Effect of Co doping in LiMn2O4

Shen, C. H.; Liu, Ru‐Shi; Gundakaram, R.; Chen, J.M.; Huang, Songtao; Chen, J.S.; Wang, C.M.

doi:10.1016/s0378-7753(01)00765-0

Cited by 47 publications

(18 citation statements)

References 31 publications

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“…The products, for example, the reported Li(Mn 2−x Co x )O 4 (0 ≤ x ≤ 0.5) [64] [66] just had small cell parameter changes in the lattice, and these were good for the stability of the structure and the improvement of the cycle life. Solid state reactions can be classified as dry-solid state reactions and wet-milling methods according to the differences of the pretreatment.…”

Section: Solid State Reactionmentioning

confidence: 99%

Preparation and Doping Mode of Doped LiMn2O4 for Li-Ion Batteries

et al. 2013

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Spinel LiMn 2 O 4 is an appealing candidate cathode material for Li-ion rechargeable batteries, but it suffers from severe capacity fading, especially at higher temperature (55 °C) during discharging/charging. In recent years, many attempts have been made to synthesize modified LiMn 2 O 4 . This paper reviews the recent research on the preparation and doping modes of doped LiMn 2 O 4 for modifying the LiMn 2 O 4. We firstly compared preparation methods for doped spinel LiMn 2 O 4 , such as solid state reactions and solution synthetic methods. Then we mainly discuss doping modes reported in recent years, such as bulk doping, surface doping and combined doping. A comparison of different doping modes is also provided. The research shows that the multiple-ion doping and combined doping modes of LiMn 2 O 4 used in Li-ion battery are excellent for improving different aspects of the electrochemical performance which holds great promise in the future. From this paper, we also can see that spinel LiMnO 4 as an attractive candidate cathode material for Li-ion batteries.

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Section: Solid State Reactionmentioning

confidence: 99%

Preparation and Doping Mode of Doped LiMn2O4 for Li-Ion Batteries

et al. 2013

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“…The initial discharge capacity of LiMn 1.8 Co 0.2 O 4 spinels was 103 mA h/g, which was just higher than that of LiMn 1.84 Co 0.16 O 4 , but they were lower than that of the parent LiMn 2 O 4 . (The initial discharge capacity of Li/LiMn 2 O 4 was 120 mA h/g [35], as shown in Table 1.) It can be seen that two voltage plateaus appeared on charge curve as well as on discharge curve at about 3.9 and 4.1 V, respectively.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Preparation and characterization of LiMn2−yCoyO4 spinels by low heating solid state coordination method

Huang

Jia

2005

Journal of Colloid and Interface Science

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“…The material, however, suffers from the problem of electrochemical capacity loss over repeated cycling, which is circumvented by doping at the Mn site with other transition metal atoms [8]. By a trial and error approach, it is established that among the doped variants, the cobalt doped spinel LiCo y Mn 2−y O 4 with doping level between 0.1 and 0.2 is ideal for enhanced battery performance [9][10][11][12][13]. However, to the best of our knowledge, no clear correlation has been made between battery performance and basic physics related phenomena such as structural phase transitions, anomalies in transport and heat capacity, etc.…”

Section: Introductionmentioning

confidence: 99%

Correlation between battery material performance and cooperative electron-phonon interaction in LiCoyMn2-yO4

Ragavendran

Mandal

Yarlagadda

2017

Applied Physics Letters

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Understanding the basic physics related to archetypal lithium battery material (such as LiCoyMn2−yO4) is of considerable interest and is expected to aid designing of cathodes of high capacity. The relation between electrochemical performance, activated-transport parameters, thermal expansion, and cooperativity of electron-phonon-interaction distortions in LiCoyMn2−yO4 is investigated. The first order cooperative-normal-mode transition, detected through coefficient of thermal expansion, is found to disappear at a critical doping (y ∼ 0.16); interestingly, for y > ∼ 0.16 the resistivity does not change much with doping and the electrochemical capacity becomes constant over repeated cycling. The critical doping y ∼ 0.16 results in breakdown of the network of cooperative/coherent normal-mode distortions; this leads to vanishing of the first-order transition, establishment of hopping channels with lower resistance, and enhancing lithiation and delithiation of the battery, thereby minimizing electrochemical capacity fading.

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Effect of Co doping in LiMn2O4

Cited by 47 publications

References 31 publications

Preparation and Doping Mode of Doped LiMn2O4 for Li-Ion Batteries

Preparation and Doping Mode of Doped LiMn2O4 for Li-Ion Batteries

Preparation and characterization of LiMn2−yCoyO4 spinels by low heating solid state coordination method

Correlation between battery material performance and cooperative electron-phonon interaction in LiCoyMn2-yO4

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