Structural and electrochemical analysis of layered compounds from Li2MnO3

Johnson, Christopher; Корте, Ш.; Vaughey, John T.; Thackeray, Michael M.; Bofinger, T.E.; Shao‐Horn, Yang; Hackney, S.A.

doi:10.1016/s0378-7753(99)00248-7

Cited by 76 publications

(58 citation statements)

References 14 publications

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“…53 Cycling performance, rate capability and impedance evolution of the electrodes were investigated. Structural changes occurring due to cycling were evaluated by XRD, Raman spectroscopy and 7 Li magic angle spinning NMR techniques. The XRD pattern of the composite after repeated cycling indicated that the reflections related to Li 2 MnO 3 component disappeared and the intensity of the main (003) reflection decreased substantially.…”

Section: 51mentioning

confidence: 99%

“…Nevertheless, several publications have appeared with different procedures for activation of Li 2 MnO 3 and with varying capacity values. [5][6][7][8][9][10][11][12][13][14] The initial discharge capacity values are generally high for the activated phases of Li 2 MnO 3 , but cycling instability is observed in all reports. In order to enhance the cycling stability, composites of Li 2 MnO 3 with other layered lithiated transition metal oxides such as LiCoO 2 are studied.…”

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confidence: 99%

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Composite of Li-Rich Mn, Ni and Fe Oxides as Positive Electrode Materials for Li-Ion Battery

Penki

Duraisamy

Kishore

et al. 2016

J. Electrochem. Soc.

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A porous layered composite of Li 2 MnO 3 and LiMn 1/3 Ni 1/3 Fe 1/3 O 2 (composition: Li 1.2 Mn 0.53 Ni 0.13 Fe 0.13 O 2 ) is prepared by reverse microemulsion method employing tri-block co-polymer, F068 as a soft-polymer template. The Co-free composite is studied as a cathode material for Li-ion battery. Several samples are prepared by heating the precursor in the temperature range between 500 and 900 • C. The N 2 adsorption/desorption studies reveal that the product samples possess mesoporosity with broadly distributed pores around 15-50 nm diameter. Pore volume and surface area decrease by increasing the temperature of preparation. Charge-discharge, cycling and rate capability are investigated. The discharge capacity of the sample prepared at 900 • C is about 170 mAh g −1 at a specific current of 25 mA g −1 with a good cycling stability. A value of 140 mAh g −1 is obtained at the end of 50 charge-discharge cycles. Discharge capacity of 91 mAh g −1 is obtained at a specific current of 206 mA g −1 . A high rate capacity of the composite is attributed to its porous nature. Research activities on lithium-ion batteries have increased in the recent past because of their attractive energy density. [1][2][3] In an extended range of applications, they are successful in small sizes at present and anticipated to be useful in large sizes for applications such as electric vehicles. Although the energy density of the present Li-ion batteries is the greatest among rechargeable batteries, future requirements such as electric vehicle applications require still greater energy density. The next generation Li-ion batteries, thus, need novel electrode materials which can provide greater discharge capacity than the present materials. Compounds with a high atomic ratio of extractable lithium to transition metal are expected to provide high discharge capacity values. Li 2 MnO 3 belongs to this category of materials.4 Li 2 MnO 3 is a layered oxide similar to LiCoO 2 and its formula can also be presented as Li (Li 0.33 was reported at a specific current of 30 mA g −1 in the potential range between 1.5 and 4.8 V. 33,34 In addition to the high discharge capacity, an electrode material needs to possess high rate capability for the purpose of fast charge or/and discharge. Porous materials are expected to possess high rate capability because the electrolyte can creep into particles and enhance the contact area. 35 As a result, the material can withstand an enhanced specific current during charge-discharge cycling. Furthermore, the electrode material can tolerate volume expansion and contraction that may occur during charge-discharge processes. To the best of authors' knowledge, there are only few reports available on the synthesis of porous composites of Li 2 MnO 3 . A porous composite of Li 2 MnO 3 with nanoplate morphology was prepared via colloidal crystal template of poly(methyl methacrylate) beads. The porous composite was better in electrochemical properties in relation to the nonporous composite. 36,37 Investigations on high capa...

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Section: 51mentioning

confidence: 99%

mentioning

confidence: 99%

Composite of Li-Rich Mn, Ni and Fe Oxides as Positive Electrode Materials for Li-Ion Battery

Penki

Duraisamy

Kishore

et al. 2016

J. Electrochem. Soc.

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show abstract

“…A higher voltage candidate with a larger capacity is demanded to meet the requirements to satisfy the new energy storage systems [1e4]. Li 2 MnO 3 has a theoretical capacity of 458 mAh g À1 operating above 4.5 V, in case all the lithium ions are utilized [5,6]. Li 2 MnO 3 is believed to be electrochemically inactive because Mn has a valence of þ4 and unlikely goes to a higher valence [7].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of layered–layered xLi2MnO3·(1−x)LiMO2 (M = Mn, Ni, Co) nanocomposite electrodes materials by mechanochemical process

Kim

Noh

et al. 2012

Journal of Power Sources

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“…To emerge electrochemical activity of Li 2 MnO 3 , reducing particle size and oxygen removal are necessary due to its low ionic and electronic conductivities. Li 2 MnO 3 also showed poor cycling performance, which is attributed to the structural transition from layered structure to spinel-like structure [2,3,12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, phase relation and electrical and electrochemical properties of ruthenium-substituted Li2MnO3 as a novel cathode material

Mori

Sakaebe

Shikano

et al. 2011

Journal of Power Sources

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Structural and electrochemical analysis of layered compounds from Li2MnO3

Cited by 76 publications

References 14 publications

Composite of Li-Rich Mn, Ni and Fe Oxides as Positive Electrode Materials for Li-Ion Battery

Composite of Li-Rich Mn, Ni and Fe Oxides as Positive Electrode Materials for Li-Ion Battery

Synthesis of layered–layered xLi2MnO3·(1−x)LiMO2 (M = Mn, Ni, Co) nanocomposite electrodes materials by mechanochemical process

Synthesis, phase relation and electrical and electrochemical properties of ruthenium-substituted Li2MnO3 as a novel cathode material

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