Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 6, 2019
Previous Article Next Article

A high energy-density P2-Na2/3[Ni0.3Co0.1Mn0.6]O2 cathode with mitigated P2–O2 transition for sodium-ion batteries

Author affiliations

Abstract

High voltage P2-Na2/3[Ni1/3Mn2/3]O2 is regarded as a promising cathode for high-energy sodium-ion batteries (SIBs). However, the undesired P2–O2 phase transition at high voltages above 4.0 V leads to a large volume change and further causes the rapid decay of capacity. Herein, an electrochemical-active Co3+ substitution is introduced to suppress the P2–O2 phase transformation but not at the cost of capacity. The spherical, Co3+ substituted P2-Na2/3[Ni0.3Co0.1Mn0.6]O2 with a high tap-density of 1.86 g cm−3 is successfully synthesized by co-precipitation and solid-state reactions. As anticipated, it delivers a large specific capacity of 161.6 mA h g−1 with a high median-voltage of 3.64 V (vs. Na/Na+), translated into a high energy-density of ∼590 W h kg−1, which is comparable to that of the commercialized LiCoO2 cathode in lithium-ion batteries. Apart from improved cycling stability ascribed to the mitigated P2–O2 transition, this cathode also shows a better rate property compared with those modified by Li+, Mg2+, Zn2+, Cu2+, and Ti4+ doping and Al2O3 coating. Besides, the P2-Na2/3[Ni0.3Co0.1Mn0.6]O2|hard carbon full-cells deliver a reversible capacity of 150.6 mA h g−1 and have enhanced cycle-life and high-rate capability. These gratifying achievements indicate that this P2-Na2/3[Ni0.3Co0.1Mn0.6]O2 is a very promising candidate as a high energy-density cathode for SIBs.

Graphical abstract: A high energy-density P2-Na2/3[Ni0.3Co0.1Mn0.6]O2 cathode with mitigated P2–O2 transition for sodium-ion batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Nov 2018, accepted on 07 Jan 2019 and first published on 08 Jan 2019


Article type: Paper
DOI: 10.1039/C8NR09601E
Citation: Nanoscale, 2019,11, 2787-2794

  •   Request permissions

    A high energy-density P2-Na2/3[Ni0.3Co0.1Mn0.6]O2 cathode with mitigated P2–O2 transition for sodium-ion batteries

    P. Hou, Y. Sun, F. Li, Y. Sun, X. Deng, H. Zhang, X. Xu and L. Zhang, Nanoscale, 2019, 11, 2787
    DOI: 10.1039/C8NR09601E

Search articles by author

Spotlight

Advertisements