A high voltage magnesium battery based on H2SO4-doped (PVA)0.7(NaBr)0.3 solid polymer electrolyte

Sheha, E.; El‐Mansy, M. K.

doi:10.1016/j.jpowsour.2008.09.046

Cited by 59 publications

(30 citation statements)

References 14 publications

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“…However, the capacity fell below 30 mA h g −1 within 30 cycles. MnO 2 has also been used to study polymer electrolytes [213,215,216,218,219]. Despite initial capacities as high as 270 mA h g −1 [219], long term stability has not been reported thus far, on account of Mg metal passivation on the anode side and kinetic limitations of electrolytic MnO 2 type type …”

Section: Science China Materialsmentioning

confidence: 99%

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

2015

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to develop and install renewable energy harvesting technologies [3]. However, their successful implementation will be dependent on reliable and robust storage devices since harvesting solar and wind energy is inherently intermittent and the majority of consumption targets cannot be readily tethered to the grid.As energy storage devices, batteries possess high portability, high energy density, high Coulombic efficiency, and long cycle life. They are ideal power sources for portable devices, automobiles, and backup power supplies; accordingly, batteries power nearly all of our mobile electronics and are used to improve the efficiency of hybrid electric vehicles [4,5]. Unfortunately, considerable improvements in performance are still required in order to meet the demands of advanced portable devices and achieve energy sustainability (e.g., through smart grid and electric vehicle technologies) [6]. These enduring needs have driven intensive research investments. While efforts have been successful, there is still significant room for improvement regarding the development and understanding of electrode materials [7]. The overall capacity and potential cycling window of many electrode materials are limited to prevent degradation over long term cycling. In addition to exploring new electrode materials, there have been strong efforts to improve those that are already utilized. Expense reduction is a priority as approximately 23% and 8% of the overall battery pack costs stem from the respective cathode and anode active materials alone [8].An alkali-ion battery consists of several electrochemical cells connected in parallel and/or in series to provide a designated current or voltage. Each electrochemical cell has two electrodes separated by an electrolyte that is electrically insulating but ionically conductive. During discharge, when the alkali-ion battery operates as a galvanic cell, alkali ions exit the negative electrode (typically carbon) and insert themselves into the positive electrode while electronsThe need for economical and sustainable energy storage drives battery research today. While Li-ion batteries are the most mature technology, scalable electrochemical energy storage applications benefit from reductions in cost and improved safety. Sodium-and magnesium-ion batteries are two technologies that may prove to be viable alternatives. Both metals are cheaper and more abundant than Li, and have better safety characteristics, while divalent magnesium has the added bonus of passing twice as much charge per atom. On the other hand, both are still emerging fields of research with challenges to overcome. For example, electrodes incorporating Na + are often pulverized under the repeated strain of shuttling the relatively large ion, while insertion and transport of Mg 2+ is often kinetically slow, which stems from larger electrostatic forces. This review provides an overview of cathode and anode materials for sodium-ion batteries, and a comprehensive summary of research on cathodes for magnesium-ion batteries. In additi...

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Section: Science China Materialsmentioning

confidence: 99%

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

2015

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“…It has a carbon chain backbone with hydroxyl groups attached to methane carbons. These OH-groups can be a source of hydrogen bonding and hence assist the formation of polymer electrolytes [1][2][3][4][5][6]. Recent studies have dominated lithium ion conducting systems for their potential use in solid-state batteries with high cell voltages and energy densities.…”

Section: Introductionmentioning

confidence: 99%

“…Sulfuric acid H 2 SO 4 , is a strong mineral acid that has a high electrical conductivity due to an intra-molecular proton-switch mechanism, its incorporation in a polymer system may be expected to enhance its electrical performance [1,10]. We propose to develop a radically new, alternative ionic-conducting electrolyte (or membrane) that is based on compounds whose chemistry and properties are intermediate between those of a normal acid, such as H 2 SO 4 , and a normal salt, such as NaI and not a hydrated polymer.…”

Section: Introductionmentioning

confidence: 99%

Structural and electrical properties of pure and H2SO4 doped (PVA)0.7(NaI)0.3 solid polymer electrolyte

Badr

Sheha

Bayomi

et al. 2009

Ionics

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Solid polymer electrolytes (SPE) based on poly-(vinyl alcohol) (PVA) 0.7 and sodium iodide (NaI) 0.3 complexed with sulfuric acid (SA) at different concentrations were prepared using solution casting technique. The structural properties of these electrolyte films were examined by X-ray diffraction (XRD) studies. The XRD data revealed that sulfuric acid disrupt the semi-crystalline nature of (PVA) 0.7 (NaI) 0.3 and convert it into an amorphous phase. The proton conductivity and impedance of the electrolyte were studied with changing sulfuric acid concentration from 0 to 5.1 mol/liter (M). The highest conductivity of (PVA) 0.7 (NaI) 0.3 matrix at room temperature was 10 −5 S cm −1 and this increased to 10 −3 S cm −1 with doping by 5.1 M sulfuric acid. The electrical conductivity (σ) and dielectric permittivity (ε′) of the solid polymer electrolyte in frequency range (500 Hz-1 MHz) and temperature range (300-400) K were carried out. The electrolyte with the highest electrical conductivity was used in the fabrication of a sodium battery with the configuration Na/SPE/MnO 2 . The fabricated cells give open circuit voltage of 3.34 V and have an internal resistance of 4.5 kΩ.

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“…The values of t The lm with the highest ionic conductivity was used for cell fabrication. Figure 11a shows the complete discharge curve of the battery, it shows that the discharge was sustained for 68 h. The value of the discharge capacity C was evaluated from the equation [26]:…”

Section: Methodsmentioning

confidence: 99%

Effect of Tetraethylene Glycol Dimethyl Ether on Electrical, Structural and Thermal Properties of PVA-Based Polymer Electrolyte for Magnesium Battery

et al. 2015

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The aim of the contribution is to introduce a high performance magnesium conducting polymer electrolytes (PEs) comprising hybrid of poly(vinyl alcohol) (PVA), magnesium bromide (MgBr2) and tetraethylene glycol dimethyl ether (TEGDME) as plasticizer are prepared at various compositions by solution cast technique. X-ray diraction and thermogravimetric analyses suggest a substantial structural modication, decrease in crystallinity and various interactions in the polymer electrolyte components due to addition of TEGDME. Also there is a marked decrease in Tg with increasing TEGDME. The conductivity conformation with the addition of plasticizer which can be explained on the basis of dissociation of ion aggregates formed in PVAMgBr2 polymer electrolytes at higher concentrations of the salt. The ionic conductivity of the polymer electrolyte increased with addition of salt and plasticizer reached to the highest conductivity value of ≈10 −6 S cm −1 at 0.8 ml TEGDME. The frequency dependence of AC conductivity obeys the Jonscher power law. The estimated value of Mg +2 ion transference number is found to be 0.68 for high conducting lm. The open circuit voltage of a solid state battery which based on the optimum polymer electrolyte with a conguration Mg|PE|V2O5 is 1.5 V. Also this battery has exhibited a discharge capacity ≈ 3.78 mAh/g. The discharge characteristics are found to be satisfactory as a laboratory cell.

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A high voltage magnesium battery based on H2SO4-doped (PVA)0.7(NaBr)0.3 solid polymer electrolyte

Cited by 59 publications

References 14 publications

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

Beyond Li-ion: electrode materials for sodium- and magnesium-ion batteries

Structural and electrical properties of pure and H2SO4 doped (PVA)0.7(NaI)0.3 solid polymer electrolyte

Effect of Tetraethylene Glycol Dimethyl Ether on Electrical, Structural and Thermal Properties of PVA-Based Polymer Electrolyte for Magnesium Battery

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