Skip to main content
placeholder image

P2-type Na2/3Ni1/3Mn2/3O2as a cathode materialwith high-rate and long-life for sodium ionstorage

Journal Article


Abstract


  • Layered P2-type Na 2/3 Ni 1/3 Mn 2/3 O 2 was successfully synthesized through a facile sol-gel method and subsequent heat treatment. Resulting from different phase transformation and sodium ion diffusion rates, its electrochemical performance is highly related to the cut-off voltage and the electrolyte used. When the cut-off voltage is set up to 4.5 V or lowered to 1.5 V, capacity fade happens due to the occurrence of P2-O2 transformation and electrolyte decomposition or the redox reaction of the Mn 4+ /Mn 3+ ionic pair and P2-P2′ transformation. The electrode maintained 89.0 mA h g -1 with good cycling stability and excellent structural preservation between 4.0 and 2.0 V. The capacity retention is 71.2% even after 1200 cycles at 10C. It can be expected that P2-type Na 2/3 Ni 1/3 Mn 2/3 O 2 is very promising as a cathode material for sodium ion batteries.

Authors


  •   Liu, Qiannan (external author)
  •   Hu, Zhe (external author)
  •   Chen, Mingzhe (external author)
  •   Zou, Chao (external author)
  •   Jin, Huile (external author)
  •   Wang, Shun (external author)
  •   Gu, Qinfen (external author)
  •   Chou, Shulei

Publication Date


  • 2019

Citation


  • Liu, Q., Hu, Z., Chen, M., Zou, C., Jin, H., Wang, S., Gu, Q. & Chou, S. (2019). P2-type Na2/3Ni1/3Mn2/3O2as a cathode materialwith high-rate and long-life for sodium ionstorage. Journal of Materials Chemistry A, 7 (15), 9215-9221.

Scopus Eid


  • 2-s2.0-85064231075

Number Of Pages


  • 6

Start Page


  • 9215

End Page


  • 9221

Volume


  • 7

Issue


  • 15

Place Of Publication


  • United Kingdom

Abstract


  • Layered P2-type Na 2/3 Ni 1/3 Mn 2/3 O 2 was successfully synthesized through a facile sol-gel method and subsequent heat treatment. Resulting from different phase transformation and sodium ion diffusion rates, its electrochemical performance is highly related to the cut-off voltage and the electrolyte used. When the cut-off voltage is set up to 4.5 V or lowered to 1.5 V, capacity fade happens due to the occurrence of P2-O2 transformation and electrolyte decomposition or the redox reaction of the Mn 4+ /Mn 3+ ionic pair and P2-P2′ transformation. The electrode maintained 89.0 mA h g -1 with good cycling stability and excellent structural preservation between 4.0 and 2.0 V. The capacity retention is 71.2% even after 1200 cycles at 10C. It can be expected that P2-type Na 2/3 Ni 1/3 Mn 2/3 O 2 is very promising as a cathode material for sodium ion batteries.

Authors


  •   Liu, Qiannan (external author)
  •   Hu, Zhe (external author)
  •   Chen, Mingzhe (external author)
  •   Zou, Chao (external author)
  •   Jin, Huile (external author)
  •   Wang, Shun (external author)
  •   Gu, Qinfen (external author)
  •   Chou, Shulei

Publication Date


  • 2019

Citation


  • Liu, Q., Hu, Z., Chen, M., Zou, C., Jin, H., Wang, S., Gu, Q. & Chou, S. (2019). P2-type Na2/3Ni1/3Mn2/3O2as a cathode materialwith high-rate and long-life for sodium ionstorage. Journal of Materials Chemistry A, 7 (15), 9215-9221.

Scopus Eid


  • 2-s2.0-85064231075

Number Of Pages


  • 6

Start Page


  • 9215

End Page


  • 9221

Volume


  • 7

Issue


  • 15

Place Of Publication


  • United Kingdom