Insight into the Role of Closed‐Pore Size on Rate Capability of Hard Carbon for Fast‐Charging Sodium‐Ion Batteries
Chinese Academy of Sciences · Beijing National Laboratory for Molecular Sciences · +2 more institutions
Abstract
Abstract The sluggish Na ion diffusion kinetics and Na metal plating in hard carbon negative electrodes restrict the fast‐charging of sodium‐ion batteries, which is intricately entwined with the crystal structure and pore structure. Here, the pore structures of hard carbon materials are focused on and reveal that the pore size significantly affects the Na‐filling potentials during the sodiation process. Specifically, the micro closed pores exhibit higher Na‐filling potentials, which reduces risks of Na metal plating at high current densities, thus enabling improved rate performance. As a result, the optimized hard carbon with closed micropores (1.6 nm) achieves an initial capacity exceeding 400 mAh g −1 at 20…
Citation impact
- FWCI
- 65.64
- Percentile
- 100%
- References
- 47
Authors
12- SXShuhao Xiao
Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences
- YGYu‐Jie Guo
Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, University of Chinese Academy of Sciences
- YGYu‐Jie GuoCorresponding
Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, University of Chinese Academy of Sciences
- HCHanxian Chen
Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, University of Chinese Academy of Sciences
- HLHaizhou Liu
Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences
Topics & keywords
- Materials science
- Chemical engineering
- Diffusion
- Sodium
- Carbon fibers
- Electrode
- Ion
- Anode