Journal ArticleDOI
Soft X-Ray Absorption Spectroscopic Study of a LiNi0.5Mn0.5 O 2 Cathode during Charge
Won-Sub Yoon,Mahalingam Balasubramanian,Xiao-Qing Yang,Zugen Fu,Daniel A. Fischer,James McBreen +5 more
Reads0
Chats0
TLDR
In this paper, soft X-ray (200 to 1000 eV) absorption spectroscopy at the O K-edge and the metal L II,III -edges, in both the fluorescence yield (FY) and the partial electron yield (PEY) mode, has been used to probe the electronic structure of electrochemically deintercalated Li 1-x Ni 05 Mn 05 O 2 Abstract:
Soft X-ray (200 to 1000 eV) absorption spectroscopy at the O K-edge and the metal L II,III -edges, in both the fluorescence yield (FY) and the partial electron yield (PEY) mode, has been used to probe the electronic structure of electrochemically deintercalated Li 1-x Ni 05 Mn 05 O 2 FY and PEY spectra of the transition metal L II,III -edges, indicated that Mn ions remain mostly unchanged in the Mn 4+ state at all levels of charge However, the Ni FY L-edge spectra show a continuous shift to higher energy during charge, but remain mostly unchanged in the PEY data The results of the FY data show that the Ni ions in the bulk are oxidized form Ni 2+ to Ni 4+ during charge The difference between the surface-sensitive PEY data and the bulk-sensitive FY data indicates that the surface of Li 1-x Ni 05 Mn 05 O 2 has a different electronic structure than the bulk The shift in the O K-edge to lower energies and the development of a shoulder on the low energy side of the first pre-edge peak indicates that the holes compensating the lithium ion deintercalation are located in O 2p states as well as Ni 3d states These results show that soft X-ray absorption is a powerful technique for studying the electronic structure of new battery materials and it provides unique complementary information to that obtained from hard X-ray (above 1000 eV) absorption studies at the transition metal K-edgesread more
Citations
More filters
Journal ArticleDOI
Li2MnO3-stabilized LiMO2 (M = Mn, Ni, Co) electrodes for lithium-ion batteries
Michael M. Thackeray,Sun-Ho Kang,Christopher S. Johnson,John T. Vaughey,Roy Benedek,Stephen A. Hackney +5 more
TL;DR: In this paper, a strategy used to design high capacity (>200 mAh g−1), Li2MnO3-stabilized LiMO2 (M = Mn, Ni, Co) electrodes for lithium-ion batteries is discussed.
Journal ArticleDOI
Advances in manganese-oxide ‘composite’ electrodes for lithium-ion batteries
TL;DR: In this paper, a two-component notation is used to represent the Li2MnO3, LiMO2 and LiM2O4 components, which provide an initial capacity >250 mAh g−1 when discharged between 5 and 2.0 V vs. Li0 and a rechargeable capacity up to 250 mAhg−1 over the same potential window.
Journal ArticleDOI
Nickel-Rich and Lithium-Rich Layered Oxide Cathodes: Progress and Perspectives
TL;DR: Li-rich layered oxides have attracted much research interest as cathodes for Li-ion batteries due to their low cost and higher discharge capacities compared to those of LiCoO2 and LiMn2O4 as mentioned in this paper.
Journal ArticleDOI
Review on electrode–electrolyte solution interactions, related to cathode materials for Li-ion batteries
Doron Aurbach,Boris Markovsky,Gregory Salitra,Elena Markevich,Yossi Talyossef,Maxim Koltypin,Linda F. Nazar,Brian L. Ellis,Daniella Kovacheva +8 more
TL;DR: In this paper, the surface chemistry of the following cathode materials: LiCoO 2, V 2 O 5, LiMn 2 O 4, Li Mn 0.5 O 4 and Li MmN 0.
References
More filters
Journal ArticleDOI
Layered Cathode Materials Li [ Ni x Li ( 1 / 3 − 2x / 3 ) Mn ( 2 / 3 − x / 3 ) ] O 2 for Lithium-Ion Batteries
TL;DR: The structure, synthesis, and electrochemical behavior of layered for 5/12, and 1/2 are reported for the first time in this article, where the authors derive from or by substitution of and by while maintaining all the remaining Mn atoms in the 4+ oxidation state.
Journal ArticleDOI
Layered Lithium Insertion Material of LiNi1/2Mn1/2O2 : A Possible Alternative to LiCoO2 for Advanced Lithium-Ion Batteries
TL;DR: In this paper, a layered nickel manganese oxide of LiNi1/2Mn 1/2O2 (a = 2.89 A and c = 14.30 A in hexagonal setting) was successfully prepared and shown that this material may be a possible alternative to LiCoO2 for advanced lithium batteries.
Journal ArticleDOI
X-ray absorption and dichroism of transition metals and their compounds
TL;DR: In this article, an overview of the X-ray absorption spectra of 3D transition metals and their compounds is presented, focusing on the description of the absorption process and the various routes to interpret the results within the framework of their electronic structure.
Journal ArticleDOI
Controlled-valence properties of La1-xSrxFeO3 and La1-xSrxMnO3 studied by soft-x-ray absorption spectroscopy.
M. Abbate,F. M. F. de Groot,J. C. Fuggle,Atsushi Fujimori,O. Strebel,F. Lopez,M. Domke,G. Kaindl,George A. Sawatzky,Mikio Takano,Yasuo Takeda,Hiroshi Eisaki,S. Uchida +12 more
TL;DR: In this paper, a comparison between the transition-metal 2p spectra and atomic-multiplet calculations is used to determine the 3d count of holes induced by substitution for both series are located in states of mixed metal 3d--oxygen 2p character.
Journal ArticleDOI
Full correction of the self-absorption in soft-fluorescence extended x-ray-absorption fine structure.
TL;DR: This work studied the distortions in the FLEXAFS spectra through the self-absorption effect measuring the FleXafS of a NiO single crystal above the oxygen K edge for various detection geometries.
Related Papers (5)
Understanding the Anomalous Capacity of Li / Li [ Ni x Li ( 1 / 3 − 2x / 3 ) Mn ( 2 / 3 − x / 3 ) ] O 2 Cells Using In Situ X-Ray Diffraction and Electrochemical Studies
Zhonghua Lu,J. R. Dahn +1 more
Layered Lithium Insertion Material of LiCo1/3Ni1/3Mn1/3O2 for Lithium-Ion Batteries
Reversible anionic redox chemistry in high-capacity layered-oxide electrodes
Mariyappan Sathiya,Gwenaëlle Rousse,Kannadka Ramesha,C.P. Laisa,Hervé Vezin,Moulay Tahar Sougrati,Moulay Tahar Sougrati,Marie-Liesse Doublet,Dominique Foix,Danielle Gonbeau,Danielle Gonbeau,Wesley Walker,Annigere S. Prakash,M. Ben Hassine,M. Ben Hassine,Loic Dupont,Loic Dupont,Jean-Marie Tarascon,Jean-Marie Tarascon +18 more