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Plasma-Induced Amorphous Shell and Deep Cation-Site S Doping Endow TiO2 with Extraordinary Sodium Storage Performance

Journal Article


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Abstract


  • Structural design and modification are effective approaches to regulate the physicochemical properties of TiO 2 , which play an important role in achieving advanced materials. Herein, a plasma-assisted method is reported to synthesize a surface-defect-rich and deep-cation-site-rich S doped rutile TiO 2 (R-TiO 2- x -S) as an advanced anode for the Na ion battery. An amorphous shell (≈3 nm) is induced by the Ar/H 2 plasma, which brings about the subsequent high S doping concentration (≈4.68 at%) and deep doping depth. Experimental results and density functional theory calculations demonstrate greatly facilitated ion diffusion, improved electronic conductivity, and an increased mobility rate of holes for R-TiO 2- x -S, which result in superior rate capability (264.8 and 128.5 mAh g -1 at 50 and 10 000 mA g -1 , respectively) and excellent cycling stability (almost 100% retention over 6500 cycles). Such improvements signify that plasma treatment offers an innovative and general approach toward designing advanced battery materials.

Authors


  •   He, Hanna (external author)
  •   Huang, Dan (external author)
  •   Pang, Wei Kong.
  •   Sun, Dan (external author)
  •   Wang, Qi (external author)
  •   Tang, Yougen (external author)
  •   Ji, Xiaobo (external author)
  •   Guo, Zaiping
  •   Wang, Haiyan (external author)

Publication Date


  • 2018

Citation


  • He, H., Huang, D., Pang, W., Sun, D., Wang, Q., Tang, Y., Ji, X., Guo, Z. & Wang, H. (2018). Plasma-Induced Amorphous Shell and Deep Cation-Site S Doping Endow TiO2 with Extraordinary Sodium Storage Performance. Advanced Materials, 30 (26), 1801013-1-1801013-8.

Scopus Eid


  • 2-s2.0-85046622139

Ro Full-text Url


  • http://ro.uow.edu.au/context/aiimpapers/article/4151/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3101

Start Page


  • 1801013-1

End Page


  • 1801013-8

Volume


  • 30

Issue


  • 26

Place Of Publication


  • Germany

Abstract


  • Structural design and modification are effective approaches to regulate the physicochemical properties of TiO 2 , which play an important role in achieving advanced materials. Herein, a plasma-assisted method is reported to synthesize a surface-defect-rich and deep-cation-site-rich S doped rutile TiO 2 (R-TiO 2- x -S) as an advanced anode for the Na ion battery. An amorphous shell (≈3 nm) is induced by the Ar/H 2 plasma, which brings about the subsequent high S doping concentration (≈4.68 at%) and deep doping depth. Experimental results and density functional theory calculations demonstrate greatly facilitated ion diffusion, improved electronic conductivity, and an increased mobility rate of holes for R-TiO 2- x -S, which result in superior rate capability (264.8 and 128.5 mAh g -1 at 50 and 10 000 mA g -1 , respectively) and excellent cycling stability (almost 100% retention over 6500 cycles). Such improvements signify that plasma treatment offers an innovative and general approach toward designing advanced battery materials.

Authors


  •   He, Hanna (external author)
  •   Huang, Dan (external author)
  •   Pang, Wei Kong.
  •   Sun, Dan (external author)
  •   Wang, Qi (external author)
  •   Tang, Yougen (external author)
  •   Ji, Xiaobo (external author)
  •   Guo, Zaiping
  •   Wang, Haiyan (external author)

Publication Date


  • 2018

Citation


  • He, H., Huang, D., Pang, W., Sun, D., Wang, Q., Tang, Y., Ji, X., Guo, Z. & Wang, H. (2018). Plasma-Induced Amorphous Shell and Deep Cation-Site S Doping Endow TiO2 with Extraordinary Sodium Storage Performance. Advanced Materials, 30 (26), 1801013-1-1801013-8.

Scopus Eid


  • 2-s2.0-85046622139

Ro Full-text Url


  • http://ro.uow.edu.au/context/aiimpapers/article/4151/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3101

Start Page


  • 1801013-1

End Page


  • 1801013-8

Volume


  • 30

Issue


  • 26

Place Of Publication


  • Germany