Fast-Charging Solid-State Lithium Metal Batteries: A Review

Nowadays solid-state lithium metal batteries (SSLMBs) catch researchers' attention and are considered as the most promising energy storage devices for their high energy density and safety. However, compared to lithium-ion batteries (LIBs), the low ionic conductivity in solid-state electrolytes (SSEs) and poor interface contact between SSEs and electrodes counteract some advantages of SSEs. As a result, SSLMBs show high energy density but low critical current density and slow charging speed. Herein, the recent progress and proposed strategies for fast-charging SSLMBs are reviewed. In the second part of this review, various strategies for improving SSE performance in fast-charging batteries are comprehensively highlighted. In the third part, various rational structure design schemes benefitting fast-charging batteries are discussed. Finally, the development of fast-charging SSLMBs is concluded and prospected. It is believed that the combination of fast-charging times and SSLMBs is rather competitive for next-generation, high energy density, high safety, and high charging rate energy storage devices.