Inorganic lithium-ion conductors for fast-charging lithium batteries: a review

With the rapid development of electronic devices and electric vehicles, people have higher requirements for lithium-ion batteries (LIBs). Fast-charging ability has become one of the key indicators for LIBs. However, working under high current density can cause lithium dendrite growth, capacity decay, and thermal runaway. To solve the problem, it is necessary to focus on material modification and new material development. Inorganic lithium-ion conductors (ILCs) are considered as the promising candidates in batteries, semiconductors, and other fields. Herein, we review the main role of ILCs in lithium batteries with a focus on fast charging, from traditional electrolyte materials to modified materials and even Li storage anode, and we summarize the latest research progress. Finally, the future perspectives of ILCs for fast-charging lithium batteries are proposed.