Significant improvement of high voltage cycling behavior AlF3-coated LiCoO2 cathode

Sun, Yang Kook; Han, Jae-Il; Myung, Seung‐Taek; Lee, S.-W.; Amine, Khalil

doi:10.1016/j.elecom.2006.03.040

Cited by 249 publications

(95 citation statements)

References 9 publications

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“…Obviously, the R ct of the N-Ni-LVO electrode (72 X) is smaller than that of the A-Ni-LVO electrode (88 X). Such suppressed semicircle is considered as an important factor for the improvement of the active materials [43,44]. Apparently, the sample annealed in nitrogen suppresses the charge-transfer resistance, thus resulting in improved electrochemical properties.…”

Section: Electrochemical Performancementioning

confidence: 98%

The effect of nitrogen annealing on lithium ion intercalation in nickel-doped lithium trivanadate

et al. 2016

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Section: Electrochemical Performancementioning

confidence: 98%

The effect of nitrogen annealing on lithium ion intercalation in nickel-doped lithium trivanadate

et al. 2016

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“…At the same time, modifying the surface of the LiCoO 2 particle may be helpful to suppress the release of oxygen, which always leads to instability of the interior structure and decomposition of the electrolyte [36]. Besides ZrO 2 and Al 2 O 3 , other coating strategies include AlPO 4 [37], AlF 3 [38] and MgO [36] etc. Moreover doping such as Mg [39,40], Al [40] and Ti/Mg double substitution [41] is also demonstrated as another effective method to improve its cycleability for high voltage application.…”

Section: Layered Licoo 2 Compoundsmentioning

confidence: 98%

Layered and Spinel Structural Cathodes

Lyu

Huang

2015

Rechargeable Batteries

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Layered and spinel materials have been used successfully as intercalation-type cathode active materials in commercial Li-ion batteries. The physical and chemical properties, electrochemical reactions, structure evolution mechanisms, stability and safety issues have been widely investigated. Based on comprehensive fundamental researches, since 1980s, their electrochemical performances are improved continuous after various modifications, such as doping, surface coating, forming solid solution and composite, controlling morphology, size and crystallinity. Here, basic features of layered and spinel materials are summarized.

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“…Unfortunately, the coated metal oxides are unstable against the corrosion of HF and can be converted to more stable metal fluorides. Recently, some metal fluorides were used as coating materials for cathodes to resist the HF attack [17][18].…”

Section: Introductionmentioning

confidence: 99%

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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Significant improvement of high voltage cycling behavior AlF3-coated LiCoO2 cathode

Cited by 249 publications

References 9 publications

The effect of nitrogen annealing on lithium ion intercalation in nickel-doped lithium trivanadate

The effect of nitrogen annealing on lithium ion intercalation in nickel-doped lithium trivanadate

Layered and Spinel Structural Cathodes

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

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