Long life sealed nickel-zinc cell using a new separator

Sato, Yuichi; Kanda, M.; Niki, Hirokazu; Ueno, Mitsushi; Murata, Kenji; Shirogami, Tamotsu; Takamura, Tsutomu

doi:10.1016/0378-7753(83)80029-9

Cited by 38 publications

(20 citation statements)

References 3 publications

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“…This porous structure is usually observed at low current density experiments in a number of past studies. 2,7,12,13 These images suggest that the porous structures appear from the aggregated hexagonal hillocks with random orientations which initially are oriented hexagonal hillocks. The dependency of the crystalline structure of the initial zinc deposition on the current densities is explained in the past studies [22][23][24][25].…”

Section: Resultsmentioning

confidence: 94%

“…Since it is a classical problem, a number of methods have been proposed and explored to suppress the non-uniformity. In case of zinc, typical methods are the use of additives in electrode or electrolyte [9][10][11][12][13], flowing electrolyte [7,12], pulse charging [14], and optimization of substrates [15][16][17][18]. Here electrodeposition process of a metal generally consists of the following three steps: (1) diffusion of the metal ion (M z+ ) to an electrode surface in electrolyte, (2) generation of an adatom (M ad ) by a charge transfer reaction, and (3) surface diffusion of the adatom and crystallization (M ad → M crystal ).…”

Section: Introductionmentioning

confidence: 99%

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Non-uniform electrodeposition of zinc on the (0001) plane

et al. 2015

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Transition of zinc morphology and crystallographic orientations with increasing charge capacity is examined to identify the origin of non-uniform electrodeposition.Galvanostatic charge experiments for zinc are carried out for both polycrystalline and oriented zinc substrates to investigate the effects of electrodeposited zinc on electrodepositing zinc. The results show that the crystallographic orientations of the zinc substrates strongly affect the morphology of the electrodeposited zinc. Non-uniformity appears in the (0001)-oriented case prior to the polycrystalline, ሺ101 ത 0ሻand ሺ21 ത 1 ത 0ሻ-oriented cases. The (0001) plane initiates non-uniform zinc electrodeposition even in the polycrystalline case. It is attributed to the high density and low diffusivity of the ad-atom on the wide terrace structure. It is also indicated that porous structure appears from aggregated hexagonal hillocks with random orientations which initially are oriented hexagonal hillocks.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Non-uniform electrodeposition of zinc on the (0001) plane

et al. 2015

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“…12,16 Growth is hindered at slow current rates, [17][18] and 4 by the use of high stack pressure, 1,10,[19][20] although it is still not clear whether conditions exist where it is completely fail-safe to charge a Li metal battery. In general, since a bag or pouch-type cell lacks a high stack pressure 21 it more readily allows Li microstructures to grow between the Li metal and the separator than in a coin cell design.…”

Section: Introductionmentioning

confidence: 99%

Investigating Li Microstructure Formation on Li Anodes for Lithium Batteries by in Situ ⁶Li/⁷Li NMR and SEM

et al. 2015

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The growth of lithium microstructures during battery cycling has, to date, prohibited the use of Li metal anodes and raises serious safety concerns even in conventional lithium-ion rechargeable batteries, particularly if they are charged at high rates. The electrochemical conditions under which these Li microstructures grow have, therefore, been investigated by in situ nuclear magnetic resonance (NMR), scanning electron microscopy (SEM) and susceptibility calculations. Lithium metal symmetric bag cells containing LiPF 6 in EC: DMC electrolytes were used. Distinct 7 Li NMR resonances were observed due to the Li metal bulk electrodes and microstructures, the changes in peak positions and intensities being monitored in situ during Li deposition. The changes in the NMR spectra, observed as a function of separator thickness and porosity (using Celgard and Whatmann glass microfiber membranes) and different applied pressures, were correlated with changes in the type of microstructure, by using SEM. Isotopically enriched 6 Li metal electrodes were used against natural abundance predominantly 7 Li metal counter electrodes to investigate radiofrequency (rf) field penetration into the Li anode and to confirm the assignment of the higher frequency peak to Li dendrites. The conclusions were supported by calculations performed to explore the effect of the different microstructures on peak position/broadening, the study showing that Li NMR spectroscopy can be used as a sensitive probe of the both the amount and type of microstructure formation.

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“…Amongst different active electrode materials, metal oxides/hydroxides emerge as the potential materials, due to its cost‐effectiveness, high capacity, and environment‐friendly behaviour. Several alkali metals oxide/hydroxide have been studied for supercapacitors, which act as the promising candidates for the electrode …”

Section: Introductionmentioning

confidence: 99%

Influence of Cu on the Performance of Tuberose Architecture of Strontium Hydroxide Thin Film as a Supercapacitor Electrode

et al. 2018

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A simple, economical successive ionic layer adsorption and reaction (SILAR) method has been used for synthesizing 1, 2 and 3 at.% copper‐doped strontium hydroxide over a stainless‐steel (SS) substrate. X‐ray diffraction reveals the orthorhombic crystal structure of polycrystalline Cu‐doped Sr(OH)2. FTIR and Raman analyses explore the chemical bond analysis of the active material. The morphology of the Cu‐doped Sr(OH)2 was analyzed by using SEM. This shows novel hierarchical‐branched tuberose with flakes. The energy‐dispersive X‐ray spectroscopy (EDAX) also confirms the doping of Cu into Sr(OH)2. The electrochemical properties have been investigated by using cyclic voltammetry (CV) and galvanostatic charge−discharge measurements. It has been perceived that doping clearly affects the supercapacitive behavior. The specific capacity of the 3 at.% Cu‐doped Sr(OH)2 film electrode exhibits a maximum specific capacity of 817 C g−1 at 0.4 mA cm−1 in 1 M Na2SO4 electrolyte, but has a low cycle stability. The 2 at.% Cu‐doped sample shows high cycle stability by retrieving 71 % of its capacity after 5000 cycles. The relationship between the doping concentration and supercapacitive behavior has also been discussed. The good capacitive behavior and cycle stability of the Cu‐doped Sr(OH)2 gives the new perspective for the flexible electrode material, which can be used in the near future as an energy storage material.

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Long life sealed nickel-zinc cell using a new separator

Cited by 38 publications

References 3 publications

Non-uniform electrodeposition of zinc on the (0001) plane

Non-uniform electrodeposition of zinc on the (0001) plane

Investigating Li Microstructure Formation on Li Anodes for Lithium Batteries by in Situ ⁶Li/⁷Li NMR and SEM

Influence of Cu on the Performance of Tuberose Architecture of Strontium Hydroxide Thin Film as a Supercapacitor Electrode

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Long life sealed nickel-zinc cell using a new separator

Cited by 38 publications

References 3 publications

Non-uniform electrodeposition of zinc on the (0001) plane

Non-uniform electrodeposition of zinc on the (0001) plane

Investigating Li Microstructure Formation on Li Anodes for Lithium Batteries by in Situ 6Li/7Li NMR and SEM

Influence of Cu on the Performance of Tuberose Architecture of Strontium Hydroxide Thin Film as a Supercapacitor Electrode

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Investigating Li Microstructure Formation on Li Anodes for Lithium Batteries by in Situ ⁶Li/⁷Li NMR and SEM