Li metal is considered to be one of the most promising anode materials for next-generation batteries due to its high theoretical capacity and low redox potential. However, practical application of Li metal anode has been impeded by the Li dendrites, which are generated during the cycling of Li plating/stripping and lead to safety issues. Researchers attempt to solve this problem by spatially confining the Li plating. Yet, the effective directing of Li deposition into the confined space is challenging. Here, we construct an interlayer between graphitic carbon nitrite layer (g-C3N4) and carbon cloth (CC), enabling the site-directed dendrite-free Li plating. The g-C3N4/CC as anode scaffold enables extraordinary cycling stability for over 1500 hours with a small over-potential of ~80 mV at 2 mA cm-2. Furthermore, prominent battery performance is also demonstrated in full cell (Li/g-C3N4/CC as anode and LiCoO2 as cathode) with high Coulombic efficiency of 99.4% over 300 cycles.

Interlayered lithium scaffold for dendrite-free and high-performance lithium metal batteries

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.