicable thinking for the commercial implementation of Li metal batteries.

关键词： Li metal anode LiI layer Iodine vapor Electrode/electrolyte interface Li dendrites

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Ag-modified hydrogen titanate nanowire arrays for stable lithium metal anode in a carbonate-based electrolyte

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Journal of Energy Chemistry 2021年第3期30卷 282-290页

作者： zhipeng wen Dongzheng Wu Hang Li Yingxin Lin Hang Li Yang Yang Jinbao Zhao State Key Lab of Physical Chemistry of Solid Surfaces Collaborative fnnovation Centre of Chemistry for Energy MaterialsState-Province JointEngineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistiy of EducationCollege of Chemistiy and Chemical EnginesringXiamen UniversityXiamen 361005FujianChina College of Energy&School of Energy Research Xiamen University Xiamen 361102FujianChina School of Chemical Engineering cmd Light Industry Guangdong University of TechnologyGuangzhou 510006CuangdongChina

In the investigation of the next-generation battery anode,Li metal has attracted increasing attention owing to its ultrahigh specific capacity and low reduction potential.However,its low columbic efficiency,limited cycling life,and serious safety hazards have hindered the practical application of rechargeable Li metal batteries.Although several strategies have been proposed to enhance the electrochemical performance of Li metal anodes,most are centered around ether-based electrolytes,which are volatile and do not provide a sufficiently large voltage window.Therefore,we aimed to attain stable Li deposition/stripping in a commercial carbonate-based electrolyte.Herein,we have successfully synthesized hydrogen titanate(HTO)nanowire arrays decorated with homogenous Ag nanoparticles(NPs)(Ag@HTO)via simple hydrothermal and silver mirror reactions.The 3 D cross-linked array structure with Ag NPs provides preferable nucleation sites for uniform Li deposition,and most importantly,when assembled with the commercial LiNi_(0.5)Co0.2Mn_(0.3)O_(2) cathode material,the Ag@HTO could maintain a capacity retention ratio of 81.2% at 1 C after 200 cycles,however the pristine Ti foil failed to do so after only 60 cycles.Our research therefore reveals a new way of designing current collectors paired with commercial high voltage cathodes that can create high energy density Li metal batteries.

关键词： Hydrogen titanate nanowire arrays Ag nanoparticles Li metal anode Carbonate-based electrolyte

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磷酸锰铁锂正极材料改性研究进展

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储能科学与技术 2024年第3期13卷 770-787页

作者：文志朋潘凯韦毅郭佳文覃善丽蒋雯吴炼廖欢广西产研院新型功能材料研究所有限公司广西南宁530200 广西大学广西石化资源加工及过程强化技术重点实验室广西南宁530004 广东省科学院化工研究所广东广州510665

正极材料是决定锂离子电池性能的关键材料之一,直接影响电池的能量密度、循环寿命、倍率性能及安全性能。橄榄石型LiMnFePO4具有能量密度高、成本低、环境友好、安全稳定等优点,被认为是一种很有前途的锂离子电池正极材料。然而,LiMnFe... 详细信息

正极材料是决定锂离子电池性能的关键材料之一,直接影响电池的能量密度、循环寿命、倍率性能及安全性能。橄榄石型LiMnFePO4具有能量密度高、成本低、环境友好、安全稳定等优点,被认为是一种很有前途的锂离子电池正极材料。然而,LiMnFePO4具有橄榄石结构磷酸盐基化合物电子电导率低、Li+一维扩散速率慢等固有缺陷,严重阻碍了其在高性能锂离子电池中的大规模应用。如何提升LiMnFePO4的导电子/离子性能,是当前需要解决的关键问题。本文全面综述了LiMnFePO4正极材料的结构特征、合成方法及其导电性能提升的研究进展,着重介绍了表面包覆、形貌控制和离子掺杂等方法对提升LiMnFePO4正极材料导电性能的效果及其作用机理,虽然上述三类改性方法均可一定程度地优化材料颗粒间电子/离子传输路径,实现LiMnFePO4正极材料导电性能的提升。但是单独采用这些方法依然难以从根本上解决LiMnFePO4导电性差的问题。为进一步提升LiMnFePO4正极材料的综合性能,本文在总结当前研究进展的基础上,对LiMnFePO4未来的研究思路和发展方向进行了展望。提出了通过杂原子掺杂优质碳材料包覆、短b轴形貌控制以及离子掺杂等方法联合改性的策略。该策略有望进一步提升LiMnFePO4正极材料的导电性能,获得高容量、高倍率、高稳定性的LiMnFePO4正极材料。

关键词：磷酸锰铁锂导电性能表面包覆形貌控制离子掺杂

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A stable artificial protective layer for high capacity dendrite-free lithium metal anode

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Nano Research 2019年第10期12卷 2535-2542页

作者： zhipeng wen Yueying Peng Jianlong Cong Haiming Hua Yingxin Lin Jian Xiong Jing Zeng Jinbao Zhao State Key Lab of Physical Chemistry of Solid Surfaces Collaborative Innovation Centre of Chemistry for Energy MaterialsState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Energy&School cf Energy Research Xiamen UniversityXiamen 361102China

The metallic lithium(Li)is considered as the most promising anode material for high-e nergy batteries.Nevertheless,the uncon trollable growth of Li den drite and un stable electrolyte/electrode in terface still hin der the developme nt of Li-based battery.In this work,a no vel strategy has been proposed to stabilize Li anode by in-situ polymerizing polypyrrole(PPy)layer on Ni foam(PPy@Ni foam)as an artificial protective layer.The PPy protective layer can effectively decrease the contact between Li metal and electrolyte during cycling.In addition,the morphology characterization shows that the PPy layer can help the even Li deposition undemeath the layer,leading to a dendrite-free Li anode.As a result,when deposited 2 mAh-cm-2 Li metal,the PPy@Ni foam can keep stable Coulombic efficiency(99%)during nearly 250 cycles,much better than the pure Ni foam(100 cycles).Even in the case of the Li capacity of 10 mAh-cm-2,the stable cycling performance for 60 cycles can still be achieved.Furthermore,when assembled with LiFePO4 material as the cathode for a full cell,the PPy@Ni foam can keep high capacity retention of 85.5%at 500 cycles.In our work,we provide a simple and effective method to enhanee the electrochemical performances of Li metal-based batteries,and reveal a new avenue to design three-dimensional(3D)metallic curre nt collector for protecting the Li metal ano de.

关键词： high capacity polypyrrole layer Li metal artificial protective layer dendrite-free anode

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Distribution of c-erbB2 Antisense Probe Labeled with Superparamagnetic Iron Oxide Nanoparticles in the Major Organs of Mice on MR Imaging

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Advances in Nanoparticles 2013年第1期2卷 16-20页

作者： zhipeng wen Haiyan Liu Hairong He Shude Tan Ming wen Shaolin Li Department of Radiology The First Affiliated Hospital Chongqing Medical University Chongqing China

Background: The aim of this study was to investigate the distribution of the c-erbB2 antisense probe labeled with superparamagnetic iron oxide nanoparticles in the major organs of mice by MR imaging. Methods: Sixty BALB/c mice were randomly divided into experimental and control groups. MR scans were performed in each mouse of the experimental group at five different time points (10, 30, 60, 180 and 360 min) after injection of the antisense probe. The signal from each major organ (liver, spleen, heart, kidney and muscle tissue) in comparison with the background signal (signal to noise ratio) was determined at each time point as a measure of the distribution of the antisense probe. Six control mice were killed at each of the same time points and the organs immediately removed for determination of their iron content. Results: After injection of the antisense probe, the highest enrichment of the probe was seen in the spleen, reaching a peak at 180 min, followed by the liver, muscle, heart and kidney. Conclusions: MR imaging can visualize the distribution of c-erbB2 antisense probe labeled with superparamagnetic iron oxide nanoparticles in the major organs of mice, and this may provide the basis for further in vivo studies of MR imaging time and dose selection.

关键词： Antisense Oligodeoxynucleotide Superparamagnetic Iron Oxide Mr Imaging Iron Concentration Vivo Distribution

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BIM+虚幻引擎技术在园林景观工程可视化交互设计中的应用研究

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土木建筑工程信息技术 2024年第1期16卷 32-38页

作者：黄宇俊郑慨睿温智鹏尹浩旭王小鹏张煜堃同炎数智科技(重庆)有限公司重庆400050

为了解决园林景观工程中BIM技术在多专业集成难度大、三维模型可视化效果差、景观设计效率低以及场景交互体验感差等应用难题,本文采用BIM+虚幻引擎技术,以深圳市安托山自然艺术公园为例,开展设计阶段在可视化交互的应用研究。运用虚幻... 详细信息

为了解决园林景观工程中BIM技术在多专业集成难度大、三维模型可视化效果差、景观设计效率低以及场景交互体验感差等应用难题,本文采用BIM+虚幻引擎技术,以深圳市安托山自然艺术公园为例,开展设计阶段在可视化交互的应用研究。运用虚幻引擎导入体积和表面积算法,实现三维土方算量可视化交互问题的求解。采用Dynamo+ArcGIS技术获取苗木名称、定位等基本信息,并通过虚幻引擎中的脚本编辑器实现景观信息模型批量创建,集成各专业模型和数据;通过添加视域分析和碰撞检测等可交互蓝图模块,完成景观与常规专业模型的碰撞检测结果的输出和景观敏感点位置的确定。研究表明:通过BIM与虚幻引擎结合技术,改善了场景可视化交互体验,除了能进一步提升景观模型的设计效率和质量,还能起到深化设计的作用,为园林景观项目设计应用提供精细化的指导作用。

关键词：可视化场景交互虚幻引擎碰撞检测视域分析设计效率

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NPS-2143对胶质瘤增殖与迁移能力的影响及机制

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贵州医科大学学报 2024年第2期49卷 157-168页

作者：聂佳丽殷海棠文志鹏郑志昌李明李琴樊兴华赵青青张彦燕杨继红贵州医科大学药学院贵州贵阳550004 贵州医科大学附属医院药学部贵州贵阳550004

目的探究NPS-2143对胶质瘤U87、U251和Hs683细胞增殖与迁移能力的影响及机制。方法将胶质瘤细胞分为3组,不加药物的对照组(Control组)、6μmol/L和8μmol/L NPS-2143处理组,通过细胞增殖实验CCK-8和细胞平板克隆形成实验检测不同浓度N... 详细信息

目的探究NPS-2143对胶质瘤U87、U251和Hs683细胞增殖与迁移能力的影响及机制。方法将胶质瘤细胞分为3组,不加药物的对照组(Control组)、6μmol/L和8μmol/L NPS-2143处理组,通过细胞增殖实验CCK-8和细胞平板克隆形成实验检测不同浓度NPS-2143对U87和U251细胞活力与增殖的影响,通过流式细胞术实验检测不同浓度NPS-2143对细胞周期和凋亡的影响,Western blot检测细胞凋亡相关蛋白(Bax、Caspase 3)和细胞周期相关蛋白(P21、Cyclin D1)的表达水平;通过细胞划痕实验和细胞迁移实验检测NPS-2143对U87和Hs683细胞迁移的影响,Western blot法检测上皮间质转化(EMT)相关蛋白(N-cadherin、MMP2、MMP9)的表达水平;通过透射电镜观察NPS-2143对U87细胞中自噬囊泡数量的影响,Western blot检测细胞自噬相关蛋白(LC3、P62)和AKT-mTOR信号通路相关蛋白(p-AKT、p-mTOR)的表达水平。结果与Control组比较,NPS-2143处理组胶质瘤细胞活力与增殖能力降低,且呈时间、浓度依赖性(P<0.01);与Control组比较,NPS-2143处理组胶质瘤细胞G1期细胞比例和凋亡细胞比例升高(P<0.05);与Control组比较,NPS-2143处理组胶质瘤细胞中P21蛋白表达水平增加,Cyclin D1蛋白表达水平下降,细胞凋亡蛋白Bax和Caspase 3表达水平增加(P<0.01);与Control组比较,NPS-2143抑制胶质瘤细胞的迁移能力(P<0.01),胶质瘤细胞中N-cadherin、MMP2、MMP9的表达水平降低(P<0.01),LC3、P62、p-AKT、p-mTOR蛋白表达水平升高(P<0.01);与Control组比较,NPS-2143使胶质瘤细胞内自噬囊泡增加(P<0.01)。结论 NPS-2143能抑制胶质瘤的增殖与迁移,其机制可能与激活AKT-mTOR通路有关。

关键词：胶质瘤 NPS-2143 自噬化疗上皮间质转化

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Thermodynamic theory of flotation for a complex multiphase solid -liquid system and high-entropy flotation

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1177-1197页

作者： Shuming wen State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Land Resource EngineeringKunming University of Science and TechnologyKunming 650093China

The flotation of complex solid–liquid multiphase systems involve interactions among multiple components,the core problem facing flotation theory.Meanwhile,the combined use of multicomponent flotation reagents to improve mineral flotation has become an important issue in studies on the efficient use of refractory mineral resources.However,studying the flotation of complex solid–liquid systems is extremely difficult,and no systematic theory has been developed to date.In addition,the physical mechanism associated with combining reagents to improve the flotation effect has not been unified,which limits the development of flotation theory and the progress of flotation technology.In this study,we applied theoretical thermodynamics to a solid–liquid flotation system and used changes in the entropy and Gibbs free energy of the reagents adsorbed on the mineral surface to establish thermodynamic equilibrium equations that de-scribe interactions among various material components while also introducing adsorption equilibrium constants for the flotation reagents adsorbed on the mineral surface.The homogenization effect on the mineral surface in pulp solution was determined using the chemical potentials of the material components of the various mineral surfaces required to maintain balance.The flotation effect can be improved through synergy among multicomponent flotation reagents;its physical essence is the thermodynamic law that as the number of compon-ents of flotation reagents on the mineral surface increases,the surface adsorption entropy change increases,and the Gibbs free energy change of adsorption decreases.According to the results obtained using flotation thermodynamics theory,we established high-entropy flotation theory and a technical method in which increasing the types of flotation reagents adsorbed on the mineral surface,increasing the adsorption entropy change of the flotation reagents,decreasing the Gibbs free energy change,and improving the adsorption efficiency and stability of the flotation reagents improve

关键词： multicomponent flotation reagent adsorption entropy change equations of thermodynamic equilibrium adsorption equilibri-um constant high-entropy flotation

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Goal-Oriented Control Systems(GOCS):From HOW to WHAT

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 816-819页

作者： wen-Hua Chen the Department of Aeronautical and Automotive Engineering Loughborough UniversityLeicestershireLE113TUU.K.

Brief:New control theory is required to underpin safe design and deployment of future highly automated systems to deal with uncertain environments and complicated tasks,enabled by AI and other advanced technologies.Goal-Oriented Control Systems offer potential to transform the control system design from currently instructing a control system how to perform a task to specifying what is to be achieved.

关键词： automated instru system

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