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Boosting Performance of Na-S Batteries Using Sulfur-Doped Ti3C2Tx MXene Nanosheets with a Strong Affinity to Sodium Polysulfides

Journal Article


Abstract


  • Sodium-sulfur batteries using abundant elements offer an attractive alternative to currently used batteries, but they need better sulfur host materials to compete with lithium-ion batteries in capacity and cyclability. We report an in situ sulfur-doping strategy to functionalize MXene nanosheets by introducing heteroatomic sulfur into the MXene structure form the MAX phase precursor. By employing the vacuum freeze-drying method, a three-dimensional (3D) wrinkled MXene nanoarchitecture with the high specific surface area was prepared. The tailor-made wrinkled sulfur-doped MXene (S-Ti3C2Tx) nanosheets were applied as an electrode host material in room temperature sodium-sulfur batteries. The S-Ti3C2Tx matrix shows high polarity with sodium polysulfides, restricting the diffusion of sodium polysulfides. The MXene/sulfur electrode can achieve high areal sulfur loading up to 4.5 mg cm-2 as well as good electrochemical performance (reversible capacity of 577 mAh g-1 at 2 C after 500 cycles).

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2019

Citation


  • Bao, W., Shuck, C. E., Zhang, W., Guo, X., Gogotsi, Y., & Wang, G. (2019). Boosting Performance of Na-S Batteries Using Sulfur-Doped Ti3C2Tx MXene Nanosheets with a Strong Affinity to Sodium Polysulfides. ACS Nano, 13(10), 11500-11509. doi:10.1021/acsnano.9b04977

Scopus Eid


  • 2-s2.0-85072920066

Start Page


  • 11500

End Page


  • 11509

Volume


  • 13

Issue


  • 10

Abstract


  • Sodium-sulfur batteries using abundant elements offer an attractive alternative to currently used batteries, but they need better sulfur host materials to compete with lithium-ion batteries in capacity and cyclability. We report an in situ sulfur-doping strategy to functionalize MXene nanosheets by introducing heteroatomic sulfur into the MXene structure form the MAX phase precursor. By employing the vacuum freeze-drying method, a three-dimensional (3D) wrinkled MXene nanoarchitecture with the high specific surface area was prepared. The tailor-made wrinkled sulfur-doped MXene (S-Ti3C2Tx) nanosheets were applied as an electrode host material in room temperature sodium-sulfur batteries. The S-Ti3C2Tx matrix shows high polarity with sodium polysulfides, restricting the diffusion of sodium polysulfides. The MXene/sulfur electrode can achieve high areal sulfur loading up to 4.5 mg cm-2 as well as good electrochemical performance (reversible capacity of 577 mAh g-1 at 2 C after 500 cycles).

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2019

Citation


  • Bao, W., Shuck, C. E., Zhang, W., Guo, X., Gogotsi, Y., & Wang, G. (2019). Boosting Performance of Na-S Batteries Using Sulfur-Doped Ti3C2Tx MXene Nanosheets with a Strong Affinity to Sodium Polysulfides. ACS Nano, 13(10), 11500-11509. doi:10.1021/acsnano.9b04977

Scopus Eid


  • 2-s2.0-85072920066

Start Page


  • 11500

End Page


  • 11509

Volume


  • 13

Issue


  • 10