Porous lithium rich Li 1.2 Mn 0.54 Ni 0.22 Fe 0.04 O 2 prepared by microemulsion route as a high capacity and high rate capability positive electrode material

Tirupathi Rao Penki, D. Shanmughasundaram, N. Munichandraiah

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A porous layered composite of Li2MnO3 and LiMn0.35Ni0.55Fe0.1O2 (composition:Li1.2Mn0.54Ni0.22Fe0.04O2) is prepared by inverse microemulsion method and studied as a positive electrode material. The precursor is heated at several temperatures between 500 and 900 °C. The X-ray diffraction, scanning electron microscopy, and transmission electron microscopy studies suggested that well crystalline sub-micronsized particles are obtained. The product samples possess mesoporosity with broadly distributed pores around 10∼50 nm diameter. Pore volume and surface area decrease by increasing the temperature of preparation. However, the electrochemical activity of the composite samples increases with an increase in temperature. The discharge capacity values of the samples prepared at 900 °C are about 186 mAh g−1 at a specific current of 25 mA g−1 with an excellent cycling stability. The composite sample also possesses high rate capability. The high rate capability is attributed to the porous nature of the material.
LanguageEnglish
Pages152-160
JournalElectrochimica Acta
Volume143
DOIs
Publication statusPublished - 1 Oct 2014

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Microemulsions
Lithium
Electrodes
Composite materials
Temperature
Crystalline materials
Transmission electron microscopy
X ray diffraction
Scanning electron microscopy
Chemical analysis

Cite this

@article{c86f54bf26c646138c4737463bc71323,
title = "Porous lithium rich Li 1.2 Mn 0.54 Ni 0.22 Fe 0.04 O 2 prepared by microemulsion route as a high capacity and high rate capability positive electrode material",
abstract = "A porous layered composite of Li2MnO3 and LiMn0.35Ni0.55Fe0.1O2 (composition:Li1.2Mn0.54Ni0.22Fe0.04O2) is prepared by inverse microemulsion method and studied as a positive electrode material. The precursor is heated at several temperatures between 500 and 900 °C. The X-ray diffraction, scanning electron microscopy, and transmission electron microscopy studies suggested that well crystalline sub-micronsized particles are obtained. The product samples possess mesoporosity with broadly distributed pores around 10∼50 nm diameter. Pore volume and surface area decrease by increasing the temperature of preparation. However, the electrochemical activity of the composite samples increases with an increase in temperature. The discharge capacity values of the samples prepared at 900 °C are about 186 mAh g−1 at a specific current of 25 mA g−1 with an excellent cycling stability. The composite sample also possesses high rate capability. The high rate capability is attributed to the porous nature of the material.",
author = "Penki, {Tirupathi Rao} and D. Shanmughasundaram and N. Munichandraiah",
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journal = "Electrochimica Acta",
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Porous lithium rich Li 1.2 Mn 0.54 Ni 0.22 Fe 0.04 O 2 prepared by microemulsion route as a high capacity and high rate capability positive electrode material. / Penki, Tirupathi Rao; Shanmughasundaram, D.; Munichandraiah, N.

In: Electrochimica Acta, Vol. 143, 01.10.2014, p. 152-160.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Porous lithium rich Li 1.2 Mn 0.54 Ni 0.22 Fe 0.04 O 2 prepared by microemulsion route as a high capacity and high rate capability positive electrode material

AU - Penki, Tirupathi Rao

AU - Shanmughasundaram, D.

AU - Munichandraiah, N.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - A porous layered composite of Li2MnO3 and LiMn0.35Ni0.55Fe0.1O2 (composition:Li1.2Mn0.54Ni0.22Fe0.04O2) is prepared by inverse microemulsion method and studied as a positive electrode material. The precursor is heated at several temperatures between 500 and 900 °C. The X-ray diffraction, scanning electron microscopy, and transmission electron microscopy studies suggested that well crystalline sub-micronsized particles are obtained. The product samples possess mesoporosity with broadly distributed pores around 10∼50 nm diameter. Pore volume and surface area decrease by increasing the temperature of preparation. However, the electrochemical activity of the composite samples increases with an increase in temperature. The discharge capacity values of the samples prepared at 900 °C are about 186 mAh g−1 at a specific current of 25 mA g−1 with an excellent cycling stability. The composite sample also possesses high rate capability. The high rate capability is attributed to the porous nature of the material.

AB - A porous layered composite of Li2MnO3 and LiMn0.35Ni0.55Fe0.1O2 (composition:Li1.2Mn0.54Ni0.22Fe0.04O2) is prepared by inverse microemulsion method and studied as a positive electrode material. The precursor is heated at several temperatures between 500 and 900 °C. The X-ray diffraction, scanning electron microscopy, and transmission electron microscopy studies suggested that well crystalline sub-micronsized particles are obtained. The product samples possess mesoporosity with broadly distributed pores around 10∼50 nm diameter. Pore volume and surface area decrease by increasing the temperature of preparation. However, the electrochemical activity of the composite samples increases with an increase in temperature. The discharge capacity values of the samples prepared at 900 °C are about 186 mAh g−1 at a specific current of 25 mA g−1 with an excellent cycling stability. The composite sample also possesses high rate capability. The high rate capability is attributed to the porous nature of the material.

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DO - 10.1016/j.electacta.2014.07.155

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JO - Electrochimica Acta

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SN - 0013-4686

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