Tin Sulfide‐Based Nanohybrid for High‐Performance Anode of Sodium‐Ion Batteries

• Published in: Small (Weinheim an der Bergstrasse, Germany) Vol. 13; no. 30
• Main Authors: Choi, Jaewon, Kim, Na Rae, Lim, Kyungmi, Ku, Kyojin, Yoon, Hyeon Ji, Kang, Jin Gu, Kang, Kisuk, Braun, Paul V., Jin, Hyoung‐Joon, Yun, Young Soo
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 01-08-2017
• Subjects: anode; Battery cycles; carbon nanotubes; Dimethyl ether; Electric potential; Energy conversion efficiency; Energy management; Multi wall carbon nanotubes; nanohybrids; Nanotechnology; Nanotubes; Na‐ion battery; Rechargeable batteries; Sodium-ion batteries; tin sulfide; anode; carbon nanotubes; tin sulfide; Na-ion battery; nanohybrids
• ISSN: 1613-6810; 1613-6829
• DOI: 10.1002/smll.201700767

Nanohybrid anode materials for Na‐ion batteries (NIBs) based on conversion and/or alloying reactions can provide significantly improved energy and power characteristics, while suffering from low Coulombic efficiency and unfavorable voltage properties. An NIB paper‐type nanohybrid anode (PNA) based on tin sulfide nanoparticles and acid‐treated multiwalled carbon nanotubes is reported. In 1 m NaPF6 dissolved in diethylene glycol dimethyl ether as an electrolyte, the above PNA shows a high reversible capacity of ≈1200 mAh g−1 and a large voltage plateau corresponding to a capacity of ≈550 mAh g−1 in the low‐voltage region of ≈0.1 V versus Na+/Na, exhibiting high rate capabilities at a current rate of 1 A g−1 and good cycling performance over 250 cycles. In addition, the PNA exhibits a high first Coulombic efficiency of ≈90%, achieving values above 99% during subsequent cycles. Furthermore, the feasibility of PNA usage is demonstrated by full‐cell tests with a reported cathode, which results in high specific energy and power values of ≈256 Wh kg−1 and 471 W kg−1, respectively, with stable cycling.
A paper‐type nanohybrid anode (PNA) based on tin sulfide nanoparticles and acid‐treated multi‐walled carbon nanotubes is fabricated for Na‐ion batteries, showing feasible electrochemical performance with high Coulombic efficiency and low‐voltage plateau.