Low temperature synthesis and superior lithium storage properties of fluorine-rich tubular porous carbon

Developing high performance porous carbon is a significant issue for the anode materials of lithium-ion batteries. Here, fluorine-rich tubular porous carbon (FTPC) was prepared by low temperature pyrolysis of fluorine-rich conjugated microporous polymer. Tubular porous carbon (TPC) was also prepared from conjugated microporous polymer and used as a control. The structure and lithium storage properties of the FTPC and TPC were compared and investigated. Compared with TPC, FTPC possesses large mesoporous and macroporous specific surface area as well as rich fluorine (up to 16.10 wt%), which make FTPC show superb specific capacity and rate performance. The initial charge capacity of FTPC is as high as 786 mAh g(-1), much higher than that of TPC (151 mAh g(-1)). In addition, quantitative kinetic analysis discloses the dominated pseudocapacitive contribution of lithium storage in FTPC, attributed to the one-dimensional hollow structure, developed porous structure and high fluorination. Our work provides a new way to design and improve the lithium storage properties of porous carbon. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

This study developed fluorine-rich tubular porous carbon (FTPC) through low temperature pyrolysis and compared its structure and lithium storage properties with tubular porous carbon (TPC). The results showed that FTPC exhibited a larger specific surface area, higher fluorine content, and superior specific capacity and rate performance compared to TPC. Quantitative kinetic analysis revealed the dominant pseudocapacitive contribution of lithium storage in FTPC, which was attributed to its one-dimensional hollow structure, developed porous structure, and high fluorination.