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透射电镜液体电化学原位系统

产品特点

采用MEMS微加工工艺在原位样品台内构建液氛纳米实验室,通过MEMS芯片对薄层或纳米电池系统施加电信号等,在进行电学性质测量的同时,结合使用EDS、EELS、SAED、HRTEM、STEM等多种不同模式,实现从纳米甚至原子层面实时、动态监测电极、电解液及其界面在工况下的微观结构演化、反应动力学、相变、元素价态、化学变化、微观应力以及表/界面处的原子级结构和成分演化等关键信息。

  • 产品组成
  • 独特优势
  • 功能参数
  • 应用案例
  • a.液体电化学原位样品杆
    b.MEMS液体电化学芯片
    c.电学控制程序
    d.电化学工作站
    e.高精度芯片组装仪
    f.高真空检漏仪
    g.原位液氛纳流控安全管理系统
    h.附件包
    i.液体杆清洗仪
    j.芯片环境制样仓
    关键词:
    • 液体电化学
    • 原位液体样品杆
    • 原位液体电化学样品杆
    • MEMS液体电化学芯片
    • 原位液体电化学
    • 原位液体样品杆
  •    
    业界最高分辨率 ·1.独创的MEMS加工工艺,芯片视窗区域的氮化硅膜厚度最薄可达10nm。
    ·2.芯片封装采用键合内封以及环氧树脂外封双保险方式,使芯片间的夹层最薄仅约100~200nm,超薄夹层大幅减少对电子束的干扰,可清晰观察样品的原子排列情况,液相环境可实现原子级分辨。
    ·3.经过特殊设计的芯片视窗形状,可避免氮化硅膜鼓起导致液层增厚而影响分辨率。
    高安全性 ·1.市面常见的其他品牌液体样品杆,由于受自身液体池芯片设计方案制约,只能通过液体泵产生的巨大压力推动大流量液体流经样品台及芯片外围区域,有液体大量泄露的安全隐患。其液体主要靠扩散效应进入芯片中间的纳米孔道,芯片观察窗里并无真实流量流速控制。
    ·2.采用纳流控专利技术,通过压电微控系统进行流体微分控制,实现纳升级微量流体输送,原位纳流控系统及样品杆中冗余的液体量仅有微升级别,有效保证电镜安全。
    ·3.采用高分子膜面接触密封技术,相比于o圈密封,增大了密封接触面积,有效减小渗漏风险。
    ·4.采用超高温镀膜技术,芯片视窗区域的氮化硅膜具有耐高温低应力耐压耐腐蚀耐辐照等优点。
    独有的多场耦合技术 ·可在液相环境中实现光、电、热、流体多场耦合。
    智能化软件和自动化设备 ·1.人机分离,软件远程控制实验条件,全程自动记录实验细节数据,便于总结与回顾。
    ·2.全流程配备精密自动化设备,协助人工操作,提高实验效率。
    团队优势 ·1.团队带头人在原位液相TEM发展初期即参与研发并完善该方法。
    ·2.独立设计原位芯片,掌握芯片核心工艺,拥有多项芯片专利。
    ·3.团队20余人从事原位液相TEM研究,可提供多个研究方向的原位实验技术支持。

                   

           

     

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    类别 项目 参数
    基本参数 杆身材质 高强度钛合金
    视窗膜厚 标配20nm(可升级10nm)
    适用电镜 ThermoFisher/FEI, JEOL, Hitachi
    适用极靴 ST, XT, T, BioT, HRP, HTP, CRP
    倾转角 α=±20°(实际范围取决于透射电镜和极靴型号)
    (HR)TEM/STEM 支持
    (HR)EDS/EELS/SAED 支持

     

    了解更多详情

  •  

    Design of liquid-cell EC-TEM to investigate the interfacial reactions of LiPSs.

    Visualizing interfacial collective  reaction behaviour of Li–S batteries

    Nature 621, 75–81 (2023)

    Diffusion dynamics of single ions showing local reciprocating ion hopping motion.

    Observing ion diffusion and reciprocating hopping motion in water

    SCIENCE ADVANCES.28 Jul 2023.Vol 9, Issue 30

    (a) Growth and dissolution of Li–Au alloy and Li dendrite. Reprinted with permission from Zeng et al., Nano Lett. 14, 1745–1750 (2014). Copyright 2014 American Chemical Society. (b) (i) HAADF-STEM images of Li deposition and dissolution at the interface between Pt electrode and LiPF6/PC electrolyte during cycles. (ii) Deposition of Li metal nanoparticles from LiTf in tetraethylene glycol dimethyl (TEGDME) with saturated O2 electrolyte. (iii) and (iv) Simulations of contrast expected for dark-field images of 5 nm nanoparticles. Contrast reversal is detected in pure Li metal, and Li is less dense than 
    the electrolyte.

    Liquid cell electrochemical TEM: Unveiling the real-time interfacial reactions of advanced Li-metal batteries
    J. Chem. Phys. 157, 230901 (2022)

    In situ atomic resolution HRTEM observation on the behaviors of sulfobetaine molecules at the solid-liquid interface under external electric field and the formation of the waterproof layer around the negative electrode surface.
    Controlling Interfacial Structural Evolution in Aqueous Electrolyte via Anti-Electrolytic Zwitterionic Waterproofing.
    Adv. Funct. Mater. 2022, 2207140.

    Comparative illustration of graphite layers and atomic channels. Schematic illustration of (a) typical Li+ intercalation in graphite layers and (b) superdense Li diffusion in atomic channels.


    Efficient diffusion of superdense lithium via atomic channels for dendrite-free lithium–metal batteries
    Energy & Environmental Science 2022, 15 (1), 196-205.

    High-resolution aberration-corrected STEM images of Pt NPs on the a) Pt/α-PtOx/WO3, b) Pt/α-PtOx/WO3-300, and c) Pt/α-PtOx/WO3-400. The corresponding fast Fourier transform (FFT) pattern of the amorphous interface (a1), (b1), (c1) and crystal structure (a2), (b2), (c2) in the Pt NPs. The statistical ratio of crystalline Pt and amorphous PtOx for different Pt/α-PtOx/WO3 hybrids are shown in the inset of STEM images. d) High-resolution aberration-corrected STEM image of Pt NPs on the Pt/c-PtOx/WO3 with crystal PtOx interface.


    Engineering of Amorphous PtOx Interface on Pt/WO3 Nanosheets for Ethanol Oxidation Electrocatalysis
    Advanced Functional Materials 2021, 31 (28)

             

    (a, b) TEM images of CeO2 and MoO3–CeOx;
    (c) elemental distributions of Mo, Ce, and O in MoO3–CeOx;
    (d, e) HRTEM images of MoO3–CeOx and size distribution of MoO3;
    (f) HRTEM image and FFT pattern of the CeOx support


    CeOx-supported monodispersed MoO3 clusters for high-efficiency electrochemical nitrogen reduction under ambient condition
    Journal of Energy Chemistry 56 2021 186-192.

           

    SAED patterns of NiS2/PtNi NWs (a) and Ni3S2/PtNi NWs (d), high-resolution HAADF–STEM images of NiS2/PtNi NWs hetero- structures (b, c) and Ni3S2/PtNi NWs heterostructures (e, f)
    Microstrain Engineered NixS2/PtNi Porous Nanowires for Boosting Hydrogen Evolution Activity
    Energy Fuels 2021, 35, (8) 6928–6934.

             

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