Issue 35, 2015

A high rate Li-rich layered MNC cathode material for lithium-ion batteries

Abstract

We report a high rate Li-rich layered manganese nickel cobalt (MNC) oxide cathode material of the composition 0.5Li2MnO3·0.5LiMn0.5Ni0.35Co0.15O2, termed Li-rich MNC cathode material, with discharge capacities of 200, 250, and 290 mA h g−1 at C, C/4 and C/20 rates, respectively, for Li-ion batteries. This high rate discharge performance combined with little capacity fade during long term cycling is unprecedented for this class of lithium ion (Li-ion) cathode materials. The exceptional electrochemistry of the Li-rich MNC in Li-ion cells is attributed to its open porous morphology and high electronic conductivity. The structure of the material investigated by means of X-ray diffraction (XRD), High Resolution Transmission Electron Microscopy (HRTEM) and X-ray Absorption Spectroscopy (XAS) combined with electrochemical data revealed that the porous morphology was effective in allowing electrolyte penetration through the particle grains in tandem with its high electronic conductivity to provide high Li+ transport for high rate discharge. Extended cycling behavior and structural phase transition of the new material were further examined through Field Emission Scanning Electron Microscopy (FESEM), XRD, XAS and HRTEM. The new Li-rich MNC cathode material could provide the next generation Li-ion batteries with specific energy exceeding 400 W h kg−1 or energy density over 1000 W h l−1.

Graphical abstract: A high rate Li-rich layered MNC cathode material for lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
30 ဒီ 2014
Accepted
12 မတ် 2015
First published
12 မတ် 2015

RSC Adv., 2015,5, 27375-27386

Author version available

A high rate Li-rich layered MNC cathode material for lithium-ion batteries

M. N. Ates, S. Mukerjee and K. M. Abraham, RSC Adv., 2015, 5, 27375 DOI: 10.1039/C4RA17235C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements