Ion Mobility in Crystals of a Mixed-Alkali Ferrite: K[sub x]Na[sub 1−x]Fe[sub 7]O[sub 11]

Hever, K.O.

doi:10.1149/1.2411442

Cited by 26 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Early studies of intercalation focused on highly covalent oxides or sulfides (W, Mo, V, Nb, and Ti), whose corner or edge sharing creates channels for facile mass transport and ion conduction. − Treating it as a variant of a symmetrical concentration cell using two identical hosts as described by Hever in 1968, Armand established an early mathematical model based on intercalation cells with two different hosts, although at the time it remained unclear which materials serve as ideal hosts. The first actual unsymmetrical intercalation cell that shuttled Li + back and forth was demonstrated by Lazzari and Scrosati .…”

Section: Intercalation Bypassmentioning

confidence: 99%

Before Li Ion Batteries

2018

View full text Add to dashboard Cite

This Review covers a sequence of key discoveries and technical achievements that eventually led to the birth of the lithium-ion battery. In doing so, it not only sheds light on the history with the advantage of contemporary hindsight but also provides insight and inspiration to aid in the ongoing quest for better batteries of the future. A detailed retrospective on ingenious designs, accidental discoveries, intentional breakthroughs, and deceiving misconceptions is given: from the discovery of the element lithium to its electrochemical synthesis; from intercalation host material development to the concept of dual-intercalation electrodes; and from the misunderstanding of intercalation behavior into graphite to the comprehension of interphases. The onerous demands of bringing all critical components (anode, cathode, electrolyte, solid-electrolyte interphases), each of which possess unique chemistries, into a sophisticated electrochemical device reveal that the challenge of interfacing these originally incongruent components often outweighs the individual merits and limits in their own properties. These important lessons are likely to remain true for the more aggressive battery chemistries of future generations, ranging from a revisited Li-metal anode, to conversion-reaction type chemistries such as Li/sulfur, Li/oxygen, and metal fluorides, and to bivalent cation intercalations.

show abstract

Section: Intercalation Bypassmentioning

confidence: 99%

Before Li Ion Batteries

2018

View full text Add to dashboard Cite

show abstract

“…In the temperature range 1100~176 both Volpe and Reddy (7) and Crow (8) have found that nickel diffusivities decrease with decreasing oxygen pressure in the region 1 atm > Po2 > 10 -7 atm, with the pressure dependence varying with temperature and Poe. The results were interpreted in terms of nickel diffusion via both singly and doubly charged nickel vacancies.…”

Section: Diffusion Of Lcr In Nio Single Crystalsmentioning

confidence: 99%

“…being the single-cell reaction (z : 2) 0.5 O2 + 2 Li ~ Li20 (soln) [7] By taking into account the equilibrium constant of reaction [1], one obtains, for the emf of cell [4] 0,5 LifO…”

Section: Rt X~mentioning

confidence: 99%

Study on the Lithium Oxide-Nickel Oxide System

Pizzini¹,

Monari²,

Morlotti³

1971

J. Electrochem. Soc.

View full text Add to dashboard Cite

Thermodynamic activity measurements of dissolved lithium oxide in normalNiO‐Li2O solid solutions have been carried out within the homogeneity range to the solubility limit (about 33 a/o lithium). The measurements have been carried out by means of suitable galvanic cells, of the type normalPt/normalNiO‐Li2Ofalse(x2false)//normalintermediate electrolyte//normalNiO‐Li2Ofalse(x1false)/normalPt where α‐Li2SO4 and β‐spodumene have each been used as the intermediate electrolyte.

show abstract

“…Oxide thickness for short oxidation time and/or low oxidation temperature is proportional to the time and to the square root of the oxidation time for long time and/or high temperature. The rate constant in the former case (linear rate constant) is limited by the surface reaction rate for oxidation and the rate constant in the latter case (parabolic rate constant) is limited by the diffusion rate of oxidant in the oxide film (1). It was reported that these rate constants depend on the impurity concentration in silicon as well as the temperature and oxidizing ambient.…”

Section: Thermal Oxidation Of Arsenic-diffused Silicon Shinji Ohkawa ...mentioning

confidence: 99%

Mixed Conductivity in LiFe5 O 8

Dudley

Steele

1978

J. Electrochem. Soc.

View full text Add to dashboard Cite

The lithium ion and electronic conductivities of lithium ferrite spinel, LiFe5Os, have been investigated by four-point d-c techniques. The ionic conductivity is relatively low, less than 10 -5 ~-1 cm-1 at 300"C. Transients observed in two-point d-e electronic conductivity measurements carried out in oxygen appear to be due to a surface oxidation process rather than to the ionic component of the total conductivity.In the Rb~O-Fe203, K20-Fe203, and Na20-K20-Fe20 systems, analogues of the E-alumina structure can be prepared directly and have been shown to be good ionic as well as electronic conductors [e.g., (1,2)]. On the other hand, direct synthesis of the lithium analogue has not been reported, and under similar conditions an inverse spinel, Fe23+[Li+Fesz+]Os results instead. In a recent paper (3) it was reported that despite its essentially close-packed structure, there were indications that a significant ionic conductivity was present in this compound at temperatures around 309~ This led to a brief investigation by the present authors because the possibility of obtaining moderate values of ionic conductivity in this large class of compounds would be of considerable interest both theoretically and technologically. * Electrochemical Society Active Member. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 192.236.36.29 Downloaded on 2015-04-13 to IP Vo/. 125, No. 12 CONDUCTIVITY IN LiFesO8 1997 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 192.236.36.29 Downloaded on 2015-04-13 to IP

show abstract

Ion Mobility in Crystals of a Mixed-Alkali Ferrite: K[sub x]Na[sub 1−x]Fe[sub 7]O[sub 11]

Cited by 26 publications

References 4 publications

Before Li Ion Batteries

Before Li Ion Batteries

Study on the Lithium Oxide-Nickel Oxide System

Mixed Conductivity in LiFe5 O 8

Contact Info

Product

Resources

About