Composition and Growth Behavior of the Surface and Electrolyte Decomposition Layer of/on a Commercial Lithium Ion Battery LixNi1/3Mn1/3Co1/3O2 Cathode Determined by Sputter Depth Profile X-ray Photoelectron Spectroscopy

Niehoff, Philip; Winter, Martin

doi:10.1021/la403276p

Cited by 87 publications

(68 citation statements)

References 45 publications

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“…This mechanism can start already at OCP but becomes more favorable at a higher degree of delithiation. The EC dissociation is then followed by a series of reactions that leads to the formation of oligo‐ether carbonates and polymers, predicted in theoretical reports,, and observed experimentally ,. A possible pathway for the EC dissociation follows the reaction proposed by Giordano et al …”

Section: Discussionmentioning

confidence: 80%

Surface Degradation and Chemical Electrolyte Oxidation Induced by the Oxygen Released from Layered Oxide Cathodes in Li−Ion Batteries

Leanza

Mirolo

Vaz

et al. 2019

Batteries & Supercaps

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High‐resolution, surface sensitive soft X‐ray photoemission electron microscopy (XPEEM) reveals the fine interplay between oxygen and transition metal (TM) redox activities on the surface of a Li1.17(Ni0.22Co0.12Mn0.66)0.83O2 (Li‐rich NCM) electrode. We demonstrate that the oxidation of oxygen in the lattice is accompanied by TM reduction already at 4.47 V vs. Li+/Li, as a result of oxygen loss from the surface, the latter process being enhanced at 4.8 V where oxygen gas reaches a maximum release rate. Simultaneously, we find evidence for the chemical oxidation of the electrolyte solvents above 4.8 V induced by the released oxygen, leading to the formation of a carbonate by‐products layer that covers homogeneously the particles of the counter electrode Li4Ti5O12 (LTO). The latter observation demonstrates that migration‐diffusion of such oxidized solvent by‐products occurs only when the solvents are chemically oxidized. We showed also that the Li‐rich NCM is susceptible to oxygen loss during soaking in the electrolyte, which causes TMs reduction and the poisoning of the counter electrode.

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Section: Discussionmentioning

confidence: 80%

Surface Degradation and Chemical Electrolyte Oxidation Induced by the Oxygen Released from Layered Oxide Cathodes in Li−Ion Batteries

Leanza

Mirolo

Vaz

et al. 2019

Batteries & Supercaps

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“…In here we analyze the degradation products of the layered lithium metal oxide Li 1 Ni 1/3 Co 1/3 Mn 1/3 O 2 (NCM) [20,21].…”

Section: Introductionmentioning

confidence: 99%

Development of a method for direct elemental analysis of lithium ion battery degradation products by means of total reflection X-ray fluorescence

Evertz

Lürenbaum

Vortmann

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…However,a fter these formation cycles the cell shows astable, highly reversible performance with coulombic efficiencies higher than 99 %. [19][20][21][22][23] The ex situ SEM characterization of the pristine NMC-based electrode is depicted in Figure 2d.T he NMC particles reveal ac lear surface. The potentialp rofiles of TMO-C, presented in Figure 1e,r eveal ac ontinuous shift of the profiles towards higher potentials.…”

Section: Resultsmentioning

confidence: 99%

A Lithium‐Ion Battery with Enhanced Safety Prepared using an Environmentally Friendly Process

et al. 2016

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A new lithium-ion battery chemistry is presented based on a conversion-alloying anode material, a carbon-coated Fe-doped ZnO (TMO-C), and a LiNi1/3 Mn1/3 Co1/3 O2 (NMC) cathode. Both electrodes were fabricated using an environmentally friendly cellulose-based binding agent. The performance of the new lithium-ion battery was evaluated with a conventional, carbonate-based electrolyte (ethylene carbonate:diethyl carbonate-1 m lithium hexafluorophosphate, EC:DEC 1 m LiPF6 ) and an ionic liquid (IL)-based electrolyte (N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide-0.2 m lithium bis(trifluoromethanesulfonyl)imide, Pyr14 TFSI 0.2 m LiTFSI), respectively. Galvanostatic charge/discharge tests revealed a reduced rate capability of the TMO-C/Pyr14 TFSI 0.2 m LiTFSI/NMC full-cell compared to the organic electrolyte, but the coulombic efficiency was significantly enhanced. Moreover, the IL-based electrolyte substantially improves the safety of the system due to a higher thermal stability of the formed anodic solid electrolyte interphase and the IL electrolyte itself. While the carbonate-based electrolyte shows sudden degradation reactions, the IL exhibits a slowly increasing heat flow, which does not constitute a serious safety risk.

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Composition and Growth Behavior of the Surface and Electrolyte Decomposition Layer of/on a Commercial Lithium Ion Battery Li_xNi_1/3Mn_1/3Co_1/3O₂ Cathode Determined by Sputter Depth Profile X-ray Photoelectron Spectroscopy

Cited by 87 publications

References 45 publications

Surface Degradation and Chemical Electrolyte Oxidation Induced by the Oxygen Released from Layered Oxide Cathodes in Li−Ion Batteries

Surface Degradation and Chemical Electrolyte Oxidation Induced by the Oxygen Released from Layered Oxide Cathodes in Li−Ion Batteries

Development of a method for direct elemental analysis of lithium ion battery degradation products by means of total reflection X-ray fluorescence

A Lithium‐Ion Battery with Enhanced Safety Prepared using an Environmentally Friendly Process

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