Defective Hard Carbon Anode for Na-Ion Batteries
By Zhifei Li, Yicong Chen, Zelang Jian, Heng Jiang, J. Razink, W. Stickle, J. Neuefeind, Xiulei Ji. Chemistry of Materials, 2018
225 citations recorded by the source corpus.
Hard carbon as an anode is critical for the near-future commercialization of Na-ion batteries. However, where Na ions are located at different states of charge with respect to the local structures of hard carbon remains a topic that is under debate. Recently, some groups, including ours, have suggested a structure–property correlation that assigns the slope capacity in galvanostatic charge/discharge curves to the binding of Na ions to structural defects of hard carbon. To test this correlation, herein, we prepared a highly defective hard carbon by microwaving a carbon that was obtained by pyrolysis of cellulose at 650 °C. After this microwave treatment for just 6 s, the reversible capacity of the hard carbon increased from 204 to 308 mAh/g, which is significantly higher than that of hard carbon annealed at 1100 °C for 7 h (274 mAh/g). The microwave treatment not only is energy-efficient but also retains a high extent of the structural vacancies in hard carbon, as demonstrated by neutron total scattering a...
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/1ede1370f65a72a1164636dc57675f03bf22dfb9
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Citations in the corpus
- Hard carbons for sodium-ion batteries and beyond (2020, background): “The creation of advanced porous structures [110, 112, 113], the making of defect-rich materials [182, 183] and the aforementioned heteroatom-doping [86, 184], etc.”