Surface-modification of LiMn2O4 with a silver-metal coating

Son, Jong‐Tae; Park, Kyusung; Kim, H. G.; Chung, Hyun Kyu

doi:10.1016/j.jpowsour.2003.07.010

Cited by 78 publications

(29 citation statements)

References 4 publications

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“…Zhou et al [30] reported that the initial discharge capacity was decreased with increasing the amount of Ag coating, but Ag (0.1)/LMO exhibits the highest discharge capacity after 40 cycles 108 mAh g −1 among all samples. Son et al [31] also reported that the silver-coated nanoparticle LMO (3.2 wt.% Ag) shows excellent cycleability at 2 C galvanostatic conditions. It can be concluded that the improved cycleability of metal coating LMO can be attributed to enhanced electron conduction between LMO particles because of the low resistance of silver and gold.…”

Section: Metalmentioning

confidence: 97%

A review of recent developments in the surface modification of LiMn2O4 as cathode material of power lithium-ion battery

Zhu

et al. 2009

Ionics

161

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LiMn 2 O 4 (LMO) is a very attractive choice as cathode material for power lithium-ion batteries due to its economical and environmental advantages. However, LiMn 2 O 4 in the 4-V region suffers from a poor cycling behavior. Recent research results confirm that modification by coating is an important method to achieve improved electrochemical performance of LMO, and the latest progress was reviewed in the paper. The surface treatment of LMO by coating oxides and nonoxide systems could decrease the surface area to retard the side reactions between the electrode and electrolyte and to further diminish the Mn dissolution during cycling test. At present, LiMn 2 O 4 is the mainstreaming cathode material of power lithium-ion battery, and, especially the modified LMO, is the trend of development of power lithium-ion battery cathode material in the long term.

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Section: Metalmentioning

confidence: 97%

A review of recent developments in the surface modification of LiMn2O4 as cathode material of power lithium-ion battery

Zhu

et al. 2009

Ionics

161

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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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“…For instance the nonmetals B [11], S [12], F [13], Br [14], and the metals Mg [15], Al [16], Ti [17], V, Cr [18], Co [19], Ni [20], Cu [21], Zn [22], Ga [23], Zr [24], Ru [25], Ag [26,27], Sn [28], Au [29], were used. The substitution increases the average oxidation state of Mn above 3.5, and hence, suppressing Jahn-Teller distortion, stabilizes the crystal structure of the spinel.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, effect of γ-ray and electrical conductivity of uranium doped nano LiMn2O4 spinels for applications as positive electrodes in Li-ion rechargeable batteries

El-Metwaly¹,

Abou-Sekkina

Saad

et al. 2014

Materials Science-Poland

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LiMn 2 O 4 is an attractive candidate cathode material for Li-ion rechargeable batteries, but it suffers from severe capacity fading, especially at higher temperature (55 • C) during charging/discharging processes. Recently, many attempts have been made to synthesize modified LiMn 2 O 4 . In this work, a new study on the synthesis of pure and U 4+ -doped nano lithium manganese oxide [LiMn 2−x U x O 4 , (x = 0.00, 0.01, 0.03)] via solid-state method was introduced. The synthesized LiMn 1.97 U 0.03 O 4 was irradiated by γ-radiation (10 and 30 kGy). The green samples and the resulting spinel products were characterized using thermogravimetric and differential thermal analysis (TG/DTA), X-ray diffraction (XRD), infrared (IR), and scanning electron microscopy (SEM) measurements. XRD and SEM studies revealed nano-sized particles in all prepared samples. Direct-current (DC) electrical conductivity measurements indicated that these samples are semiconductors and the activation energies decrease with increasing rare-earth U 4+ content and γ-irradiation. ∆E a equals to 0.304 eV for LiMn 1.99 U 0.01 O 4 , ∆E a is 0.282 eV for LiMn 1.97 U 0.03 O 4 and decreases to ∆E a = 0.262 eV for γ-irradiated LiMn 1.97 U 0.03 O 4 nano spinel. The data obtained for the investigated samples increase their attractiveness in modern electronic technology.

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Surface-modification of LiMn2O4 with a silver-metal coating

Cited by 78 publications

References 4 publications

A review of recent developments in the surface modification of LiMn2O4 as cathode material of power lithium-ion battery

A review of recent developments in the surface modification of LiMn2O4 as cathode material of power lithium-ion battery

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

Synthesis, effect of γ-ray and electrical conductivity of uranium doped nano LiMn2O4 spinels for applications as positive electrodes in Li-ion rechargeable batteries

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