4.7 Article

Improving the structural and cyclic stabilities of P2-type Na0.67MnO2cathode material via Cu and Ti co-substitution for sodium ion batteries

Journal

CHEMICAL COMMUNICATIONS
Volume 56, Issue 46, Pages 6293-6296

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc01442g

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Funding

  1. National Key RAMP
  2. D Program of China [2018YFB0104300]
  3. NSF of China [21633003, 51802149]
  4. NSF of Jiangsu Province, China [BK20170630]

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An air-stable Na0.67Mn0.7Cu0.15Ti0.15O2(NMCT) has been synthesized using a solid-state method. It displays a reversible capacity of 170 mA h g(-1)and a capacity retention of 82.5% after 300 cycles. NMCT also exhibits good structural stability upon electrochemical de/intercalation processes as observed byoperandoXRD. And the result shows that the unit-cell volume change of NMCT during the whole process of Na(+)de/intercalation is only 3.2%. These data indicate that NMCT is a promising cathode material for sodium ion batteries (SIBs).

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