Double-tilt TIP end applied to in-situ sample rod research battery material under transmission electron microscope

Abstract

The invention discloses a double-tilt TIP end applied to an in-situ sample rod research battery material under a transmission electron microscope, and belongs to the field of material research and electron microscopes. The double-tilt TIP end comprises an electrical double-tilt TIP end and a double-tilt driving rod body, and the electrical double-tilt TIP end is installed on the double-tilt driving rod body. The electrical rod double-tilt TIP end can introduce an electrical signal and liquid into a transmission electron microscope at the same time, and a real battery charging and discharging environment and various electrochemical cycle reactions experienced by the battery charging and discharging environment are restored in an electric field and liquid environment. And the electrolyte with the thickness of less than or equal to 10nm is matched with a double-tilting function capable of tilting the sample in two degrees of freedom, so fine in-situ structure characterization is carried out aiming at specific crystal face orientation of specific particles under the condition that the high resolution of the aberration correction electron microscope is not reduced.

Description

technical field [0001] The invention belongs to the fields of material research and electron microscopy. The invention relates to a double-tilt TIP end design applied to an in-situ sample rod under a transmission electron microscope for battery material research. This design can introduce electrical signals and liquid into the transmission electron microscope at the same time, and realize the structural transformation mechanism of the material at the nanoscale under the electric field and liquid environment conditions of cyclic charge and discharge. Background technique [0002] Lithium-ion batteries have been used in various aspects of daily life, such as consumer electronics, electric vehicles, etc. However, the existing commercial lithium-ion batteries cannot meet the rapidly developing needs of electric vehicles and energy storage power stations in terms of energy density and other key indicators. Therefore, there is an urgent need to develop batteries with higher ener...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the in-situ micro-battery in the existing electron microscope cannot provide a normal electrochemical test in the in-situ charge and discharge process of the lithium-ion battery, and provide a double-tilt TIP end suitable for the in-situ sample rod of the transmission electron microscope. The TIP end can provide a real battery liquid environment, realize the structural transformation mechanism of battery materials from the atomic level, and can also realize the tilting of the sample in the β direction, making it easier to obtain a specific crystal phase

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