Battery Electrode Materials: Advanced High-Capacity Technology Drives Performance Leap of New Energy Batteries

The performance breakthrough of new energy batteries lies in the technological upgrading of electrode materials. Traditional electrode materials have problems such as low energy density and short cycle life. The new generation of products has achieved leapfrog development in performance through material modification and structural innovation.

The core technology in the production and manufacturing process lies in "nanosization of active materials + porous structure design". Taking lithium-ion battery cathode materials as an example, spray drying and high-temperature sintering processes are used to nanosize NCM particles (particle size 100-300nm), increase the specific surface area, and improve lithium ion diffusion rate; at the same time, carbon nanotubes are introduced as conductive additives to build a three-dimensional conductive network and reduce electrode internal resistance. For anode materials, silicon-carbon composite technology is adopted, in which silicon particles (particle size <50nm) are uniformly dispersed in the graphite matrix. The high specific capacity of silicon (4200mAh/g) is used to improve the overall energy density, and the structural stability of graphite is used to alleviate the volume expansion problem of silicon. In addition, the roll pressing process is used in the electrode preparation process to precisely control the thickness of the pole piece (tolerance <5μm) to ensure the consistency and stability of the electrode.

In terms of performance characteristics, the upgraded battery electrode materials have three advantages: "high energy density, long cycle life, and high rate performance". The energy density of cathode materials can reach 200-250Wh/kg, and that of anode materials can reach 500-600Wh/kg, which is 20%-30% higher than traditional materials; after 1000 cycles at 1C rate, the capacity retention rate is still above 80%; at the same time, it supports high-rate charging above 3C, meeting the fast-charging needs of new energy vehicles.

Application fields cover all scenarios of new energy batteries: in the field of power batteries, they provide high endurance and long-life power support for new energy vehicles, adapting to pure electric, plug-in hybrid and other models; in the field of energy storage batteries, they are used in grid energy storage and home energy storage systems to ensure stable power supply; in the field of consumer electronics, they provide high-capacity and fast-charging battery solutions for smartphones and laptops; in addition, they are applied to electric tools, drones and other scenarios to promote the electrification process in various fields.

In the future, battery electrode materials will further explore technical routes such as high nickel and lithium-rich, develop cathode materials with energy density >300Wh/kg and anode materials with silicon content >30%, and optimize the material preparation process to reduce production costs, continuously promoting new energy batteries to develop towards high energy density and long cycle life, and providing core material support for the large-scale application of the new energy industry.