Batteries are changing the economics of transport and electricity storage. Falling costs and improvements in energy density have made electric vehicles more practical, while large storage systems can help grids balance variable renewable generation.
Yet the battery story is not simply about chemistry. It also involves mining, recycling, manufacturing scale, software, charging networks, and the design of the electricity grid. Different applications need different trade-offs between energy density, safety, cost, durability, and availability of materials.
The next phase may therefore be less about finding one perfect battery and more about building a portfolio of technologies. Better recycling can reduce pressure on raw materials; smarter charging can reduce strain on grids; and new chemistries can broaden the range of situations in which storage is economical.