First experimental results from IBM/TENN/TULANE/LLNL/LBL undulator beamline at the advanced light source

Jia, Jianjun; Callcott, T. A.; Yurkas, J.; Ellis, A W; Himpsel, F. J.; Samant, Mahesh G.; Stöhr, J.; Ederer, D. L.; Carlisle, John A.; Hudson, Eric A.; Terminello, Louis J.; Shuh, David K.; Perera, R. C. C.

doi:10.1063/1.1145985

Cited by 375 publications

(200 citation statements)

References 5 publications

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“…The sample transfer chamber was sealed and mounted directly onto the ultra-high vacuum XAS characterization chamber to avoid any air exposure effects 52 . sXAS was performed at Beamline 8.0.1 of the Advanced Light Source (ALS) in LBNL 53 . The undulator and spherical grating monochromatic supply a linearly polarized photon beam with resolving power up to 6,000.…”

Section: Methodsmentioning

confidence: 99%

Ti-substituted tunnel-type Na0.44MnO2 oxide as a negative electrode for aqueous sodium-ion batteries

et al. 2015

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The aqueous sodium-ion battery system is a safe and low-cost solution for large-scale energy storage, because of the abundance of sodium and inexpensive aqueous electrolytes. Although several positive electrode materials, for example, Na 0.44 MnO 2 , were proposed, few negative electrode materials, for example, activated carbon and NaTi 2 (PO 4 ) 3 , are available. Here we show that Ti-substituted Na 0.44 MnO 2 (Na 0.44 [Mn 1-x Ti x ]O 2 ) with tunnel structure can be used as a negative electrode material for aqueous sodium-ion batteries. This material exhibits superior cyclability even without the special treatment of oxygen removal from the aqueous solution. Atomic-scale characterizations based on spherical aberration-corrected electron microscopy and ab initio calculations are utilized to accurately identify the Ti substitution sites and sodium storage mechanism. Ti substitution tunes the charge ordering property and reaction pathway, significantly smoothing the discharge/charge profiles and lowering the storage voltage. Both the fundamental understanding and practical demonstrations suggest that Na 0.44 [Mn 1-x Ti x ]O 2 is a promising negative electrode material for aqueous sodium-ion batteries.

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Section: Methodsmentioning

confidence: 99%

Ti-substituted tunnel-type Na0.44MnO2 oxide as a negative electrode for aqueous sodium-ion batteries

et al. 2015

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“…20 The beamline uses a Rowland circle type diffraction grating spectrometer with a 90 scattering angle, and the incident radiation is plane-polarized within the horizontal scattering plane. Soft XAS were measured using the spherical grating monochromator (SGM) beamline of the Canadian Light Source (CLS) at the University of Saskatchewan.…”

Section: Methodsmentioning

confidence: 99%

The formation of Ti–O tetrahedra and band gap reduction in SiO2 via pulsed ion implantation

Green

Zatsepin

Hunt

et al. 2013

Journal of Applied Physics

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Titanium ions are implanted into amorphous SiO 2 at two different fluences using pulsed ion implantation, and the resulting samples are annealed. Bulk sensitive soft X-ray absorption spectroscopy of the Ti L 2;3 edge reveal strikingly different spectra for the two fluences. Spectral simulations using multiplet crystal field theory show clearly that for low fluence the Ti ions have a local octahedral coordination, while at higher fluence the formation of Ti 4þ -O tetrahedra dominates. Using O K-edge X-ray absorption and emission, the effect of the Ti states on the valence and conduction bands of the host SiO 2 is revealed. With the introduction of Ti tetrahedra, the band gap reduces from about 8 eV to just over 4 eV, due entirely to the Ti 3d conduction band states. These results demonstrate the possibility to obtain Ti-O tetrahedra in silica by Ti ion implantation and a suitable thermal treatment, clarify the mechanism of band gap reduction with Ti doping in SiO 2 , and demonstrate the sensitivity of L-edge X-ray absorption with a multiplet crystal field theory analysis to the Ti coordination of novel materials. V C 2013 American Institute of Physics. [http://dx

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“…Its spherical grating monochromator delivers 10 12 photons/second with linear polarization with a resolving power up to 6000 21 . The experimental resolution of the data presented in this work is 0.15 eV without considering the intrinsic corehole broadening.…”

mentioning

confidence: 99%

Effect of excess lithium in LiMn2O4 and Li1.15Mn1.85O4 electrodes revealed by quantitative analysis of soft X-ray absorption spectroscopy

Zhuo

Olalde-Velasco

Chin

et al. 2017

Applied Physics Letters

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First experimental results from IBM/TENN/TULANE/LLNL/LBL undulator beamline at the advanced light source

Cited by 375 publications

References 5 publications

Ti-substituted tunnel-type Na0.44MnO2 oxide as a negative electrode for aqueous sodium-ion batteries

Ti-substituted tunnel-type Na0.44MnO2 oxide as a negative electrode for aqueous sodium-ion batteries

The formation of Ti–O tetrahedra and band gap reduction in SiO2 via pulsed ion implantation

Effect of excess lithium in LiMn2O4 and Li1.15Mn1.85O4 electrodes revealed by quantitative analysis of soft X-ray absorption spectroscopy

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