Bio-derived hard carbon nanosheets with high rate sodium-ion storage characteristics
نویسندگان
چکیده
Biomass is a sustainable precursor of hard carbons destined for use in sodium-ion batteries. This study explores the synthesis carbon nanosheets (HCNS) from oxidized cork and impact temperature on characteristics. An increase carbonization 1000 to 1500 °C generally leads lower BET specific surface areas (~55 20 m2 g?1) d002 interlayer spacing (~ 4.0 3.7 Å). The effect reflected initial coulombic efficiency (iCE) which increases 72% at 88% °C, as result decrease area, structural defects verified using Raman scattering. cycling (~25, 30 55 °C) rate capability long-term investigated high precision coulometry cycler. For galvanostatic test mA g?1 ~ 25 reversible capacity 276 mAh observed with an iCE ~88%. Increasing enhances performance, but slightly lowers (~86% 81% °C). At g?1, capacities obtained are average 260 270 respectively. constant-current constant-voltage (CCCV) tests conducted ranging 252 268, 247–252, 237–242 can be 10, 100, respective about 272–290, 260–279, 234–265 100 g?1. applicability HCNS electrodes eventually evaluated full-cells Prussian white cathodes, discharge 152 ~90%.
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ژورنال
عنوان ژورنال: Sustainable Materials and Technologies
سال: 2022
ISSN: ['2214-9929', '2214-9937']
DOI: https://doi.org/10.1016/j.susmat.2022.e00407