Electrochemical properties of LiCoO 2 thin film surface modified by lithium tantalate and lithium niobate coatings

Kato, Mikiko; Hayashi, Tetsutaro; Hasegawa, Gen; Lü, Xiaoli; Miyazaki, Takamichi; Matsuda, Yusuke; Kuwata, Naoaki; Kurihara, Koji; Kawamura, Junichi

doi:10.1016/j.ssi.2017.05.008

Cited by 29 publications

(35 citation statements)

References 31 publications

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“…Recent studies report on the improved electrochemical behavior of surface-modified LCO films using lithium tantalate (LTaO) and lithium niobite (LNbO). Coating with LNbO preserves the LCO surface and decreases the interfacial resistance, which indicates fast lithium transport [82]. LCO films modified by amorphous tungsten oxide (LWO) fabricated by PLD show a high capacity retention of Q r = 80% at a high rate of 20C, against Q r = 0% for bare LCO films cycled at the same C-rate.…”

Section: Licoo 2 (Lco)mentioning

confidence: 99%

Pulsed Laser Deposited Films for Microbatteries

Julien

Mauger

2019

Coatings

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This review article presents a survey of the literature on pulsed laser deposited thin film materials used in devices for energy storage and conversion, i.e., lithium microbatteries, supercapacitors, and electrochromic displays. Three classes of materials are considered: Positive electrode materials (cathodes), solid electrolytes, and negative electrode materials (anodes). The growth conditions and electrochemical properties are presented for each material and state-of-the-art of lithium microbatteries are also reported.

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Section: Licoo 2 (Lco)mentioning

confidence: 99%

Pulsed Laser Deposited Films for Microbatteries

Julien

Mauger

2019

Coatings

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“…[28a,29] Other coating materials include Li 2 WO 4 which has been investigated in various forms from tetragonal to rhombohedral to amorphous [30] and amorphous lithium niobates and tantalates. [31] As intuitively expected surface coatings are shown to alter the interface properties often improving kinetics. [32] Studies have also used C-containing targets or sequentially grown layers of carbon-based material between LiCoO 2 -rich layers.…”

Section: Cathode Materialsmentioning

confidence: 92%

“…This substitution was used to reconcile the electrochemical performance observed relative to an uncoated electrode . Other coating materials include Li 2 WO 4 which has been investigated in various forms from tetragonal to rhombohedral to amorphous and amorphous lithium niobates and tantalates . As intuitively expected surface coatings are shown to alter the interface properties often improving kinetics .…”

Section: Cathode Materialsmentioning

confidence: 99%

Pulsed Laser Deposition‐based Thin Film Microbatteries

Fenech

Sharma

2020

Chemistry An Asian Journal

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Emerging applications for robust small format or distributed devices feature a need for power and rechargeable lithium-ion batteries could play a significant role. This review focuses on a high precision technique to controllably grow thin-film electrodes or full all-solid-state batteries, that is, pulsed laser deposition (PLD). The technique and solidstate batteries are introduced followed by a detailed showcase of the depth of PLD-based growth undertaken on cathodes, electrolytes, anodes and whole microbatteries. Emphasis is placed on the various characterization techniques available to study PLD grown components and devices, and how interfaces become both critical and arguably easier to probe in PLD grown films or devices. This work provides a perspective on the techniques, its opportunities for electrodes and devices, and how to probe the resulting growth and its evolution in batteries.

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“…This type of material, which will be denoted as NbOx in the rest of the manuscript, can function as electrode [11] and electrolyte [12] but its most interesting application is as cathode coating. [13,14] Lithiated NbOx processed by atomic layer deposition (ALD) possesses an ionic conductivity of 10 -9 S cm -1 [12] and is electrochemically stable in combination with layered oxide cathode materials, such as LiCoO2 (LCO) [15,16]. Deposited on a cathode material, NbOx can play a role as protective layer, surface modifier and bulk dopant.…”

Section: Introductionmentioning

confidence: 99%

In situ Lithiated ALD Niobium Oxide for Improved Long Term Cycling of Layered Oxide Cathodes: A Thin-Film Model Study

Aribia¹,

Sastre²,

Chen³

et al. 2021

Preprint

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Protective coatings applied to cathodes help to overcome interface stability issues and extend the cycle life of Li-ion batteries. However, within 3D cathode composites it is difficult to isolate the effect of the coating because of the additives and non-ideal interfaces. In this study we investigate niobium oxide (NbOx) as cathode coating in a thin-film model system, which provides simple access to the cathode-coating-electrolyte interface. The conformal NbOx coating was applied by atomic layer deposition (ALD) onto thin-film LiCoO2 cathodes. The cathode/coating stacks were annealed to lithiate the NbOx and ensure sufficient ionic conductivity. A range of different coating thicknesses were investigated to improve the electrochemical cycling with respect to the uncoated cathode. At a NbOx thickness of 30 nm, the cells retained 80% of the initial capacity after 493 cycles at 10 C, more than doubling the cycle life of the uncoated cathode film. At the same thickness, the coating also showed a positive impact on the rate performance of the cathode: 47% of the initial capacity was accessible even at ultrahigh charge-discharge rates of 100 C. Using impedance spectroscopy measurements, we found that the enhanced performance is due to suppressed interfacial resistance growth during cycling. Elemental analysis using TOF-SIMS and XPS further revealed a bulk and surface contribution of the NbOx coating. These results show that in situ lithiated ALD NbOx can significantly improve the performance of layered oxide cathodes by enhancing interfacial charge transfer and inhibiting surface degradation of the cathode, resulting in better rate performance and cycle life.

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Electrochemical properties of LiCoO 2 thin film surface modified by lithium tantalate and lithium niobate coatings

Cited by 29 publications

References 31 publications

Pulsed Laser Deposited Films for Microbatteries

Pulsed Laser Deposited Films for Microbatteries

Pulsed Laser Deposition‐based Thin Film Microbatteries

In situ Lithiated ALD Niobium Oxide for Improved Long Term Cycling of Layered Oxide Cathodes: A Thin-Film Model Study

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