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Three‐Dimensional Graphene‐based N‐doped Carbon Composites as High‐Performance Anode Materials for Sodium‐ion Batteries
Author(s) -
Chang Bin,
Chen Jing,
Zhou Mingan,
Zhang Xiaojie,
Wei Wei,
Dai Bin,
Han Sheng,
Huang Yanshan
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201801484
Subject(s) - graphene , carbonization , materials science , anode , carbon fibers , nitrogen , composite material , chemical engineering , coating , polyimide , graphene foam , layer (electronics) , sodium ion battery , composite number , electrode , scanning electron microscope , graphene oxide paper , nanotechnology , chemistry , organic chemistry , faraday efficiency , engineering
A nitrogen‐doped carbon layer coating on a 3D graphene framework (NCL@GF) was produced by the in‐situ polymerization of a uniform polyimide layer on the graphene framework surface and a carbonization process. The NCL@GF exhibited a 3D macroporous structure with uniform N‐doped porous carbon layers and a high 5.4 at. % nitrogen content, which not only effectively enhanced the active sites but also facilitated fast ion and electron transport in the 3D pathways. Consequently, the NCL@GF as the anode of a sodium‐ion battery (SIB) exhibited a discharge capacity of 357 mAh g −1 at 0.1 A g −1 after 200 cycles, a remarkable rate capability with a capacity of 122 mAh g −1 at 8 A g −1 , and a super long cycle life with a capacity retention of 70 % capacity after 2500 cycles at 0.5 A g −1 . Such performance is superior to that of previously reported carbon or graphene‐based composites.