This comment reviews key milestones in the development of lithium-ion batteries, from early work with lithium metal and titanium disulfide to the adoption of graphite anodes, lithium cobalt oxide cathodes, and stable electrolytes. The authors highlight the importance of incremental progress, mechanistic understanding, and cross-disciplinary research in achieving these breakthroughs.

None identified

A well-written historical overview that clearly explains key discoveries and challenges in lithium-ion battery development. However, it's a retrospective comment piece, not a novel research study, hence the slightly lower rating.