Laser processing lithium-ion battery anode

Abstract

Since the beginning of the new century, energy and environmental issues have always been a hot topic of discussion and research. With the rapid consumption of traditional fossil energy and environmental problems becoming increasingly prominent, it is urgent to find efficient energy storage devices. Lithium-ion battery is a common and representative energy storage device in secondary batteries, and the structure of its electrode material is a key factor affecting the electrochemical performance and safe service life of the entire lithium-ion battery. Laser is widely used in electrode processing due to its high energy concentration, small heat-affected zone, high processing precision, and low requirements for processing environment. Laser processing technology for cutting, drying, constructing three-dimensional micro/nano-structured electrodes or directly printing battery materials can greatly reduce manufacturing costs and improve the electrochemical performance. In this study, the application of several laser processing technologies in the structure of the negative electrode of lithium ion battery is reviewed. The application of laser in electrode cutting, drying and annealing is discussed from the perspective of laser energy concentration and small thermal influence. Starting from the relationship of efficiency, the strategy of constructing a three-dimensional structure on the negative electrode of lithium ion battery by laser processing technology is summarized. The electrochemical performance and the service life of lithium ion battery are prospected.