Use of PicoFemto®In situ sample rod published research results continue to update, the future small series will continue to update product application cases. Teachers who missed the previous report can also click "previous articles" on the front page of the public number to read. You are also welcome to pay attention to the public number. Here are the cutting-edge information in the field of electron microscopy, special experimental schemes and high-level research results. Come and open your brains with your friends.

On May 18, Dr. Yang Yijun of Professor Wang Xi (corresponding author) team of Beijing Jiaotong University and Associate Professor Liu Xizhong (co-author) of Tianjin University of Technology, Academician Yao Jiannian of Institute of Chemistry of Chinese Academy of Sciences, International Electron Microscope Daniel Yoshio Bando, Dmitri Golberg and others published a summary of "The Role of Geometric Sites in 2D Materials for Energy Storage" in international journals. In this paper, the effects of geometric sites (point defects, line defects, surface defects, etc.) in two-dimensional nanomaterials on their electronic structure and the corresponding storage and transport processes of lithium/sodium ions are discussed in detail. (DOI:10.1016/j.joule. 2018.04.027)

In order to clarify the role of geometric sites in lithium/sodium ion batteries, researchers applied in-situ X-ray diffraction, in-situ X-ray absorption, in-situ Raman spectroscopy, in-situ infrared spectroscopy, in-situ nuclear magnetic resonance and other research methods. However, in situ transmission electron microscopy is a research tool that can dynamically observe the operation mechanism of lithium/sodium batteries at the atomic scale. In situ transmission electron microscopy technology can not only directly observe the evolution of structure and morphology, but also observe the diffusion of lithium/sodium ions at the atomic scale in real time, and also observe the electrochemical reaction in the process of charge and discharge in real time. The in-situ study of the nitrogen/phosphorus doped graphene nanobattery built in TEM using the in-situ sample rod of the PicoFemto series of in-situ samples reported in the article, which fully supports the theoretical research of the article.

In this study, nitrogen/phosphorus doped graphene was immobilized on a gold electrode and served as the anode of the cell, metallic lithium was immobilized at a tungsten tip and served as the cathode of the cell, and an ionic liquid served as the electrolyte of the cell.

PicoFemto series sample rods not only captured high-resolution electron microscope images of nitrogen/phosphorus doped graphene in-plane structure before and after lithium insertion under in-situ transmission electron microscope, but also clearly observed the morphological changes after lithium removal of nano-batteries in situ.

This review further establishes the advantages and position of Zelo's in-situ TEM solutions in lithium and other related research.

Figure: Application of multi-level geometry based on two-dimensional materials in lithium/sodium storage. (a) Schematic diagram of PicoFemto in-situ transmission electron microscope sample rod and nitrogen-doped graphene nano-battery; (B) High-resolution electron microscope images of nitrogen-doped graphene in-plane structure before and after lithium intercalation under in-situ transmission electron microscope;(c) Schematic diagram of phosphorus-doped graphene nano-battery and real-time observation of the change of interlayer spacing in phosphorus-doped graphene during lithium intercalation/deintercalation by in-situ transmission electron microscope;(d) Real-time observation of morphological changes of black phosphorus/graphene mixed materials during lithium intercalation by in-situ transmission electron microscope;(e) Schematic diagram of in-situ transmission electron microscope liquid cell;(f) MoS2 nano-battery was constructed in the liquid cell through LiPF6/EC/DEC electrolyte, and its morphological changes were observed in real time;(g) The formation of SEI film on Ti electrode was observed in real time by in situ electron microscope.