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A TiSe 2 -Graphite Dual Ion Battery: Fast Na-Ion Insertion and Excellent Stability.
- Source :
-
Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2021 Aug 16; Vol. 60 (34), pp. 18430-18437. Date of Electronic Publication: 2021 Jul 01. - Publication Year :
- 2021
-
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 TiSe <subscript>2</subscript> -graphite is reported. The high diffusion coefficient of Na-ions (3.21×10 <superscript>-11</superscript> -1.20×10 <superscript>-9</superscript> cm <superscript>2</superscript> s <superscript>-1</superscript> ) 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 <superscript>-1</superscript> at current density of 100 mA g <superscript>-1</superscript> , 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.<br /> (© 2021 Wiley-VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1521-3773
- Volume :
- 60
- Issue :
- 34
- Database :
- MEDLINE
- Journal :
- Angewandte Chemie (International ed. in English)
- Publication Type :
- Academic Journal
- Accession number :
- 34038605
- Full Text :
- https://doi.org/10.1002/anie.202105439