Electrochemical and structural study of layered P2-type Na2/3Ni1/3Mn2/3O2 as cathode material for sodium-ion battery

Yanfen Wen, Bei Wang, Guang Zeng, Kazuhiro Nogita, Delai Ye, Lianzhou Wang

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P2-type Na2/3Ni1/3Mn2/3O2 was synthesized by a controlled co-precipitation method followed by a high-temperature solid-state reaction and was used as a cathode material for a sodium-ion battery (SIB). The electrochemical behavior of this layered material was studied and an initial discharge capacity of 151.8 mAhg-1 was achieved in the voltage range of 1.5-3.75 V versus Na+/Na. The retained discharge capacity was found to be 123.5 mAhg-1 after charging/dis charging 50 cycles, approximately 81.4% of the initial discharge capacity. In situ X-ray diffraction analysis was used to investigate the sodium insertion and extraction mechanism and clearly revealed the reversible structural changes of the P2-Na2/3Ni1/3Mn2/3O2 and no emergence of the O2-Ni1/3Mn2/3O2 phase during the cycling test, which is important for designing stable and high-performance SIB cathode materials.

Original languageEnglish
Pages (from-to)661-666
Number of pages6
JournalChemistry - An Asian Journal
Issue number3
Publication statusPublished - Jan 1 2015

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Organic Chemistry

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