Journal of Research in Applied Chemistry

Authors: Dr. Anjali Verma, Neha R. Mishra

Abstract: Electrochemical energy storage systems have become a cornerstone of modern technological development, supporting applications ranging from portable electronics to electric vehicles and large-scale grid storage. Among these systems, lithium-ion batteries have emerged as the most commercially successful technology due to their high energy density, long cycle life, and reliable performance. However, concerns related to lithium resource scarcity, rising costs, and environmental impact have accelerated interest in alternative battery chemistries. Sodium-ion batteries have gained significant attention as a promising substitute owing to the natural abundance and low cost of sodium. This paper presents a comprehensive comparative analysis of lithium-ion and sodium-ion battery chemistry, focusing on their electrochemical principles, electrode materials, electrolyte systems, performance characteristics, advantages, and limitations. Key challenges related to energy density, cycling stability, safety, and scalability are critically discussed. Furthermore, recent advancements and future research directions aimed at improving sodium-ion battery competitiveness are highlighted. The study concludes that while lithium ion batteries remain dominant in high-performance applications, sodium-ion batteries offer substantial potential for sustainable and cost-effective energy storage solutions, particularly in stationary and grid-scale applications.

KEYWORDS: Lithium-ion batteries; Sodium-ion batteries; Electrochemical energy storage; Battery materials; Sustainable energy storage