The year 2021 marked a significant milestone in the evolution of battery technology, a field that is increasingly becoming the cornerstone of our digital and environmentally conscious society. From powering our smartphones and laptops to driving the revolution in electric vehicles and renewable energy storage, the importance of efficient, reliable, and fast-charging batteries cannot be overstated. This year, we witnessed a series of groundbreaking advancements that promise to reshape our approach to energy storage and management.