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5 years ago

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

Tin Sulfide-Based Nanohybrid for High-Performance Anode of Sodium-Ion Batteries
Young Soo Yun, Hyoung-Joon Jin, Jaewon Choi, Paul V. Braun, Jin Gu Kang, Hyeon Ji Yoon, Kyojin Ku, Na Rae Kim, Kyungmi Lim, Kisuk Kang
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.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/smll.201700767

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