Effects of surface modification by MgO on interfacial reactions of lithium cobalt oxide thin film electrode

Iriyama, Yasutoshi; Kurita, Hisaka; Yamada, Izumi; Abe, Takeshi; Ogumi, Zempachi

doi:10.1016/j.jpowsour.2004.05.029

Cited by 97 publications

(52 citation statements)

References 16 publications

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“…The observed main arcs correspond to the resistance of the interfacial reaction between the LiCoO 2 electrode and the electrolyte. 23 For the uncoated-LCO, the small arc observed at 4.0 V is drastically enlarged at 4.4 V. This result indicates that an inactive layer is formed on LiCoO 2 due to surface degradation. 17 For the RT-MgO-LCO, the resistance is much greater than that of the uncoated-LCO at first.…”

Section: (D)mentioning

confidence: 88%

“…20 However, different morphologies of MgO coating layer have been reported by other research group. 6,[21][22][23][24] In order to examine the morphology effect, we prepared two types of MgO coated-LiCoO 2 thin film electrodes at room temperature and high temperature. The stability at high potential cycling was investigated by electrochemical measurements.…”

Section: Introductionmentioning

confidence: 99%

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Stabilization of the Electronic Structure at the Cathode/Electrolyte Interface via MgO Ultra-thin Layer during Lithium-ions Insertion/Extraction

et al. 2014

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Degradation mechanism of surface coating effects at the cathode/electrolyte interface is investigated using thinfilm model electrodes combined with operando X-ray absorption spectroscopy (XAS). MgO-coated LiCoO 2 thin-film electrodes prepared via pulsed laser deposition at room temperature and high temperature are used as model systems. The MgO coating improves the durability of the cathode during high-potential cycling. Operando total reflection fluorescence XAS reveals that initial deterioration due to reduction of Co ions at the surface of the uncoated-LiCoO 2 thin film upon electrolyte immersion is inhibited by the MgO coating. Operando depth-resolved XAS reveals that the MgO coating suppresses drastic distortions of local structure at the LiCoO 2 surface as observed in the uncoated-LiCoO 2 during charging process. The electronic and local structure changes at the electrode/ electrolyte interface for two types of surface coating morphologies are discussed.

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Section: (D)mentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Stabilization of the Electronic Structure at the Cathode/Electrolyte Interface via MgO Ultra-thin Layer during Lithium-ions Insertion/Extraction

et al. 2014

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“…Some oxides such as ZnO [1,2], MgO [3], Al 2 O 3 [4][5][6][7], TiO 2 [8], SnO 2 [9], ZrO 2 [10][11][12], B 2 O 3 [13] and other materials like LiFePO 4 [14], LiMn 2 O 4 [15], AlPO 4 [16][17][18][19], MgAl 2 O 4 [20] and carbon [21] have been reported to be coated on the surface of LiCoO 2 . Some coating materials exhibit special properties, for example, the coating layer of LiFePO 4 can improve cycle performance of LiCoO 2 at high temperature of 60 • C [15], while the Al 2 O 3 -coating layer can inhibit the erosion on LiCoO 2 caused by electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Study of electrochemical properties of coating ZrO2 on LiCoO2

Liu

Kuo

Liu

et al. 2010

Journal of Alloys and Compounds

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“…Among them, the enhancement of rate performance and the improvement of safety are critical issues. We have focused on lithium-ion transfer at the electrode/electrolyte interface and found that there are large activation barriers for the transfer of lithium ion at the interface [1][2][3][4][5][6][7][8][9][10]. Based on our results thus far, we have proposed a design for lithium-ion batteries with high rate-performance.…”

Section: Introductionmentioning

confidence: 92%

Lithium-ion transfer between Li_xCoO₂and polymer gel electrolytes

Yamada

Iriyama

Abe

et al. 2006

Science and Technology of Advanced Materials

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Lithium-ion transfer at the interface between Li x CoO 2 electrodes and polyvinylidene fluoride (PVdF)-based polymer gel electrolytes was studied by AC impedance spectroscopy. In addition to a conventional LiCoO 2 composite electrode, LiCoO 2 thin films were prepared by pulsed laser deposition. For both the composite and thin film electrodes, the impedance ascribed to lithium-ion transfer through the interface, i.e., charge transfer resistance, was observed in the mid-to-lower-frequency regions in Nyquist plots. The charge transfer resistance decreased in the initial stage of charging up to about 3.9 V vs. Li/Li + and then increased from about 4 V. The charge transfer resistances for LiCoO 2 thin film electrodes were much greater than those for LiCoO 2 composite electrodes due to their small reaction area. Based on these results, the design of thin film lithium-ion batteries using polymer gel electrolytes is discussed.

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Effects of surface modification by MgO on interfacial reactions of lithium cobalt oxide thin film electrode

Cited by 97 publications

References 16 publications

Stabilization of the Electronic Structure at the Cathode/Electrolyte Interface via MgO Ultra-thin Layer during Lithium-ions Insertion/Extraction

Stabilization of the Electronic Structure at the Cathode/Electrolyte Interface via MgO Ultra-thin Layer during Lithium-ions Insertion/Extraction

Study of electrochemical properties of coating ZrO2 on LiCoO2

Lithium-ion transfer between Li_xCoO₂and polymer gel electrolytes

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Effects of surface modification by MgO on interfacial reactions of lithium cobalt oxide thin film electrode

Cited by 97 publications

References 16 publications

Stabilization of the Electronic Structure at the Cathode/Electrolyte Interface via MgO Ultra-thin Layer during Lithium-ions Insertion/Extraction

Stabilization of the Electronic Structure at the Cathode/Electrolyte Interface via MgO Ultra-thin Layer during Lithium-ions Insertion/Extraction

Study of electrochemical properties of coating ZrO2 on LiCoO2

Lithium-ion transfer between LixCoO2and polymer gel electrolytes

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Lithium-ion transfer between Li_xCoO₂and polymer gel electrolytes