Synthesis and electrochemical characteristics of x Li2MnO3-(1-x)Li(Mn0.375Ni0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) thin film cathode for lithium rechargeable micro batteries

A. Sharma; C. Ghanty; S. B. Majumder

doi:10.1016/j.solidstatesciences.2014.08.018

Synthesis and electrochemical characteristics of x Li₂MnO₃-(1-x)Li(Mn_0.375Ni_0.375Co_0.25)O₂ (0.0 ≤ x ≤ 1.0) thin film cathode for lithium rechargeable micro batteries

A. Sharma, C. Ghanty, S. B. Majumder

Indian Institute of Technology Kharagpur

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We have compared the structure, microstructure, and electrochemical characteristics of xLi₂MnO₃e(1-x) Li(Mn_0.375Ni_0.375Co_0.25)O₂ (0.0 ≤ x ≤ 1.0) thin films with their bulk cathode laminate counterparts of identical compositions. Pure Li(Mn_0.375Ni_0.375Co_0.25)O₂ as well as the synthesized composite films partially transform into cubic spinel structure during chargeedischarge cycling. In contrast, such layered to spinel phase transformation has only been identified in bulk cathode laminates with x ≥ 0.75. At a current density 0.05 mAcm^-2, the discharge capacity of Li(Mn_0.375Ni_0.375Co_0.25)O₂ thin film was measured to be ~60 μAhcm^-2. The discharge capacity (~217 mAhcm^-2) was markedly improved in x~0.5 composite thin film. The capacity retention after 20 charge discharge cycles are improved in composite films; however, their capacity fading could not be eliminated completely.

Original language	English
Pages (from-to)	114-120
Number of pages	7
Journal	Solid State Sciences
Volume	37
DOIs	https://doi.org/10.1016/j.solidstatesciences.2014.08.018
State	Published - Nov 2014
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2014 Elsevier Masson SAS.

Funding

The research work was partially supported by the equipment grant from the Alexander von Humboldt Foundation, Bonn, Germany. One of the authors, Mr. C. Ghanty, would also like to acknowledge CSIR (CSIR letter No.: 10-2(5)/2007(ii)-E.U.II dt. 15.05.2008 ), Govt. of India for providing him a Research Fellowship under CSIR-NET scheme.

Funders	Funder number
CSIR-NET
Alexander von Humboldt-Stiftung

Keywords

Integrated cathode material
Lithium rechargeable battery
Phase transitions
Solegel processes
Thin film

Access to Document

10.1016/j.solidstatesciences.2014.08.018

Cite this

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title = "Synthesis and electrochemical characteristics of x Li2MnO3-(1-x)Li(Mn0.375Ni0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) thin film cathode for lithium rechargeable micro batteries",

abstract = "We have compared the structure, microstructure, and electrochemical characteristics of xLi2MnO3e(1-x) Li(Mn0.375Ni0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) thin films with their bulk cathode laminate counterparts of identical compositions. Pure Li(Mn0.375Ni0.375Co0.25)O2 as well as the synthesized composite films partially transform into cubic spinel structure during chargeedischarge cycling. In contrast, such layered to spinel phase transformation has only been identified in bulk cathode laminates with x ≥ 0.75. At a current density 0.05 mAcm-2, the discharge capacity of Li(Mn0.375Ni0.375Co0.25)O2 thin film was measured to be ~60 μAhcm-2. The discharge capacity (~217 mAhcm-2) was markedly improved in x~0.5 composite thin film. The capacity retention after 20 charge discharge cycles are improved in composite films; however, their capacity fading could not be eliminated completely.",

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N2 - We have compared the structure, microstructure, and electrochemical characteristics of xLi2MnO3e(1-x) Li(Mn0.375Ni0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) thin films with their bulk cathode laminate counterparts of identical compositions. Pure Li(Mn0.375Ni0.375Co0.25)O2 as well as the synthesized composite films partially transform into cubic spinel structure during chargeedischarge cycling. In contrast, such layered to spinel phase transformation has only been identified in bulk cathode laminates with x ≥ 0.75. At a current density 0.05 mAcm-2, the discharge capacity of Li(Mn0.375Ni0.375Co0.25)O2 thin film was measured to be ~60 μAhcm-2. The discharge capacity (~217 mAhcm-2) was markedly improved in x~0.5 composite thin film. The capacity retention after 20 charge discharge cycles are improved in composite films; however, their capacity fading could not be eliminated completely.

AB - We have compared the structure, microstructure, and electrochemical characteristics of xLi2MnO3e(1-x) Li(Mn0.375Ni0.375Co0.25)O2 (0.0 ≤ x ≤ 1.0) thin films with their bulk cathode laminate counterparts of identical compositions. Pure Li(Mn0.375Ni0.375Co0.25)O2 as well as the synthesized composite films partially transform into cubic spinel structure during chargeedischarge cycling. In contrast, such layered to spinel phase transformation has only been identified in bulk cathode laminates with x ≥ 0.75. At a current density 0.05 mAcm-2, the discharge capacity of Li(Mn0.375Ni0.375Co0.25)O2 thin film was measured to be ~60 μAhcm-2. The discharge capacity (~217 mAhcm-2) was markedly improved in x~0.5 composite thin film. The capacity retention after 20 charge discharge cycles are improved in composite films; however, their capacity fading could not be eliminated completely.

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