Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6609104 | Electrochimica Acta | 2016 | 28 Pages |
Abstract
Nitrogen-doped carbon microspheres (NCSs) derived from oatmeal are employed as anodes for sodium ion batteries (SIBs). Their morphology, structure and electrochemical performance are characterized by field emission scanning electron microscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, nitrogen adsorption-desorption isotherms, galvanostatic charge/discharge tests, cyclic voltammetry and electrochemical impedance spectroscopy, respectively. The results show that NCSs treated at 500 °C exhibit a high maximum charge capacity of 336 mA h gâ1 after 50 cycles at a current density of 50 mA gâ1 and even at a high current density of 10 A gâ1 within 70 s charging time, a capacity of 104 mA h gâ1 is maintained after 12500 cycles without obvious decay. The high capacity, excellent rate performance, long life cycling and ultrafast rechargeable ability enable the NCSs to be a promising candidate for practical SIBs.
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Dong Yan, Caiyan Yu, Xiaojie Zhang, Wei Qin, Ting Lu, Bingwen Hu, Huili Li, Likun Pan,