Impedance spectroscopic study of the charge transfer resistance at the interface between a LiNi0.5Mn1.5O4 high-voltage cathode film and a LiNbO3 coating film

Gellert, Michael; Gries, Katharina; Sann, Joachim; Pfeifer, Erik; Volz, Kerstin; Roling, Bernhard

doi:10.1016/j.ssi.2016.01.031

Cited by 36 publications

(13 citation statements)

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“…Modification of LNMO particles with a Li + ‐ion conductive coating has been widely investigated toward improving the interfacial property of LNMO cathodes. The ionic coating materials are mostly Li + ‐ion conductive ceramics, such as Li 4 SiO 4 , [ 134 ] Li 3 PO 4 , [ 135 ] Li 4 P 2 O 7 , [ 136 ] Li 2 SiO 3 , [ 137 ] LaFeO 3 , [ 138 ] Li 0.33 La 0.56 TiO 3 , [ 139 ] Li 2 O‐2B 2 O 3 , [ 140 ] Li 2 O‐Al 2 O 3 ‐TiO 2 ‐P 2 O 5 , [ 141 ] LiNbO 3 , [ 142 ] FePO 4 , [ 143 ] AlPO 4 , [ 144 ] and lithium polyacrylate, [ 145 ] etc.…”

Section: Approaches To Improve the Cycling Stability Of Lnmomentioning

confidence: 99%

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Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Manthiram

2021

Small Methods

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Insertion compounds have been dominating the cathodes in commercial lithium‐ion batteries. In contrast to layered oxides and polyanion compounds, the development of spinel‐structured cathodes is a little behind. Owing to a series of advantageous properties, such as high operating voltage (≈4.7 V), high capacity (≈135 mAh g−1), low environmental impact, and low fabrication cost, the high‐voltage spinel LiNi0.5Mn1.5O4 represents a high‐power cathode for advancing high‐energy‐density Li+‐ion batteries. However, the wide application and commercialization of this cathode are hampered by its poor cycling performance. Recent progress in both the fundamental understanding of the degradation mechanism and the exploration of strategies to enhance the cycling stability of high‐voltage spinel cathodes have drawn continuous attention toward this promising insertion cathode. In this review article, the structure–property correlations and the failure mode of high‐voltage spinel cathodes are first discussed. Then, the recent advances in mitigating the cycling stability issue of high‐voltage spinel cathodes are summarized, including the various approaches of structural design, doping, surface coating, and electrolyte modification. Finally, future perspectives and research directions are put forward, aiming at providing insightful information for the development of practical high‐voltage spinel cathodes.

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Section: Approaches To Improve the Cycling Stability Of Lnmomentioning

confidence: 99%

Section: Approaches To Improve the Cycling Stability Of Lnmomentioning

confidence: 99%

Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Manthiram

2021

Small Methods

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“…If high-voltage cathode materials are used to increase the power and energy density of the system, the electrolyte has to withstand potentials as a high as 5 V. Although electrochemical stability of solid electrolytes has been shown to be much better than that of liquid organic blends [84], the long-term stability of a given solid at high cathode potentials or being in contact with Li metal is still one of the white areas future research has to tackle. Placing a very thin, artificial interlayer such as crystalline (or amorphous) LiAlO 2 , LiTaO 3 , LiNbO 3 or even Al 2 O 3 [85] at the cathode-electrolyte interface may increase chemical and electrochemical stability [21,79,86,87]. These electronically insulating extra phases may, however, suffer from low intrinsic conductivity.…”

Section: The Demands On Solid Electrolytes and All-solid-state Batteriesmentioning

confidence: 99%

Ion dynamics in solid electrolytes for lithium batteries

et al. 2017

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All-solid-state batteries with ceramic electrolytes and lithium metal anodes represent an attractive alternative to conventional ion battery systems. Conventional batteries still rely on flammable liquids as electronic insulators. Despite the great efforts reported over the last years, the optimum solid electrolyte has, however, not been found yet. One of the most important properties which decides whether a ceramic is useful to work as electrolyte is ionic transport. The various time-domain nuclear magnetic resonance (NMR) techniques might help characterize and select the most suitable candidates. Together with conductivity measurements it is possible to analyze ion dynamics on different length-scales, i.e., to differentiate between local, within-site hopping processes from long-range ion transport. The latter needs to be sufficiently fast in the ceramic, in the best case competing with that of liquid electrolytes. In addition to conductivity spectroscopy, NMR can help understand the relationship between local structure and dynamic parameters. Besides information on activation energies and jump rates the data also contain suggestions about the relevant elementary steps of ion hopping and, thus, Support by the Deutsche Forschungsgemeinschaft (DFG) is highly appreciated (FOR 1277 diffusion pathways through the crystal lattice. Recent progress in characterizing ion dynamics in ceramic electrolytes by NMR relaxometry will be briefly reviewed. Focus is put on presently discussed solid electrolytes such as garnets, phosphates and sulfides, which have so far been studied in our lab.

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“…Of course, their success will depend on low interfacial resistances, including grain boundaries, and negligible degradation processes at the electrode‐electrolyte interface . The latter might be inhibited by using additional protective layers consisting of moderate but inert Li ion conductors with a thickness of just a few nm …”

Section: Introductionmentioning

confidence: 99%

Solid Electrolytes: Extremely Fast Charge Carriers in Garnet‐Type Li₆La₃ZrTaO₁₂ Single Crystals

et al. 2017

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The development of all-solid-state electrochemical energy storage systems, such as lithiumion batteries with solid electrolytes, requires stable, electronically insulating compounds with exceptionally high ionic conductivities. Considering oxides, garnet-type Li7La3Zr2O12 and derivatives, see Zr-exchanged Li6La3ZrTaO12 (LLZTO), have attracted great attention because of its high Li + ionic conductivity of up to 1 mS · cm −1 . Despite numerous studies focusing on conductivities of powder samples, only a few use time-domain NMR methods to probe Li ion diffusion parameters in single crystals. Here we report, for the first time, on temperature-variable 7 Li NMR relaxometry measurements using both laboratory and spin-lock techniques to probe Li jump rates in monocrystalline Li-bearing garnets. Timedomain NMR offers the possibility to study Li ion dynamics on both the short-range and long-range length scale. The techniques applied yield a fully consistent picture of correlated Li ion jump diffusion in LLZTO; the data perfectly mirror a modified BPP-type relaxation response being based on a Lorentzian-shaped relaxation function. The rates measured could be parameterized with a single set of diffusion parameters. Dynamic information about the elementary jump processes, such as jump rates and activation energies, were extracted from complete diffusion-induced rate peaks that are obtained when the relaxation rate is plotted vs inverse temperature. Results from NMR are completely in line with ion transport parameters derived from conductivity spectroscopy. Acknowledgement. We thank our colleagues at the University of Hannover and the TU Graz for valuable discussions. Financial support by the Deutsche Forschungsgemeinschaft

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Impedance spectroscopic study of the charge transfer resistance at the interface between a LiNi0.5Mn1.5O4 high-voltage cathode film and a LiNbO3 coating film

Cited by 36 publications

References 33 publications

Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Ion dynamics in solid electrolytes for lithium batteries

Solid Electrolytes: Extremely Fast Charge Carriers in Garnet‐Type Li₆La₃ZrTaO₁₂ Single Crystals

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Impedance spectroscopic study of the charge transfer resistance at the interface between a LiNi0.5Mn1.5O4 high-voltage cathode film and a LiNbO3 coating film

Cited by 36 publications

References 33 publications

Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Advances and Prospects of High‐Voltage Spinel Cathodes for Lithium‐Based Batteries

Ion dynamics in solid electrolytes for lithium batteries

Solid Electrolytes: Extremely Fast Charge Carriers in Garnet‐Type Li6La3ZrTaO12 Single Crystals

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Product

Resources

About

Solid Electrolytes: Extremely Fast Charge Carriers in Garnet‐Type Li₆La₃ZrTaO₁₂ Single Crystals