Premium
Partially Reduced Holey Graphene Oxide as High Performance Anode for Sodium‐Ion Batteries
Author(s) -
Zhao Jin,
Zhang YiZhou,
Zhang Fan,
Liang Hanfeng,
Ming Fangwang,
Alshareef Husam N.,
Gao Zhiqiang
Publication year - 2019
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201803215
Subject(s) - graphene , materials science , anode , oxide , electrode , chemical engineering , ion , carbon fibers , current density , redox , sodium , energy storage , nanotechnology , composite material , composite number , organic chemistry , metallurgy , chemistry , power (physics) , physics , quantum mechanics , engineering
The current Na + storage performance of carbon‐based materials is still hindered by the sluggish Na + ion transfer kinetics and low capacity. Graphene and its derivatives have been widely investigated as electrode materials in energy storage and conversion systems. However, as anode materials for sodium‐ion batteries (SIBs), the severe π–π restacking of graphene sheets usually results in compact structure with a small interlayer distance and a long ion transfer distance, thus leading to low capacity and poor rate capability. Herein, partially reduced holey graphene oxide is prepared by simple H 2 O 2 treatment and subsequent low temperature reduction of graphene oxide, leading to large interlayer distance (0.434 nm), fast ion transport, and larger Na + storage space. The partially remaining oxygenous groups can also contribute to the capacity by redox reaction. As anode material for SIBs, the optimized electrode delivers high reversible capacity, high rate capability (365 and 131 mAh g −1 at 0.1 and 10 A g −1 , respectively), and good cycling performance (163 mAh g −1 after 3000 cycles at a current density of 2 A g −1 ), which is among the best reported performances for carbon‐based SIB anodes.