Voltammetric and electrochemical impedimetric behavior of silica-based gel electrolyte for valve-regulated lead-acid battery

Gençten, Metin; Dönmez, Koray B.; Şahin, Yücel; Pekmez, Kadi̇r; Suvacı, Ender

doi:10.1007/s10008-014-2507-y

Cited by 57 publications

(87 citation statements)

References 22 publications

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“…Tantichanakul et al improved the discharge capacity of VRLA batteries by adding of vanaline in gelled system [11]. Performance effects of sodium sulfate and magnesium sulfate were studied in our previous study and these sulfate salts combined well with gelled system [15]. All of these studies show that good combination of additives with gelled agents has a great potential to improve the capacity, cyclic life and structure of gelled VRLA batteries.…”

Section: Introductionmentioning

confidence: 99%

Section: Preparation Of Electrolytesmentioning

confidence: 99%

“…Concentration of sulfuric acid and fumed silica are the key parameters to affect the performance and capacity of VRLA batteries [15,19,20]. The optimum amount of sulfuric acid and fumed silica those were determined in our previous study as 30 wt% and 6 wt%, respectively, were used in this study [15]. In order to investigate the effect of inorganic additives, Al2O3 (Sigma-Aldrich, ≥ 98%, St. Louis, USA), B2O3 (Sigma-Aldrich, ≥ 99%, St. Louis, USA) and TiO2 (Sigma-Aldrich, ≥ 99%, St. Louis, USA) were added into the electrolyte.…”

Section: Preparation Of Electrolytesmentioning

confidence: 99%

“…Most of the studies were focused on fumed silica based gel electrolyte systems because of the advantages of fumed silica such as high capacity, high stability and good thixotropy [11,15]. Fumed silica is often used as a gel agent for gel VRLA batteries.…”

Section: Introductionmentioning

confidence: 99%

“…In the AGM system, sulfuric acid is soaked into a kind of glass mat and this mat separator is used as matrix for electrolyte. In the gelled electrolyte system, silica sols, colloidal silica, fumed silica and some organic siloxane have been used to obtain a three dimensional network gel which absorbs sulfuric acid [4,8,[11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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A Novel Gel Electrolyte for Valve-Regulated Lead Acid Battery

Gençten¹,

Dönmez²,

Şahin³

2017

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

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A novel gel electrolyte system used in lead-acid batteries was investigated in this work. The gel systems were prepared by addition of different amount of Al2O3, TiO2 and B2O3 into the gelled system consisting of 6 wt% fumed silica and 30 wt% sulfuric acid solution for the first time. The anodic peak currents and peak redox capacities of the gel electrolytes were characterized by cyclic voltammetric method. When B2O3 and Al2O3 were used as additives in fumed silica based gel electrolyte system, the anodic peak currents and peak redox capacities decreased. However, the investigated parameters in cyclic voltammetry (anodic peak current and capacities) increased by the adding of 3.0 wt% of TiO2 in the fumed silica based gel system. The solution and charge transfer resistances of the gel electrolytes were investigated by electrochemical impedance spectroscopy. While the solution resistances were lower in gel systems having different amount additives than pure fumed silica based gel, the charge transfer resistance was the lowest in gel electrolytes consisting fumed silica and fumed silica-TiO2. The morphological differences of gelled systems were elucidated by scanning electron microscopic and optic microscopic analysis. The battery performances were studied by obtaining discharge curves of prepared gel electrolytes. The performance of gelled systems were higher than that of non-gelled electrolyte at room temperature. The mixture of fumed silica-TiO2 was suggested an alternative gel formulation for gel valve-regulated lead acid batteries. TiO2 can be a useful additive for gel-VRLA batteries.

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Section: Introductionmentioning

confidence: 99%

Section: Preparation Of Electrolytesmentioning

confidence: 99%

Section: Preparation Of Electrolytesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Novel Gel Electrolyte for Valve-Regulated Lead Acid Battery

Gençten¹,

Dönmez²,

Şahin³

2017

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

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Enhancing Electrocatalytic Synthesis of Glycine with CuPb_1ML Electrode Synthesized via Pb UPD

Broersen,

de Groot,

Bruggeman

et al. 2024

ChemCatChem

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In the field of reductive organic electrosynthesis, the hydrogen evolution reaction (HER) is considered a parasitic reaction that lowers the Faradaic efficiency of the synthesis. Metals with a high overpotential for HER are often used to prevent this. However, this limits the catalytic materials that can be used in these reactions. To expand upon the scope of available electrocatalysts, we prepared a CuPb electrode via underpotential deposition (UPD). We thereby created an electrocatalyst with a single monolayer of Pb, CuPb1ML, in which Pb weight loading is only 415 ng cm‐2, yet its properties could still effectively inhibit HER. The CuPb1ML electrode was used in the electrosynthesis of glycine from oxalic acid and hydroxylamine. This reaction served as a model for a C–N bond forming reaction in acidic aqueous media. The CuPb1ML electrode was compared against a pure Pb and Cu metal electrode. The CuPb1ML electrode showed a Faradaic efficiency for glycine production of 57%, which was 9‐fold higher than Cu and rivaled the Pb electrode. The catalytic activity of CuPb1ML was 211 µmol h‐1 cm‐2, which is higher than both Cu and Pb. The mechanism of the electroreduction was then studied via in situ Fourier Transform Infra‐Red (FTIR) spectroscopy.

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The Possible Mechanism of Improving the Performance of Lead‐Acid Batteries by Using Aluminum Ions to Influence the Gel Structure

Yang,

Cao,

et al. 2024

Energy Tech

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Gel lead‐acid batteries have the advantages of no acid leakage, no maintenance, and a long cycle life. In this article, it was found that Al3+ in the gel electrolyte can shorten the gel time and improve the stability of the gel. The battery test results show that the HRPSoC cycle life of the gel battery can be significantly improved by adding Al3+. In comparison to blank gel batteries without Al3+, HRPSoC cycle life is 8.2 times higher. Additionally, the gel battery with added Al3+ has a 0.5C discharge capacity of 1.8 Ah, which is 2.5 times that of the blank gel battery. The added Al3+ also demonstrates good capacity stability and still retains a capacity of 1.7 Ah after 150 discharge cycles. The kinetic simulation shows that Al3+ may participate in the formation of a silicon gel system and tend to gather around Si atoms to affect the properties of the gel electrolyte.

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Voltammetric and electrochemical impedimetric behavior of silica-based gel electrolyte for valve-regulated lead-acid battery

Cited by 57 publications

References 22 publications

A Novel Gel Electrolyte for Valve-Regulated Lead Acid Battery

A Novel Gel Electrolyte for Valve-Regulated Lead Acid Battery

Enhancing Electrocatalytic Synthesis of Glycine with CuPb_1ML Electrode Synthesized via Pb UPD

The Possible Mechanism of Improving the Performance of Lead‐Acid Batteries by Using Aluminum Ions to Influence the Gel Structure

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Voltammetric and electrochemical impedimetric behavior of silica-based gel electrolyte for valve-regulated lead-acid battery

Cited by 57 publications

References 22 publications

A Novel Gel Electrolyte for Valve-Regulated Lead Acid Battery

A Novel Gel Electrolyte for Valve-Regulated Lead Acid Battery

Enhancing Electrocatalytic Synthesis of Glycine with CuPb1ML Electrode Synthesized via Pb UPD

The Possible Mechanism of Improving the Performance of Lead‐Acid Batteries by Using Aluminum Ions to Influence the Gel Structure

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Enhancing Electrocatalytic Synthesis of Glycine with CuPb_1ML Electrode Synthesized via Pb UPD