Controlled Synthesis of Mesoporous <i>π</i>‐Conjugated Polymer Nanoarchitectures as Anodes for Lithium‐Ion Batteries
Limin Shi, Wenda Li, Yong Wu, Facai Wei, Tingting Zhang, Jianwei Fu, Chengbin Jing, Jiangong Cheng, Shaohua Liu
Abstract
Abstract Conjugated polymers possess better electron conductivity due to large π ‐electron conjugated configuration endowing them significant scientific and technological interest. However, the obvious deficiency of active‐site underutilization impairs their electrochemical performance. Therefore, designing and engineering π ‐conjugated polymers with rich redox functional groups and mesoporous architectures could offer new opportunities for them in these emerging applications and further expand their application scopes. Herein, a series of 1,3,5‐tris(4‐aminophenyl) benzene (TAPB)‐based π ‐conjugated mesoporous polymers ( π ‐CMPs) are constructed by one‐pot emulsion‐induced interface assembly strategy. Furthermore, co‐induced in situ polymerization on 2D interfaces by emulsion and micelles is explored, which delivers sandwiched 2D mesoporous π ‐CMPs‐coated graphene oxides (GO@mPTAPB). Benefiting from specific redox‐active functional groups, excellent electron conductivity and a 2D mesoporous conjugated framework, GO@mPTAPB exhibits high capability of accommodating Li + anions (up to 382 mAh g −1 at 0.2 A g −1 ) and outstanding electrochemical stability (87.6% capacity retention after 1000 cycles). The ex situ Raman and impedance spectra are further applied to reveal the high reversibility of GO@mPTAPB. This work will greatly promote the development of advanced π ‐CMPs‐based organic anodes toward energy storage devices.