I. The three major metallic elements of ternary lithium
The name of the ternary lithium battery is derived from the three metal elements in its positive electrode material: nickel (Ni), cobalt (Co), and manganese (Mn). These three elements are combined in different proportions to form the "energy core" of the battery. Nickel is responsible for increasing the energy density, cobalt enhances the structural stability, and manganese reduces the cost and improves safety. Common ratios include NCM523, NCM622, etc. The numbers represent the proportions of the three elements.
II. Characteristics and Functions of Raw Materials
Nickel: Crucial for high energy density, but excessive content may lead to a decrease in thermal stability.
Cobalt: It stabilizes the battery structure, extends its lifespan, but it is expensive and there are supply chain issues.
Manganese: Reduces costs and enhances thermal safety, but excessive amounts will reduce energy density.
The precise proportioning of these elements directly determines the battery‘s endurance, lifespan and safety.
III. Future Development Trends
With technological advancements, low-cobalt or cobalt-free ternary materials have become the focus of research. For instance, increasing the nickel content (such as NCM811) to enhance energy density, or introducing aluminum (Al) to partially replace cobalt. These innovations aim to balance performance, cost, and sustainability, driving the development of electric vehicles and energy storage sectors.
