Hierarchically porous Li1.2Mn0.6Ni0.2O2 as a high capacity and high rate capability positive electrode material

Shanmughasundaram Duraisamy, Tirupathi Rao Penki, Munichandraiah Nookala

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Layered composite samples of lithium-rich manganese oxide (Li1.2Mn0.6Ni0.2O2) are prepared by a reverse microemulsion route employing a soft polymer template and studied as a positive electrode material. The product samples possess dual porosity with distribution of pores at 3.5 and 60 nm. Pore volume and surface area decrease on increasing the temperature of preparation. Nevertheless, the electrochemical activity of the composite increases with an increase in temperature. The discharge capacity value of the samples prepared at 800 and 900 °C is about 240 mA h g-1 at a specific current of 25 mA g-1 with a good cycling stability. The composite sample heated at 900 °C possesses a high rate capability with a discharge capacity of 100 mA h g-1 at a specific current of 500 mA g-1. The high rate capability is attributed to porous nature of the composite sample.

Original languageEnglish
Pages (from-to)1312-1322
Number of pages11
JournalNew Journal of Chemistry
Volume40
Issue number2
DOIs
StatePublished - 1 Feb 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2016.

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