Electrochemical lithiation of silicon electrodes: neutron reflectometry and secondary ion mass spectrometry investigations

@article{Jerliu2017ElectrochemicalLO,
  title={Electrochemical lithiation of silicon electrodes: neutron reflectometry and secondary ion mass spectrometry investigations},
  author={Bujar Jerliu and Lars D{\"o}rrer and Erwin H{\"u}ger and Beatrix Kamelia Seidlhofer and Roland Steitz and G{\"u}nter Prof. Dr.-Ing. Borchardt and Harald Schmidt},
  journal={International Journal of Materials Research},
  year={2017},
  volume={108},
  pages={999 - 1007}
}
Abstract In-situ neutron reflectometry and ex-situ secondary ion mass spectrometry in combination with electrochemical methods were used to study the lithiation of amorphous silicon electrodes. For that purpose specially designed closed three-electrode electrochemical cells with thin silicon films as the working electrode and lithium as counter and reference electrodes were used. The neutron reflectometry results obtained in-situ during galvanostatic cycling show that the incorporation… Expand
On the Lithiation Mechanism of Amorphous Silicon Electrodes in Li-Ion Batteries
Amorphous silicon is a high-capacity negative electrode material for use in advanced lithium-ion batteries. We investigated the mechanism of Li incorporation into and removal from this materialExpand
Surface structure inhibited lithiation of crystalline silicon probed with operando neutron reflectivity
Abstract Silicon is a promising anode material for lithium ion batteries due to its ten times higher specific capacity compared to commercially used graphite anodes. However, silicon anodes sufferExpand
Silicon–Germanium bilayer sputtered onto a carbon nanotube sheet as anode material for lithium–ion batteries
Abstract In this work, multiwalled carbon nanotube-silicon/germanium (MWCNT-Si/Ge) electrodes were prepared by layer-by-layer deposition of Si and Ge films onto an MWCNT sheet using RF magnetronExpand
Quantitative spatiotemporal Li profiling using nanoindentation
Abstract The rate capability and lifetime of Li-ion batteries is largely dictated by the composition dynamics of the electrodes. We set forth a nanoindentation approach to probe the spatiotemporal LiExpand

References

SHOWING 1-10 OF 345 REFERENCES
Neutron reflectometry studies on the lithiation of amorphous silicon electrodes in lithium-ion batteries.
TLDR
The results show that the change in Li content in amorphous silicon and the corresponding volume expansion can be monitored, that the formation of the solid electrolyte interphase becomes visible and that an irreversible capacity loss is present. Expand
A Secondary Ion Mass Spectrometry Study on the Mechanisms of Amorphous Silicon Electrode Lithiation in Li-Ion Batteries
Abstract Electrodes made of amorphous silicon are a promising alternative to graphite as anode material for the next generation of high-capacity Li-ion batteries. In order to optimize such batteriesExpand
Volume Expansion during Lithiation of Amorphous Silicon Thin Film Electrodes Studied by In-Operando Neutron Reflectometry
Amorphous silicon is a promising high-capacity anode material for the next generation of lithium-ion batteries. However, the enormous volume expansion of the active material during lithiation up toExpand
In Situ Conductivity, Impedance Spectroscopy, and Ex Situ Raman Spectra of Amorphous Silicon during the Insertion/Extraction of Lithium
The electrical conductivity and the impedance behavior of thin layers of amorphous silicon (a-Si), which are promising anode materials for lithium-ion batteries, were monitored in situ during theExpand
Li-ion diffusion in amorphous Si films prepared by RF magnetron sputtering: A comparison of using liquid and polymer electrolytes
Abstract Amorphous Si films were prepared by radio frequency magnetron sputtering on Cu substrates and were characterized by X-ray diffraction and scanning electron microscopy. The potentialExpand
In situ atomic-scale imaging of electrochemical lithiation in silicon.
TLDR
It is shown that in situ transmission electron microscopy can be used to study the dynamic lithiation process of single-crystal silicon with atomic resolution and observe a sharp interface between the crystalline silicon and an amorphous Li(x)Si alloy. Expand
Properties of amorphous Si thin film anodes prepared by pulsed laser deposition
Amorphous Si (a-Si) thin film anodes were prepared by pulsed laser deposition (PLD) at room temperature. Structures and properties of the thin films were investigated using X-ray diffraction (XRD),Expand
In situ TEM of two-phase lithiation of amorphous silicon nanospheres.
TLDR
In situ transmission electron microscopy is used to observe the lithiation/delithiation of amorphous Si nanospheres, revealing that the first lithiation occurs via a two-phase mechanism, contrary to previous understanding and has important consequences for mechanical stress evolution during lithiation. Expand
Lithium insertion into amorphous silicon thin-film electrodes
Abstract The electrochemical lithium insertion into a-Si:H thin-film electrodes, CVD-grown on stainless-steel substrates at 100 and 250 °C, is studied using chronopotentiometry, cyclic voltammetry,Expand
A nanosized silicon thin film as high capacity anode material for Li-ion rechargeable batteries
Abstract Silicon thin film with thickness in range 1000–5300 A deposited on rough Cu foil by a radio frequency magnetron sputtering is used as anode materials for Li-ion rechargeable batteries. TheExpand
...
1
2
3
4
5
...