Lithium-Silicon System

The lithium-silicon system has also been of interest for use in the negative electrodes of elevated-temperature molten salt electrolyte lithium batteries. A composition containing 44 wt.% Li, where Li/Si=3.18, has been used in commercial 

Experiments have been performed to study both the thermodynamic and kinetic 

As a result, the cell voltage will decrease during the discharge, regardless of the behavior of the positive electrode. 

Experiments have been performed to study both the thermodynamic and kinetic properties of compositions in this system [37], and the composition dependence of the equilibrium potential at 415 °C is shown in Fig. 4. It is seen that the com- 

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The relation between the potential-composition data for these two systems under equilibrium conditions is shown in Fig. 13. It is seen that the phase Li2hSn (Lil3Sn5) is stable over a potential range that includes the upper two-phase reconstitution reaction plateau in the lithium-silicon system. Therefore, lithium can react with Si to form the phase Li, 7 S i... 

Wen CJ, Huggins RA. Chemical diffusion in intermediate phase in the lithium-silicon system. J Solid State Chem 1981 37 271-278. 

Sharma RA, Seefurth RN (1976) Thermodynamic properties of the lithium-silicon system. J Electrochem Soc 123 1763-1768... 

Table 2. Estimated data relating to lithium-silicon-based ternary systems at 400 °C.

Weydanz WJ, Wohlfahrt-Mehrens M, Huggins RA. A room temperature study of the binary lithium-silicon and the ternary lithium-chromium-silicon system for use in rechargeable lithium batteries. 

Murayama M, Kanno R, Me M, Ito S, Hata T, No Sonoyama, Kawamoto Y (2002) Synthesis of new lithium ionic conductor Thio-LISICON lithium silicon sulfides system. J Solid State Chem 168 140-148... 

The first example that was demonstrated was the use of the phase with the nominal composition LiisSns as the matrix, in conjxmction with reactant phases in the Hthium-silicon system at temperatures near 400 °C. This is an especially favorable case, due to the high chemical diffusion coefficient or lithium in the LisSns phase. 

The reversible cycling of up to 3.8 lithium atoms per germanium atom in the nanocrystalline electrode is considerably larger than the capacities measured in the analogous silicon system, which exhibited a reversible capacity of 1.1 lithium atoms per silicon atom. The enhanced lithium uptake is attributed to the higher diffiisivity of lithium in germanium at room temperature (Dce = 400 ZJsi). 

Instrumentation. Traditional methods of alpha and beta spectrometry instrumentation have changed little over the past decade. Alpha spectrometric methods typically rely on semi-conductor or lithium-drifted silicon detectors (Si(Li)), or more historically gridded ion chambers, and these detection systems are still widely used in various types of uranium-series nuclide measurement for health, environmental, and... 

In addition to the telluration of a silylene, another unique synthetic route has been developed for the silicon-tellurium double bond system. Recently, it has been reported that the exhaustive reduction of an overcrowded dibromosilane Tbt(Dip)SiBr2 (61) with an excess amount (more than 4 equiv.) of lithium... 

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