Synthesis of nano-crystalline LiNbO3-decorated LiCoO2 and resulting high-rate capabilities

Teranishi, Takashi; Inohara, M.; Kano, Jun; Hayashi, Hidetaka; Kishimoto, Akira; Yoda, Koji; Motobayashi, Hidefumi; Tasaki, Yuzo

doi:10.1016/j.ssi.2017.11.020

Cited by 19 publications

(12 citation statements)

References 33 publications

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“…The experimental arrangement chosen combines two materials of technological importance for semiconductors, advanced photonics, nonlinear optics, and other industries, i.e., lithium niobate ,− and silicon. ,,− For example, in the field of LIB development, lithium niobate based materials were found to enable fast LIB operation − and silicon to increase the energy storage capacity. ,− The interface between these two materials is also of interest because LiNbO 3 adjacent to silicon thin layers might be of interest for the fabrication of self-charging LIBs that hybridize mechanical energy harvesting and ion storage processes into one process. , Thin LiNbO 3 layers inserted between the positive electrode and the electrolyte were found to be beneficial for Li transport through LIB interfaces. − ,,− The reduction of the interface impedance is a challenge for proper all-solid-state LIB operation. − …”

Section: Introductionmentioning

confidence: 99%

Lithium Permeability Increase in Nanosized Amorphous Silicon Layers

Hüger

Schmidt

2018

J. Phys. Chem. C

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Li permeation through nanosized amorphous Si layers is investigated for temperatures up to 500 °C (773 K) as a function of layer thickness between 12 and 95 nm. For the experiments the Si layers are embedded between 6Li and 7Li isotope enriched oxide based Li reservoirs, and the thermally induced isotope exchange (through silicon layers and interfaces) is analyzed by secondary ion mass spectrometry in order to calculate Li permeabilities. The experiments reveal that the interface between silicon and the Li metal oxide does not hinder Li permeation and Li diffusion in silicon controls the overall process. The determined Li permeability increases drastically by orders of magnitude with decreasing silicon layer thickness, accompanied by a decrease in the activation enthalpy of Li permeation. These results can be explained by a gradual transition of trap-limited slow Li diffusion at high silicon thicknesses to interstitial fast Li diffusion at low Si thicknesses.

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Section: Introductionmentioning

confidence: 99%

Lithium Permeability Increase in Nanosized Amorphous Silicon Layers

Hüger

Schmidt

2018

J. Phys. Chem. C

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“…Examples of ILs that have been identified as suitable electrolytes include: ammonium [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 ], pyridinium [ 47 , 48 , 49 , 50 ], piperidinium [ 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 ,…”

Section: Ionic Liquids (Il) For Energy Storage Applicationsmentioning

confidence: 99%

Pyrrolidinium Containing Ionic Liquid Electrolytes for Li-Based Batteries

McGrath

Rohan

2020

Molecules

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Ionic liquids are potential alternative electrolytes to the more conventional solid-state options under investigation for future energy storage solutions. This review addresses the utilization of IL electrolytes in energy storage devices, particularly pyrrolidinium-based ILs. These ILs offer favorable properties, such as high ionic conductivity and the potential for high power drain, low volatility and wide electrochemical stability windows (ESW). The cation/anion combination utilized significantly influences their physical and electrochemical properties, therefore a thorough discussion of different combinations is outlined. Compatibility with a wide array of cathode and anode materials such as LFP, V2O5, Ge and Sn is exhibited, whereby thin-films and nanostructured materials are investigated for micro energy applications. Polymer gel electrolytes suitable for layer-by-layer fabrication are discussed for the various pyrrolidinium cations, and their compatibility with electrode materials assessed. Recent advancements regarding the modification of typical cations such a 1-butyl-1-methylpyrrolidinium, to produce ether-functionalized or symmetrical cations is discussed.

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“…Large-scale production of cathode materials is regularly conducted using aqueous precipitation or solid-state methods due to their practical ease and cost efficacy. , Cathode coatings are often prepared by solution-phase or dry coating techniques (e.g., ball milling or chemical vapor deposition). Solution-phase methods, such as a sol–gel method followed by calcination at high temperatures, have been used to prepare nanometer-thick coatings of lithium niobate (LiNbO 3 ) on LNMO particles. − Electrochemically active coatings of LiNbO 3 , and other materials, have demonstrated a beneficial aliovalent substitution of cations (e.g., Nb 5+ ions) into the LNMO lattice. The substitution of the Nb 5+ ions into the lattice can lead to a higher concentration of Mn 3+ ions, which results in a lower charge transfer resistance due to the formation of more active Li-ion hopping pathways .…”

Section: Introductionmentioning

confidence: 99%

Enabling a High-Throughput Characterization of Microscale Interfaces within Coated Cathode Particles

Taylor

Nesvaderani²,

Ovens

et al. 2021

ACS Appl. Energy Mater.

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Lithium-ion batteries represent an emerging field. The development of battery materials could benefit from quick techniques that enable atomic-level diagnostics. High-performance cathodes, such as high-voltage spinel, often require coatings to protect against the destructive electrochemical environments at the particle–electrolyte interface. The preparations of these coatings are still in the early phases of development, and their analytical inspection by high-resolution scanning and transmission electron microscopy (HR-S/TEM) techniques presents a significant challenge due to the microscale dimensions of the cathode particles. In this work, a high-throughput ultramicrotome technique was assessed for the characterization of the particle–coating interface. The ultramicrotome technique enabled the rapid preparation of cross sections with a thickness of 126 ± 66 nm as determined by electron energy loss spectroscopy (EELS) measurements. Cathode particles composed of high-voltage spinel, LiNi0.5Mn1.5O4 (LNMO), coated with lithium niobate (LiNbO3) were synthesized, and cross sections were inspected using HR-S/TEM techniques. These ultrathin cross sections enabled the ability to obtain nanoscale information regarding the composition and crystallinity of the particle–coating interface over lateral areas of >1 μm. Accessible correlations between the electrochemical performance of the LiNbO3-coated LNMO particles and the HR-S/TEM results were enabled by the high-throughput method. Discharge capacity measurements were acquired over a series of 100 electrochemical cycles for both the LiNbO3 coated and the as-prepared LNMO particles. The limitations of the ultramicrotome technique are also discussed herein with respect to the coating morphology and the procedure for guidance toward technique optimization. The rapid preparation of ultrathin cross sections can assist the advancement of protective coatings on the surfaces of cathode particles for an efficient characterization of bulk–surface interfaces.

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Synthesis of nano-crystalline LiNbO3-decorated LiCoO2 and resulting high-rate capabilities

Cited by 19 publications

References 33 publications

Lithium Permeability Increase in Nanosized Amorphous Silicon Layers

Lithium Permeability Increase in Nanosized Amorphous Silicon Layers

Pyrrolidinium Containing Ionic Liquid Electrolytes for Li-Based Batteries

Enabling a High-Throughput Characterization of Microscale Interfaces within Coated Cathode Particles

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