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Engineering Anisotropically Curved Nitrogen‐Doped Carbon Nanosheets with Recyclable Binary Flux for Sodium‐Ion Storage
Author(s) -
Chen Yuxiang,
Li Jie,
Lai Yanqing,
Xu Ming,
Li Junming,
Wang Peng,
Zhang Zhian
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201702436
Subject(s) - graphene , materials science , carbon fibers , chemical engineering , electrochemistry , energy storage , diffusion , sodium ion battery , ion , nanotechnology , sodium , heteroatom , doping , electrode , chemistry , organic chemistry , composite number , composite material , optoelectronics , ring (chemistry) , power (physics) , physics , quantum mechanics , faraday efficiency , engineering , metallurgy , thermodynamics
As a low‐cost substitute of graphene and graphene derivatives, 2D carbon nanosheets are considered to be attractive materials for high‐performance electrochemical energy‐storage devices. Nevertheless, the lack of cost‐effective and green preparation methods still greatly impedes the application of 2D carbon nanosheets in sodium‐ion batteries. Herein, an environmental friendly and versatile strategy is proposed to engineer anisotropically curved nitrogen‐doped carbon nanosheets (CNCNs) derived from biosources with hydrosoluble and recyclable flux. After undergoing serious corrosion from the LiCl/KCl binary flux, the resulting CNCNs possess high structural stability. Notably, the CNCNs also possess a rational specific surface area, open porous structure, and abundant accessible edges, which can shorten the ion‐diffusion path, provide abundant accessible active sites, and result in less charge‐transfer impedance and excellent sodium‐ion diffusion coefficient (8.9×10 −10 cm 2 s −1 ). As a consequence, CNCN electrodes can deliver a high specific capacity of 361.6 mAh g −1 at 50 mA g −1 . Such architecture provides a promising structural platform for the fabrication of 2D carbons for highly reversible and high capacity sodium‐ion batteries.