2D polyaniline with exchangeable interlayer fluid for fast and stable volumetric dual ion storage

Two-dimensional (2D) layered materials are widely applied in energy devices including lithium-ion battery and supercapacitor due to their unique properties, such as tunable interlayer structure, numerous active sites, large aspect ratio versatile interlayer chemistry. In this work, 2D layered tungstate acid-linked polyaniline (TALP) presented a fluid-in-solid structure, which allowed facile exchange of the interlayer fluid from moisture to conventional Li+ containing electrolyte. With fast and stable dual ion storage (Li+ and PF6), TALP demonstrates high-rate volumetric capacity (39 mAh cm(-3) at 2000 mA g(-1)) and good stability (2000 cycles at 200 mA g(-1)) within the working potential window of 1.5-4.5 V versus Li+/Li. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.

Automated summary

In this study, a two-dimensional layered tungstate acid-linked polyaniline (TALP) with a fluid-in-solid structure showed excellent performance in high-rate and stable energy storage.