Mobility of lithium ions in anodic alumina formed on an Al–Li alloy

Tzoganakou, K.; Skeldon, P.; Thompson, G.E.; Zhou, Xiaorong; Kreißig, U.; Wieser, E.; Habazaki, H.; Shimizu, K.

doi:10.1016/s0010-938x(99)00130-4

Cited by 12 publications

(3 citation statements)

References 17 publications

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“…On the vertical axes, the counts / energy in the RBS and ERD spectra correspond to the concentrations of constituent elements such as 1 H, 3 Li, 8 O, 14 Si, 15 P 22 Ti, and 27 Co in Au/LiCoO 2 /LATP. The thickness of each Au and LiCoO 2 thin film was determined from approximately 628-711 and 195-255 channels of Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In the case of solid-state Li-batteries, it has been deduced that large amounts of H atoms are absorbed into the cathode materials which disturb Li + ion behavior. To clarify the relationship between trapped H atoms and Li + ion conduction in the LiCoO 2 thin films, it is essential to investigate the behaviors of both H and Li atoms at the same time, although there have been few direct Li-concentration analyses of materials [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Measurements of Hydrogen and Lithium Distributions in Lithium-Cobalt-Oxide Films with Charging and Heating Using Elastic Recoil Detection Techniques

et al. 2015

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The migrations of lithium (Li) as well as hydrogen (H) in multi-layers thin films of Au/LiCoO 2 (thickness: approximately nm/ 0 nm), deposited onto one face of Li 1.4 Ti 2 Si 0.4 P 2.6 O 12 -AlPO 4 (LATP) substrates, were dynamically observed with electric charging as well as isochronal annealing in vacuum by combining elastic recoil detection (ERD) analysis with Rutherford backscattering spectrometry (RBS) with 9.0-MeV O 4+ ion-probe beams. The ERD spectra clearly revealed that Li atoms of approximately 9.4 at% migrated from the LiCoO 2 surface to the LiCoO 2 /LATP interface with H absorption by a charge of approximately 0.48 e/cm 2 , which the acquired voltage was 1.65 V. In addition, the diffusion of Li atoms to the LATP bulk occurred with H release by isochronal annealing at only 323 K for 10 min. The presence of H significantly influences the Li + ion conduction for the Li-battery systems.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Measurements of Hydrogen and Lithium Distributions in Lithium-Cobalt-Oxide Films with Charging and Heating Using Elastic Recoil Detection Techniques

et al. 2015

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“…This indicates that the local film composition is determined by the composition of the fine precipitates that form the film, and the local film composition doesn't change significantly during the course of anodizing. Previous work [33][34][35] indicates that lithium and magnesium cations are highly soluble in acidic anodizing electrolytes, suggesting that lithium in T 1 phase caused the selective dissolution of the anodic film formed from fine T 1 phase precipitates.…”

Section: Discussionmentioning

confidence: 98%

Effect of Anodizing Parameters on Film Morphology and Corrosion Resistance of AA2099 Aluminum-Lithium Alloy

Zhou

Liao

et al. 2016

J. Electrochem. Soc.

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The effect of anodization temperature and tartaric acid concentration on the morphology and corrosion resistance of the anodic film formed on AA2099-T8 alloy in tartaric-sulfuric acid was investigated. It was found that the dissolution of the anodic film during anodizing led to increased pore size, rod-shaped cavities and grain boundary grooves in the anodic films. The rod-shaped cavities and grain boundary grooves are associated with selective dissolution of the anodic film formed from fine T 1 (Al 2 CuLi) phase precipitates due to the difference in the reactivity of the films formed from different phases. The increased porosity due to dissolution degraded the corrosion resistance of the anodic film. In the temperature range of 22-47 • C, with 0.53 M tartaric acid addition, anodizing at 42 • C provided the best corrosion performance and a relatively high anodizing efficiency; in the tartaric acid concentration range of 0-0.9 M, at 37 • C, anodizing in electrolytes containing 0.7 and 0.9 M tartaric acid provided good corrosion resistance with little decrease of anodizing efficiency. The corrosive medium did not penetrate the anodic film uniformly but preferentially at local sites, resulting in localized corrosion of the anodized alloy. Aluminum and its alloys are protected from corrosion by an airformed oxide film of several nanometers thickness. However, the protective ability of the air-formed oxide film is limited due to its small thickness. In order to obtain more reliable and durable protection for aluminum and its alloys, a relatively thick oxide film has been pursued. As a case in point, aerospace aluminum alloys are anodized in acidic electrolyte to produce a relatively thick anodic oxide film of a few micrometers, providing the alloys with reasonable corrosion resistance and/or suitable surface for painting and adhesive bonding. Chromic acid anodizing (CAA) used to be the most widely employed anodizing process in aerospace industry.1-3 However, the high toxicity associated with Cr (VI) has restricted the application of CAA. Since 1990s, there have been many efforts to find alternative anodizing process to replace CAA in aerospace industry. [4][5][6] Sulfuric acid anodizing (SAA) is a commonly used, environmentally friendly anodizing process. However, a relatively thicker anodic film is needed for SAA than for CAA if the same corrosion resistance is required. 3On the other hand, increased film thickness will sacrifice fatigue resistance of the anodized components, 3,7-9 not mentioning cost increase. In 1990, Wong et al.3 invented a boric-sulfuric acid anodizing (BSA) process, which modifies the traditional SAA process by reducing the concentration of sulfuric acid and adding boric acid. It is now recognized that the performance of the anodic film produced by BSA is similar to that of the anodic film produced by CAA. 5,10 At the begin of the twenty first century, a new anodizing process, called tartaricsulfuric acid anodizing (TSA), was patented by Alenia Aeronautica S.P.A.11 to compete with BSA. Since th...

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