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Garnet-Type Fast Li-Ion Conductors with High Ionic Conductivities for All-Solid-State Batteries

Journal Article


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Abstract


  • All-solid-state Li-ion batteries with metallic Li anodes and solid electrolytes could offer superior energy density and safety over conventional Li-ion batteries. However, compared with organic liquid electrolytes, the low conductivity of solid electrolytes and large electrolyte/electrode interfacial resistance impede their practical application. Garnet-type Li-ion conducting oxides are among the most promising electrolytes for all-solid-state Li-ion batteries. In this work, the large-radius Rb is doped at the La site of cubic Li6.10Ga0.30La3Zr2O12 to enhance the Li-ion conductivity for the first time. The Li6.20Ga0.30La2.95Rb0.05Zr2O12 electrolyte exhibits a Li-ion conductivity of 1.62 mS cm-1 at room temperature, which is the highest conductivity reported until now. All-solid-state Li-ion batteries are constructed from the electrolyte, metallic Li anode, and LiFePO4 active cathode. The addition of Li(CF3SO2)2N electrolytic salt in the cathode effectively reduces the interfacial resistance, allowing for a high initial discharge capacity of 152 mAh g-1 and good cycling stability with 110 mAh g-1 retained after 20 cycles at a charge/discharge rate of 0.05 C at 60 °C.

UOW Authors


  •   Wu, Jiang-Fang (external author)
  •   Pang, Wei Kong
  •   Peterson, Vanessa K. (external author)
  •   Wei, Lu (external author)
  •   Guo, Xin (external author)

Publication Date


  • 2017

Citation


  • Wu, J., Pang, W., Peterson, V. K., Wei, L. & Guo, X. (2017). Garnet-Type Fast Li-Ion Conductors with High Ionic Conductivities for All-Solid-State Batteries. ACS Applied Materials and Interfaces, 9 (14), 12461-12468.

Scopus Eid


  • 2-s2.0-85017565264

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3505&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2481

Number Of Pages


  • 7

Start Page


  • 12461

End Page


  • 12468

Volume


  • 9

Issue


  • 14

Place Of Publication


  • United States

Abstract


  • All-solid-state Li-ion batteries with metallic Li anodes and solid electrolytes could offer superior energy density and safety over conventional Li-ion batteries. However, compared with organic liquid electrolytes, the low conductivity of solid electrolytes and large electrolyte/electrode interfacial resistance impede their practical application. Garnet-type Li-ion conducting oxides are among the most promising electrolytes for all-solid-state Li-ion batteries. In this work, the large-radius Rb is doped at the La site of cubic Li6.10Ga0.30La3Zr2O12 to enhance the Li-ion conductivity for the first time. The Li6.20Ga0.30La2.95Rb0.05Zr2O12 electrolyte exhibits a Li-ion conductivity of 1.62 mS cm-1 at room temperature, which is the highest conductivity reported until now. All-solid-state Li-ion batteries are constructed from the electrolyte, metallic Li anode, and LiFePO4 active cathode. The addition of Li(CF3SO2)2N electrolytic salt in the cathode effectively reduces the interfacial resistance, allowing for a high initial discharge capacity of 152 mAh g-1 and good cycling stability with 110 mAh g-1 retained after 20 cycles at a charge/discharge rate of 0.05 C at 60 °C.

UOW Authors


  •   Wu, Jiang-Fang (external author)
  •   Pang, Wei Kong
  •   Peterson, Vanessa K. (external author)
  •   Wei, Lu (external author)
  •   Guo, Xin (external author)

Publication Date


  • 2017

Citation


  • Wu, J., Pang, W., Peterson, V. K., Wei, L. & Guo, X. (2017). Garnet-Type Fast Li-Ion Conductors with High Ionic Conductivities for All-Solid-State Batteries. ACS Applied Materials and Interfaces, 9 (14), 12461-12468.

Scopus Eid


  • 2-s2.0-85017565264

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3505&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2481

Number Of Pages


  • 7

Start Page


  • 12461

End Page


  • 12468

Volume


  • 9

Issue


  • 14

Place Of Publication


  • United States