Characterization of electrode/electrolyte interface for lithium batteries using in situ synchrotron X-ray reflectometry—A new experimental technique for LiCoO2 model electrode

Hirayama, Masaaki; Sonoyama, Noriyuki; Abe, Takeshi; Minoura, Machiko; Ito, Masumi; Mori, Daisuke; Yamada, Atsuo; Kanno, Ryoji; Terashima, Takahito; Takano, Mikio; Tamura, Kazuhisa; Мizuki, J.

doi:10.1016/j.jpowsour.2007.03.034

Cited by 109 publications

(108 citation statements)

References 23 publications

Supporting

Mentioning

101

Contrasting

Order By: Relevance

“…Many phosphoric ions were distributed on the side of the layer. This face is electrically activated [3]. This result corroborates that phosphoric ions formed during charge and discharge cycles.…”

Section: Resultssupporting

confidence: 82%

“…A recent study of the positive electrode, demonstrated that the SEI layer is expected to be present on the positive electrode [2]. Another research reported that the interface reaction of an ideal epitaxial electrode and an electrolyte depends on the orientation of an electrode [3]. The horizontal face of the c-axis of a LiCoO 2 particle is electrically active.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Observation of a LiCoO<sub>2</sub> Cathode Material of a Li-Ion Battery by High Spatial Resolution TOF-SIMS

Ohnishi

Matsuoka

Nogi

et al. 2012

e-J. Surf. Sci. Nanotechnol.

View full text Add to dashboard Cite

Lithium (Li)-ion batteries will be important to future generations for use as clean energy-storage devices. However, the surface chemical reaction mechanism of the electrode has not been revealed to date. In this study, surface observation and chemical species mapping of cathode material for the Li-ion batteries were performed using a laboratory-made time-of-flight secondary ion mass spectrometry (TOF-SIMS) apparatus. The most notable feature of this apparatus is its high-spatial resolution (∼40 nm), which is achieved by employing a focused ion beam. In order to reveal the spatial distributions of chemical species on the LiCoO2 cathode material, we applied the new TOF-SIMS measurement. Differences in the distribution of molecular species on the crystal face were observed with this apparatus.

show abstract

Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Observation of a LiCoO<sub>2</sub> Cathode Material of a Li-Ion Battery by High Spatial Resolution TOF-SIMS

Ohnishi

Matsuoka

Nogi

et al. 2012

e-J. Surf. Sci. Nanotechnol.

View full text Add to dashboard Cite

show abstract

“…Surface structural changes of the epitaxial thin film electrodes during the first electrochemical step were analyzed for other intercalation materials by surface XRD and X-ray reflectivity measurements. 11,13,18 For example, epitaxial LiMn 2 O 4 films show an anisotropic structural changes between the (111) and (110) planes, and the (111) plane is more stable than the (110) plane during the first charge-discharge process.…”

Section: ¹3mentioning

confidence: 99%

Characterization of Nano-Sized Epitaxial Li4Ti5O12(110) Film Electrode for Lithium Batteries

et al. 2012

Self Cite

View full text Add to dashboard Cite

Electrochemical properties and structure changes of nano-sized Li 4 Ti 5 O 12 during lithium (de)intercalation were investigated using a two-dimensional thin film electrode. Li 4 Ti 5 O 12 thin films were deposited on a Nb:SrTiO 3 (110) substrate by a pulsed laser deposition technique. X-ray diffraction and reflectometry measurements confirmed the epitaxial growth of 27.6-nm-thick Li 4 Ti 5 O 12 (110) films. Galvanostatic charge-discharge curves showed a large discharge capacity of 217 mAh g −1 at the initial discharge cycle, although the reversible capacity decreased in subsequent cycles. In situ X-ray diffraction measurements clarified the drastic structural changes of the Li 4 Ti 5 O 12 film upon soaking in the electrolyte and during the first intercalation and deintercalation processes. The surface region of Li 4 Ti 5 O 12 had a different structure from the bulk during electrochemical cycling and could cause the nanosized Li 4 Ti 5 O 12 electrodes to have high capacities and poor stabilities.

show abstract

“…13,14 Although these methods are potent to probe the interface, they however cannot probe amorphous structures or even electronic structural changes. Recently we have developed operando total-reflection fluorescence X-ray absorption spectroscopy (TRF-XAS) 15,16 and operando depthresolved X-ray absorption spectroscopy (DR-XAS).…”

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

View full text Add to dashboard Cite

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.

show abstract

Characterization of electrode/electrolyte interface for lithium batteries using in situ synchrotron X-ray reflectometry—A new experimental technique for LiCoO2 model electrode

Cited by 109 publications

References 23 publications

Observation of a LiCoO<sub>2</sub> Cathode Material of a Li-Ion Battery by High Spatial Resolution TOF-SIMS

Observation of a LiCoO<sub>2</sub> Cathode Material of a Li-Ion Battery by High Spatial Resolution TOF-SIMS

Characterization of Nano-Sized Epitaxial Li4Ti5O12(110) Film Electrode for Lithium Batteries

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

Contact Info

Product

Resources

About