Unveiling the Microscopic Origin of Irreversible Capacity Loss of Hard Carbon for Sodium‐Ion Batteries
Central South University · Shanghai Jiao Tong University · +1 more institution
Abstract
Abstract The primary bottleneck hindering the application of hard carbon in sodium‐ion batteries (SIBs) anodes lies in its inadequate initial Coulombic efficiency (ICE). Unclear causes of capacity loss at the microscopic level restrict the improvement of hard carbon anodes. Here, two pivotal stages that influence the structure and composition of hard carbon, namely synthesis, and storage are evaluated; subsequently identifying crucial determinants contributing to irreversible capacity loss. The results suggest that undergrown carbon layers allowing the intrusion of solvent molecules into the interior of the hard carbon is a key factor during the synthesis stage, while the gradual formation of oxygen‐containing…
Citation impact
- FWCI
- 21.68
- Percentile
- 100%
- References
- 40
Authors
8Topics & keywords
- Materials science
- Ion
- Sodium
- Carbon fibers
- Chemical engineering
- Nanotechnology
- Chemical physics
- Composite material