Tracking Sodium Cluster Dynamics in Hard Carbon with a Low Specific Surface Area for Sodium‐Ion Batteries
Sejong University · Korea Institute of Science and Technology · +1 more institution
Abstract
Abstract Here, the sodium storage mechanism in commercial grade hard carbon with a low surface area is comprehensively investigated using electrochemical impedance spectroscopy (EIS), the galvanostatic intermittent titration technique, and in situ Raman spectroscopy for fresh and cycled electrodes. The reversible shift of the carbon G‐band peak on Raman spectra and substantial change of the charge‐transfer resistance in the sloping region of the voltage profile indicates the intercalation of sodium ions into hard carbon, whereas the low‐voltage plateau is associated with the pore‐filling process. In situ Raman analysis at low frequencies reveals that the pore filling is progressed via formation of small sodium…
Citation impact
- FWCI
- 32.39
- Percentile
- 100%
- References
- 67
Authors
5Topics & keywords
- Materials science
- Intercalation (chemistry)
- Electrolyte
- Raman spectroscopy
- Dielectric spectroscopy
- Carbon fibers
- Chemical engineering
- Sodium-ion battery
- Clean water and sanitation
Funding
- NRNational Research FoundationAward: NRF-2020R1A6A1A03043435
- MOMinistry of Trade, Industry and EnergyAwards: 20012196, 2020R1A6A1A03043435
- NRNational Research Foundation of KoreaAwards: 20012196, 2020R1A6A1A03043435, NRF-2020R1A6A1A03043435
- MOMinistry of Science and ICT, South KoreaAwards: NRF-2020R1A6A1A03043435, 20012196, 2020R1A6A1A03043435