Achieving stable lithium metal anodes via the synergy of electrostatic shielding and the high Li+ flux inorganic interphase
Jiangtao Yu1, Xinyu Ma1, Xiuyang Zou2,Yin Hu1,Mingchen Yang1, Jinhua Yang1, Shipeng Sun1, Feng Yan(严锋)1,3*
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
2School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
3State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China
Energy Environ. Sci., 2024,17, 4519-4530
Abstract: Uncontrolled dendrite growth and slow Li+ transport kinetics at the anode/electrolyte interface severely hamper the practical applications of lithium metal batteries (LMBs). Herein, a high-charge density cationic polymer, poly(octaallyltetraazacyclo-decane nitrate) (POTA-NO3), was developed as an anodic protective layer to moderate Li+ deposition and enhance Li+ transport efficiency. According to Li+ deposition characteristics and simulation, POTA-NO3 with multiple positive charge sites provided excellent electrostatic shielding and enhanced Li+ desolvation process to the anodes. Meanwhile, anions generated a robust and high Li+ flux inorganic SEI to inhibit the polymer cationic layer and electrolyte decomposition. With the POTA-NO3 protective layer, Li||Li symmetric batteries achieved a stable cycling of 6300 h at a high current density of 5 mA cm-2 with a capacity of 5 mA h cm-2. Furthermore, the POTA-NO3-protected Li||LiCoO2 batteries exhibited a capacity retention of over 80% after 1400 long-term cycles at 1C. This work opens up the possibility for the development of stable lithium anodes.
链接：//pubs.rsc.org/en/content/articlelanding/2024/ee/d4ee00399c
