Advancements in sodium-ion batteries: An in-depth scientometric review

Sodium-ion batteries (SIBs) are emerging as a scalable, cost-effective alternative to lithium-based technologies for large-scale energy storage. However, a systematic, data-driven understanding of the field's evolution has remained absent. Here, we present the first comprehensive scientometric analysis of SIB research, encompassing 15,682 peer-reviewed articles published between 2000 and 2024. Our analysis captures key research trends, material innovations, conceptual terminology shifts, and global collaboration networks. We highlight critical advancements in electrode materials, electrolyte systems, and full-cell performance, while identifying persistent challenges—particularly in improving energy density and long-term stability. The study maps the global research ecosystem, revealing China–US collaboration as dominant driver of innovation. By integrating bibliometric insights with technical evaluations, this review offers a panoramic view of the SIB domain, bridging knowledge gaps and tracing emerging research trajectories. Our findings provide a data-driven foundation to understand the changing landscape of SIB research. They offer practical insights to help scientists, industry leaders, and policymakers drive innovation, solve current challenges, and develop scalable energy storage solutions.