Chemistry and Electrochemistry of Low-Temperature Manganese Oxides as Lithium Intercalation Compounds

Franger, Sylvain; Bach, S.; Pereira-Ramos, J.P.; Baffier, N.

doi:10.1149/1.1393887

Cited by 31 publications

(19 citation statements)

References 25 publications

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“…Z = 3.77 for the undoped compound while 3.7 < Z < 3.74 for the Co-doped materials. As previously reported for the undoped material (Fig 3), the heat-treatment at 600 ~ instead of 300 ~ unam biguously leads to a well cristallized cubic phase (a = 8.2] ,~) which confirms manganese ions are substituted b 3 cobalt ions in the core structure [22] The first two discharge-charge cycles of the Co-doped birnessite are reported in Fig. 9.…”

Section: Synthesis the Sol-gel Birnessitesupporting

confidence: 77%

“…This promising result prompted us to evaluate the effect of the Co-substitution on two lamellar phases we already investigated as rechargeable cathodic materials (i) the lithiated oxide Li0.4sMnO2+a (0.1 < 5 < 0.125) prepared through an ion-exchange procedure from the sol-gel lamellar compound Nao.45MnO 2 [22] (ii) the sol-gel birnessite MnO1.84 0.6.H20 [11]. In this work we report on the synthesis of their Co-doped forms and the impact provided on their electrochemical behaviour.…”

Section: Introductionmentioning

confidence: 99%

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Influence of cobalt ions on the electrochemical properties of lamellar manganese oxides

Franger

Bach

Pereira-Ramos

et al. 2000

Ionics

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Abstract. Evaluation of Co-doping on the electrochemical properties of the sol-gel birnessite and the new lithiated manganese oxide Li0.45MnO2+ 5 is reported. For both compounds the synthesis of Co-doped materials via a solution technique is described. We demonstrate the interest of Co-doped structures with the selected content of 0.15 Co per mole of oxide as the optimum composition. In the case of Li0.45Mnl_yCOyO2+ 8, prepared at 300 ~ a mixture of a lamellar phase and a cubic one is identified while the Co-doped birnessite appears as a single phase. A probable substitution of Mn by Co ions explains the better specific capacity of 185 mAh/g found and the excellent stability observed over 40 cycles in the voltage range 4.2-2.0 V.

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Section: Synthesis the Sol-gel Birnessitesupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Influence of cobalt ions on the electrochemical properties of lamellar manganese oxides

Franger

Bach

Pereira-Ramos

et al. 2000

Ionics

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“…The layered LiM x Mn 1−x O 2 cathodes have demonstrated a capacity between 150-200 mAh/g over more than 200 cycles. [24][25][26] Since manganese oxides are low in cost and are an abundant resource, it is expected that in the future, LiM x Mn 1−x O 2 will replace LiCoO 2 as cathode material in lithium-ion batteries. Layered LiM x Mn 1−x O 2 also provides the possibility to build large-scale rechargeable lithium-ion batteries for electric vehicles and stationary energy storage.…”

Section: Introductionmentioning

confidence: 99%

Nanomaterials for Lithium-ion Rechargeable Batteries

Liu¹,

Wang²,

Guo³

et al. 2006

j nanosci nanotechnol

116

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In lithium-ion batteries, nanocrystalline intermetallic alloys, nanosized composite materials, carbon nanotubes, and nanosized transition-metal oxides are all promising new anode materials, while nanosized LiCoO2, LiFePO4, LiMn2O4, and LiMn2O4 show higher capacity and better cycle life as cathode materials than their usual larger-particle equivalents. The addition of nanosized metal-oxide powders to polymer electrolyte improves the performance of the polymer electrolyte for all solid-state lithium rechargeable batteries. To meet the challenge of global warming, a new generation of lithium rechargeable batteries with excellent safety, reliability, and cycling life is needed, i.e., not only for applications in consumer electronics, but especially for clean energy storage and for use in hybrid electric vehicles and aerospace. Nanomaterials and nanotechnologies can lead to a new generation of lithium secondary batteries. The aim of this paper is to review the recent developments on nanomaterials and nanotechniques used for anode, cathode, and electrolyte materials, the impact of nanomaterials on the performance of lithium batteries, and the modes of action of the nanomaterials in lithium rechargeable batteries.

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“…However, these synthetic methodologies have led to powders with large size and less controlled morphology. 151,162 LiMn 1.8 Co 0.2 O 4 nanoparticles (20-34 nm) were prepared via reverse micelle process, 163 followed by calcination. The smallest particles were obtained using water to oil ratio (W/O) around 1/5 and cathodes using these nanoparticles have shown excellent cyclability and good capacity (160 mA h g -1 ).…”

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confidence: 99%

Cathodes for lithium ion batteries: the benefits of using nanostructured materials

Camilo¹,

Torresi²

2006

J. Braz. Chem. Soc.

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As celas de íon lítio disponíveis comercialmente, as quais são as mais avançadas entre as baterias recarregáveis disponíveis até agora, empregam óxidos de metais de transição microcristalinos como catodos, os quais funcionam como matrizes de inserção de lítio. Em busca por uma melhor performance eletroquímica, o uso de nanomateriais no lugar dos materiais convencionais tem emergido como excelente alternativa. Nesta revisão nós apresentaremos uma breve introdução sobre as motivações de usar materiais nanoestruturados como catodos em baterias de íon-lítio. Para ilustrar tais vantagens apresentamos exemplos de pesquisas relacionadas com a preparação e dados eletroquímicos dos mais usados catodos em nanoescala, tais como LiCoO 2 , LiMn 2 O 4 , LiMnO 2 , LiV 2 O 5 e LiFePO 4 .Commercially available lithium ion cells, which are the most advanced among rechargeable batteries available so far, employ microcrystalline transition metal oxides as cathodes, which function as Li insertion hosts. In search for better electrochemical performance the use of nanomaterials in place of these conventional ones has emerged as excellent alternative. In this review we present a brief introduction about the motivations to use nanostructured materials as cathodes in lithium ion batteries. To illustrate such advantages we present some examples of research directed toward preparations and electrochemical data of the most used cathodes in nanoscale, such as LiCoO 2 , LiMn 2 O 4 , LiMnO 2 , LiV 2 O 5 e LiFePO 4 .Keywords: nanotechnology, lithium-ion battery, cathode, nanoparticles Initial RemarksSince Sony introduced its 18650 cell in 1990, 1 Li-ion batteries with excellent electrochemical performance have been manufactured and occupied a prime position in the market place 2 to power portable and non-portable devices. [3][4][5] The reason for this relevance is that compared to traditional rechargeable batteries such as, lead acid and Ni-Cd, the lithium-ion battery shows several advantages, such as lighter in weight, smaller in dimension and higher energy density. 1 Moreover, although capacity values may be similar to other rechargeable systems, voltages are approximately three times higher, affording higher energy. 1 In general, the commercial lithium-ion batteries use graphite-lithium composite, Li x C 6 , as anode, lithium cobalt oxide, LiCoO 2 , as cathode and a lithium-ion conducting electrolyte. When the cell is charged, lithium is extracted from the cathode and inserted at the anode. On discharge, the lithium ions are released by the anode and taken up again by the cathode (Figure 1).Owing to the importance of lithium ion batteries, these cells are still object of intense research to enhance their properties and characteristics. The searches focus on all aspects of these batteries, including improved anodes, 6-8 cathodes 9-17 and electrolytes. [18][19][20][21][22] However, most of these efforts are concentrated in new cathode materials, since the most used cathode material (LiCoO 2 ) is expensive and is somewhat toxic.The active catho...

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Chemistry and Electrochemistry of Low-Temperature Manganese Oxides as Lithium Intercalation Compounds

Abstract: Results and DiscussionThe synthesis procedure of lithiated manganese oxides is summarized in Fig. 1. Three main synthesis steps are required. Each step

Cited by 31 publications

References 25 publications

Influence of cobalt ions on the electrochemical properties of lamellar manganese oxides

Influence of cobalt ions on the electrochemical properties of lamellar manganese oxides

Nanomaterials for Lithium-ion Rechargeable Batteries

Cathodes for lithium ion batteries: the benefits of using nanostructured materials

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