NLR is researching advanced electrochemical energy storage systems, including redox flow batteries and solid-state batteries. Electrochemical energy storage systems face evolving requirements. Electric vehicle applications require batteries with high energy density and fast-charging capabilities.. For transportation, the grid, and applications such as sensors, industry seeks lower-cost, higher-performance batteries with greater reliability and safety than those available in today's market. To address this need, PNNL plays a key role in developing new materials and processes that are. . 2Mathematical Modeling and Numerical Simulation Laboratory (LAM2SIN) Faculty of Technology, Badji Mokhtar University, P.O. Box 12, Annaba 23000, Algeria. Abstract—This study provides a comprehensive overview of recent advances in electrochemical energy storage, including Na+-ion, metal-ion, and.