Lithium Iron Phosphate at the Conquest of the Battery World

Lithium-ion batteries (LIBs) are widely utilized in a vast spectrum of energy-related applications (e.g., electric vehicles and grid storage). In terms of specific capacity and operating voltage, lithium iron phosphate (LiFePO4, LFP) has traditionally lagged behind high-energy positive electrode materials [e.g., Li(NiMnCo)O2]; however, it has nonetheless emerged as the dominant positive electrode material among today’s battery systems. This is largely due to its reliance on abundant, noncritical elements (e.g., free of cobalt and nickel), excellent thermal stability, and extended cycle life without the need for intensive cooling. Herein, using LFP chemistry as an archetype, we outline the essential performance indicators for positive electrode design aimed at practical battery applications while highlighting common pitfalls within isolated research domains. We underscore that the path to impactful materials innovation depends not only on inherent chemical and physical properties but also on environmental compatibility and technological sustainability. This manuscript also aims to provide educators with a conceptual framework and accompanying resources to incorporate LFP chemistry into undergraduate and graduate curricula in materials chemistry, physical chemistry, and related disciplines.