Influence of Y3+ doping on structure and electrochemical property of the LiMn2O4

Xu, Cha-qing; Yan-wen, Tian; Zhai, Yuchun; Liu, L.Y.

doi:10.1016/j.matchemphys.2005.09.089

Cited by 25 publications

(9 citation statements)

References 19 publications

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“…The common raw materials used are carbonates [22,78], acetates [79], nitrates [44,71], sulfates [80], hydroxides [73], oxides [81] of Li, Mn and the doped-ion. The preparation processes are various.…”

Section: Other Methodssupporting

confidence: 89%

“…Some [78][79][80] first synthesized a precursor, then reacted it with other raw materials to obtain the target product. Some [62,81] mixed all the raw materials at once and then reacted them together. The differences of the process may influence the morphology, particle size, and therefore the electrochemical performance to a great extent [80].…”

Section: Other Methodsmentioning

confidence: 99%

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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: Other Methodssupporting

confidence: 89%

Section: Other Methodsmentioning

confidence: 99%

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

et al. 2013

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“…Note that the YF 3 coating did not change shapes and positions of the peaks. It has been reported that substitution of Y 3+ for Mn 3+ in LiMn 2 O 4 by doping results in a decrease of lattice constant [19]. In this case, there are no significant changes in lattice constant and unit cell volume, indicating that YF 3 was only coated on the surface of LiMn 2 O 4 particles rather than penetrated into the spinel lattice.…”

Section: Resultsmentioning

confidence: 78%

Synthesis and electrochemical performance of YF3-coated LiMn2O4 cathode materials for Li-ion batteries

Cao

et al. 2011

Rare Metals

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Spinel LiMn 2 O 4 cathodes were coated with 1 mol% YF 3 . X-ray diffraction (XRD) analyses showed that Y and/or F did not enter the lattice of the LiMn 2 O 4 crystal. Transmission electron microscopy (TEM) showed that a compact YF 3 layer of 5-20 nm in thickness was coated onto the surface of LiMn 2 O 4 particles. Scanning electron microscopy (SEM) observation showed that the YF 3 coating caused the agglomeration of LiMn 2 O 4 particles. The cycling test demonstrated that the YF 3 coating can improve the electrochemical performance of LiMn 2 O 4 at both 20 and 55°C. Moreover, YF 3 -coated LiMn 2 O 4 exhibited an improved rate capability compared with the uncoated one at high rates over 5C. The immersion test in electrolytes showed that YF 3 -coated LiMn 2 O 4 is more erosion resistant than the uncoated one.

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“…However, a key problem limiting the marketing of batteries based on LiMn 2 O 4 is the severe electrochemical capacity loss during cycling 6 . Two main factors are cited for causing the gradual capacity loss of LiMn 2 O 4 : the JahnTeller distortion [7][8][9][10][11] and the dissolution of manganese to Mn 2+ from surface particles into the electrolyte [12][13][14][15][16] . The morphology and surface area of the particles has a profound effect on the electrochemical properties of a material.…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF THE AMOUNT OF WATER ON THE SYNTHESIS OF LiMn2O4, USED AS CATHODE MATERIAL IN LITHIUM-ION BATTERIES

Herrera

Yedinak

Cabellero

et al. 2015

J. Chil. Chem. Soc.

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LiMn 2 O 4 with nanostructured morphologies possess rapid kinetics which is favorable for the intercalation of lithium ions in battery electrodes 1 . In this work, we have studied the effect of varying the amount of water in the hydrothermal synthesis of nanostructured LiMn 2 O 4 spinel. It was found that three distinct nanostructured morphologies of this compound are obtained when the volume of water used during the synthesis is varied. The powders were morphologically and structurally characterized using TEM, XRD, and BET yielding particle sizes ranging from 1 to 50 nm, with 90 % of the sample possessing a particle size of 21.7 nm. X-ray diffraction analysis show characteristic peaks and confirm the compound's identity and crystalline structure. Furthermore, the electrochemical behavior of this material in lithium ion batteries was studied. The results indicate that the electrochemical performance is strongly influenced by the size and shape of the α-LiMn 2 O 4 nanoparticles.

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Influence of Y3+ doping on structure and electrochemical property of the LiMn2O4

Cited by 25 publications

References 19 publications

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

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

Synthesis and electrochemical performance of YF3-coated LiMn2O4 cathode materials for Li-ion batteries

EFFECT OF THE AMOUNT OF WATER ON THE SYNTHESIS OF LiMn2O4, USED AS CATHODE MATERIAL IN LITHIUM-ION BATTERIES

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