A TiSe2-Graphite dual ion battery: fast Na-Ion insertion and excellent stability
(2021) Angewandte Chemie (International Edition) — Vol. 60, n° 34, p. 18430-18437 (2021)
Files
anie202105439_accepted.docx
Open Access - Microsoft Word XML
- 9.16 MB
Details
- Authors
Su, Bao‐Lian 
- Abstract
- The sodium dual ion battery (Na-DIB) technology is proposed as highly promising alternative over lithium-ion batteries for the stationary electrochemical energy-storage devices. However, the sluggish reaction kinetics of anode materials seriously impedes their practical implementation. Herein, a Na-DIB based on TiSe2-graphite is reported. The high diffusion coefficient of Na-ions (3.21×10−11–1.20×10−9 cm2 s−1) and the very low Na-ion diffusion barrier (0.50 eV) lead to very fast electrode kinetics, alike in conventional surface capacitive storage systems. In-situ investigations reveal that the fast Na-ion diffusion involves four insertion stage compositions. A prototype cell shows a reversible capacity of 81.8 mAh g−1 at current density of 100 mA g−1, excellent stability with 83.52 % capacity retention over 200 cycles and excellent rate performance, suggesting its potential for next-generation large scale high-performance stationary energy storage systems.
- Affiliations
Citations
Zheng, R., Yu, H., Zhang, X., Ding, Y., Xia, M., Cao, K., Shu, J., Vlad, A., & Su, B.-L. (2021). A TiSe2-Graphite dual ion battery: fast Na-Ion insertion and excellent stability. Angewandte Chemie (International Edition), 60(34), 18430-18437. https://doi.org/10.1002/anie.202105439 (Original work published 2021)