Surface/chemically modified LiMn2O4 cathodes for lithium-ion batteries

Research output: Contribution to journalArticle

141 Citations (Scopus)

Abstract

LiMn2O4 spinel oxide has been surface/chemically modified with LixCoO2, LiNi0.5Co0.5O2, Al2O3, and MgO using a chemical processing procedure followed by heat-treatment at 300-800°C. The surface/chemically modified samples show much better capacity retention at both 25 and 60°C than does the unmodified LiMn2O4 (41% fade in 100 cycles at 60°C). Among the various compositions investigated, the LiNi0.5Co0.5O2-modified sample shows superior capacity retention with only 2.8% fade in 100 cycles at 60°C with around 110 mAh/g. The Al2O3-modified sample shows a higher capacity of 130 mAh/g, but with a faster fade (16% in 100 cycles at 60°C). The Li0.75CoO2-modified sample shows the best combination of capacity (124 mAh/g) and retention (8% fade in 100 cycles at 60°C). The modified samples also exhibit better capacity retention after aging at 55°C at 60-70% depth of discharge.

Original languageEnglish (US)
JournalElectrochemical and Solid-State Letters
Volume5
Issue number7
DOIs
StatePublished - Jul 2002
Externally publishedYes

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electric batteries
Cathodes
lithium
cathodes
cycles
Oxides
ions
Aging of materials
Heat treatment
Processing
Chemical analysis
spinel
heat treatment
lithium manganese oxide
Lithium-ion batteries
oxides
spinell

ASJC Scopus subject areas

  • Electrochemistry
  • Materials Science(all)

Cite this

Surface/chemically modified LiMn2O4 cathodes for lithium-ion batteries. / Mada Kannan, Arunachala; Manthiram, A.

In: Electrochemical and Solid-State Letters, Vol. 5, No. 7, 07.2002.

Research output: Contribution to journalArticle

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abstract = "LiMn2O4 spinel oxide has been surface/chemically modified with LixCoO2, LiNi0.5Co0.5O2, Al2O3, and MgO using a chemical processing procedure followed by heat-treatment at 300-800°C. The surface/chemically modified samples show much better capacity retention at both 25 and 60°C than does the unmodified LiMn2O4 (41{\%} fade in 100 cycles at 60°C). Among the various compositions investigated, the LiNi0.5Co0.5O2-modified sample shows superior capacity retention with only 2.8{\%} fade in 100 cycles at 60°C with around 110 mAh/g. The Al2O3-modified sample shows a higher capacity of 130 mAh/g, but with a faster fade (16{\%} in 100 cycles at 60°C). The Li0.75CoO2-modified sample shows the best combination of capacity (124 mAh/g) and retention (8{\%} fade in 100 cycles at 60°C). The modified samples also exhibit better capacity retention after aging at 55°C at 60-70{\%} depth of discharge.",
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AB - LiMn2O4 spinel oxide has been surface/chemically modified with LixCoO2, LiNi0.5Co0.5O2, Al2O3, and MgO using a chemical processing procedure followed by heat-treatment at 300-800°C. The surface/chemically modified samples show much better capacity retention at both 25 and 60°C than does the unmodified LiMn2O4 (41% fade in 100 cycles at 60°C). Among the various compositions investigated, the LiNi0.5Co0.5O2-modified sample shows superior capacity retention with only 2.8% fade in 100 cycles at 60°C with around 110 mAh/g. The Al2O3-modified sample shows a higher capacity of 130 mAh/g, but with a faster fade (16% in 100 cycles at 60°C). The Li0.75CoO2-modified sample shows the best combination of capacity (124 mAh/g) and retention (8% fade in 100 cycles at 60°C). The modified samples also exhibit better capacity retention after aging at 55°C at 60-70% depth of discharge.

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