Challenges and Potential Solutions in Solid-State Lithium Metal Anode Batteries for Electric Vehicles

This paper explores the emerging field of solid-state lithium metal anode batteries for electric vehicles (EVs), comparing them with current lithium-ion battery technologies such as LFP, NMC, and NCA. It focuses on how solid-state batteries work and highlights their key advantages: improved safety due to the absence of flammable liquid electrolytes, dramatically higher energy density from pure lithium metal anodes, ultra-fast charging capabilities, and potentially quicker, more efficient production processes. The paper also identifies major technological drawbacks: persistent stability problems (chemical, electrochemical, mechanical, and thermal), performance issues at lower temperatures, short life cycles compared to established chemistries, and high manufacturing costs arising from limited scale. The core of this research examines why these problems arise and reviews cutting-edge solutions — such as interfacial coatings, gradient doping, multi-layer electrolyte designs, composite electrolytes, and advanced cell and thermal management strategies — pointing the way toward more stable, commercially viable solid-state batteries.