The main components of lithium-ion batteries include positive electrode materials, negative electrode materials, separators, and electrolytes. The testing, evaluation, and analysis of battery materials and batteries are not only crucial for ensuring the quality of batteries, but also directly affect the safety and performance of electric vehicles. Thermo Fisher Scientific Co., Ltd. provides a complete set of micro characterization technology solutions to achieve high-precision analysis of particle size, shape, and composition of micro nano scale structures. It can also perform multi-scale, high-precision analysis and detection of materials of various sizes in two and three dimensions. This solution mainly includes Thermo Scientific ™ HeliScan µ CT (multifunctional computed tomography system), scanning electron microscope, gallium ion dual beam electron microscope, Xe plasma dual beam electron microscope, transmission electron microscope, and other parts.