Improvement of electrochemical stability of LiMn2O4 by CeO2 coating for lithium-ion batteries

Ha, Hyung Wook; Yun, Nan Ji; Kim, Keon

doi:10.1016/j.electacta.2006.09.066

Cited by 159 publications

(85 citation statements)

References 26 publications

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“…But in the process of charging and discharging, the capacity of pure lithium manganese oxide will decay due to several factors such as Jahn-Teller distortion occurring on the surface of the particles and manganese dissolution into the electrolyte, especially at elevated temperatures. To overcome these drawbacks, two strategies were mainly pursued: elements substitution or oxygen excess to increase the oxidation state of Mn for suppressing the Jahn-Teller effect and surface modification or coating for suppressing the dissolution of manganese into the electrolyte [4][5][6][7][8][9][10][11][12][13][14][15][16]. The substitutions of rare earth elements for partial Mn in LiMn 2 O 4 are attracting the attention of some researchers.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of rare-earth doped LiMn2O4 spinel cathode materials for Li-ion rechargeable battery

Sun

Chen

et al. 2011

J Solid State Electrochem

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Spinel powders of LiMn 2−x RE x O 4 (RE = La, Ce, Nd, Sm; 0≤x≤0.1) have been synthesized by solid-phase reaction. The structure and electrochemical properties of these electrode materials were characterized by X-ray diffraction (XRD), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge-discharge experiment. The part substitution of rare-earth element RE for Mn in LiMn 2 O 4 decreases the lattice parameter, resulting in the improvement of structural stability, and decreases the charge transfer resistance during the electrochemical process of LiMn 2 O 4 . As a result, the cycle ability, 55°C high-temperature and high-rate performances of LiMn 2−x RE x O 4 electrode materials are significantly improved with increasing RE addition, compared to the pristine LiMn 2 O 4 .

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Section: Introductionmentioning

confidence: 99%

Electrochemical performance of rare-earth doped LiMn2O4 spinel cathode materials for Li-ion rechargeable battery

Sun

Chen

et al. 2011

J Solid State Electrochem

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“…Besides, various modification approaches had been applied in for this target. One of the approaches was substituting a small fraction of the manganese-ions with several divalent or trivalent metal ions in the 16d sites [15][16][17], the other one was surface coating layer by metal oxides to avoid Mn dissolution [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Improved performances of mechanical-activated LiMn2O4/MWNTs cathode for aqueous rechargeable lithium batteries

Chen

et al. 2009

J Appl Electrochem

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LiMn 2 O 4 /multi-walled carbon nanotubes (MWNTs) composite was synthesized by mechanical activation reaction followed by a heat-treatment (500°C). The LiMn 2 O 4 and LiMn 2 O 4 /MWNTs as cathodes were investigated in 1 M Li 2 SO 4 by cyclic voltammetry (CV), galvanostatic charge/discharge (GC), and electrochemical impedance spectroscopy (EIS). The LiMn 2 O 4 /MWNTs cathode delivered higher discharge capacity (117 mAh g -1 ) than LiMn 2 O 4 (84.6 mAh g -1 ). Furthermore, the results from EIS showed that LiMn 2 O 4 /MWNTs had a faster kinetic process for lithium ion intercalation/de-intercalation than LiMn 2 O 4 . Besides, LiMn 2 O 4 /MWNTs had better cycling stability and rate capability than LiMn 2 O 4 , which was confirmed by GC testing. SEM images showed that a threedimensional network structure was formed during the mechanical activation, giving a decrease of particle size.

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“…For instance, the nonmetals B [10][11][12], F [13][14][15], S [16], Br [17], the general metals Mg [18], Al [19], Ti [20,21], Cr [22,23], Fe [24], Co [19,[25][26][27], Ni [28], Cu [29], Zn [30][31][32], Ga [33], Zr [34], Ru [35], Ag [36,37], Sn [38], Au [39], the rare-earth metals La [40], Ce [41], Pr [42], Nd [43], Sm [44], Gd [45], and the actinide dopants Th [46], U [47]. Some researchers have also modified LiMn 2 O 4 with surface coating [48][49][50][51][52] electrolyte modification [53], laser annealing [54], pulsed laser deposition [55], process optimization …”

Section: Open Accessmentioning

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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Improvement of electrochemical stability of LiMn2O4 by CeO2 coating for lithium-ion batteries

Cited by 159 publications

References 26 publications

Electrochemical performance of rare-earth doped LiMn2O4 spinel cathode materials for Li-ion rechargeable battery

Electrochemical performance of rare-earth doped LiMn2O4 spinel cathode materials for Li-ion rechargeable battery

Improved performances of mechanical-activated LiMn2O4/MWNTs cathode for aqueous rechargeable lithium batteries

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

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