Intermetallic insertion electrodes derived from NiAs-, Ni2In-, and Li2CuSn-type structures for lithium-ion batteries

Phase structure of electrodeposited alloys

Zusammenfassung Die Kristallstruktur von NiSn ist orthorhombisch und enthalt 32 Atome in der Elementarzelle. Die Struktur ergibt sich durch Fortlassen von Ni-Ketten aus einer teilaufgefullten NiAs Struktur und gehort zu einer Strukturfamilie, die die Strukturtypen von Ni 3 Sn 4 , CoGe, Ni 4 GaGe 3 und CoSn umfasst. Es wird wahrscheinlich gemacht, dass die verschiedenen Stapelungen eines festen Bauelements durch die Ortskorrelation der Rumpfelektronen verursacht sind.

Kristallstruktur von NiSn

The effects of the impurities Co2+, Cu2+, Fe2+, Fe3+ on the current efficiency, physical appearance, purity, crystallographic orientation and surface morphology of the deposit and on nickel deposition polarization behaviour during nickel electrowinning were determined. The current efficiency did not change significantly in the presence of these impurities over the concentration range studied, but certain changes in the purity and physical appearance of the deposit were observed. Based on the physical appearance of the electrodeposited nickel, the tolerance limits of the impurities in the electrolyte are reported. The tolerance limit of Co2+ was a maximum at 500 p.p.m. and a minimum at 5 p.p.m. in the case of Fe2+. No deviation of nickel structure from fcc was observed in the presence of any of these impurities but the peak height values for different orientations showed variations with all the impurities and the values also changed with increase in the impurity concentrations. The surface morphology of electrodeposited nickel also changed in the presence of the impurities. The potentiodynamic scan curves for electrodeposition of nickel showed deviations in the presence of all the impurities except Cu2+. Based on the results, an attempt is made to correlate the effects of the various factors investigated.

The effect of Co2+, Cu2+, Fe2+ and Fe3+ during electrowinning of nickel

An investigation of the effect of fluoride concentration on alloy deposition from tin-nickel electrolytes is described. Evidence for the existence and stability of the complexes SnF4—and SnF6—is ad...

Progress in Tin-Nickel Electroplating

http://jes.ecsdl.org/content/100/3/107.full.pdf

J. W. Cuthbertson

Papers

Electrodeposition of Tin‐Nickel Alloy Plate from Chloride‐Fluoride Electrolytes