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Compact Coupled Graphene and Porous Polyaryltriazine‐Derived Frameworks as High Performance Cathodes for Lithium‐Ion Batteries
Author(s) -
Su Yuezeng,
Liu Yuxin,
Liu Ping,
Wu Dongqing,
Zhuang Xiaodong,
Zhang Fan,
Feng Xinliang
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201410154
Subject(s) - graphene , materials science , lithium (medication) , cathode , ion , porosity , chemical engineering , nanotechnology , composite material , chemistry , engineering , psychology , psychiatry , organic chemistry
It is highly desirable to develop electroactive organic materials and their derivatives as green alternatives of cathodes for sustainable and cost‐effective lithium‐ion batteries (LIBs) in energy storage fields. Herein, compact two‐dimensional coupled graphene and porous polyaryltriazine‐derived frameworks with tailormade pore structures are fabricated by using various molecular building blocks under ionothermal conditions. The porous nanosheets display nanoscale thickness, high specific surface area, and strong coupling of electroactive polyaryltriazine‐derived frameworks with graphene. All these features make it possible to efficiently depress the dissolution of redox moieties in electrolytes and to boost the electrical conductivity of whole electrode. When employed as a cathode in LIBs, the two‐dimensional porous nanosheets exhibit outstanding cycle stability of 395 mAh g −1 at 5 A g −1 for more than 5100 cycles and excellent rate capability of 135 mAh g −1 at a high current density of 15 A g −1 .