NDLI: Three-dimensional graphene/polyimide composite-derived flexible high-performance organic cathode for rechargeable lithium and sodium batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Jingjing Shakir, Imran Duan, Xiangfeng Zhong, Xing Huang, Yanshan Li, Ke Xu, Yuxi
Copyright Year	2017
Abstract	Organic cathodes, especially conjugated carbonyl polymers, have been developed as promising alternatives to inorganic cathodes for rechargeable lithium and sodium batteries due to their high theoretical capacities, fast reaction kinetics, mechanical flexibility, environmental sustainability, and structural diversity. However, because of the intrinsic electrical insulation of conjugated carbonyl polymers, it is a great challenge to simultaneously achieve high capacity, high rate capability, and long cycle life. In this paper we report, for the first time, the preparation of monolithic 3D graphene/polyimide composites (GF–PI) through a one-step solvothermal strategy with simultaneous in situ polymerization of PI on the graphene surface and self-assembly of graphene into a 3D network structure. The mechanically strong GF–PI can be used directly as highly flexible lithium-ion-battery (LIB) cathodes without adding any other binder or conductive carbon and deliver a very high reversible capacity (240 mA h g−1 at 40 mA g−1), excellent rate capability (102 mA h g−1 at 4000 mA g−1) and remarkable cycling stability (81.2% capacity retention after 600 cycles at 100 mA g−1). The flexible GF–PI electrode also delivers an ultrahigh Na storage capacity of 213 mA h g−1 at 50 mA g−1, and outstanding capacity retention of 80.4% after 1000 cycles at 1000 mA g−1 when used as a sodium-ion-battery (SIB) cathode. The comprehensive electrochemical performances of GF–PI are superior to those of the state-of-art PI-based LIB and SIB cathodes that have been reported thus far.
Starting Page	2710
Ending Page	2716
Page Count	7
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	5
Issue Number	6
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta09754e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	SIB Carbonyl group Lithium Sodium Three-dimensional space Graphene Polyimide Polymerization Self-assembly Excipient Carbon Electrode Cathode Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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