Researchers led by a team from MIT, with colleagues from Oak Ridge National Laboratory (ORNL), BMW Group, and Tokyo Institute of Technology have developed a fundamentally new approach to alter ion mobility and stability against oxidation of lithium ion conductors—a key component of rechargeable batteries—using lattice dynamics. The new approach, described in a paper in the RSC journal Energy and Environmental Science, could accelerate the development of high-energy solid-state lithium batteries, and possibly other energy storage and delivery devices such as fuel cells.