Enhancement of Discharge Capacity of Mg/MnO&lt;SUB&gt;2&lt;/SUB&gt; Primary Cell with Nano-MnO&lt;SUB&gt;2&lt;/SUB&gt; as Cathode

Srither, S. R.; Selvam, M.; Arunmetha, S.; Yuvakkumar, R.; Saminathan, K.; Rajendran, V.

doi:10.1166/sam.2013.1598

Cited by 9 publications

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“…Solution B, C and D have more negative corrosion potentials (E corr ) than solution A. Particularly, solution D can reach −1.574 V implying that the addition of Na 3 PO 4 and SDBS can improve the potential of Mg-air batteries. In addition, they still show smaller corrosion current density (i corr ) than solution A.…”

Section: Resultsmentioning

confidence: 98%

“…1,2 There are lots of advantages of Mg-air battery, such as high theoretical potential (3.09 V), high specific energy density (6.8 kWh • kg −1 ), neutral electrolyte, environmental friendliness, and low cost. [3][4][5] Although Mg-air battery has a promising future, there are still some problems remarkably limiting its development and delaying its application in daily life. One of the major problems is anodic polarization during battery discharge.…”

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confidence: 99%

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Investigation of Sodium Phosphate and Sodium Dodecylbenzenesulfonate as Electrolyte Additives for AZ91 Magnesium-Air Battery

Wang

et al. 2018

J. Electrochem. Soc.

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This paper reports on the improvement of discharge performances of magnesium-air batteries by adding sodium phosphate and sodium dodecylbenzenesulfonate to sodium chloride aqueous solution. Four different electrolytes are tested. Results obtained show that the discharge potential and anode utilization of magnesium-air battery increase significantly with addition of the additives. With an electrolyte of 3.5 wt% sodium chloride+0.5 g · L −1 sodium phosphate, the discharge potential increases from 1.120 V to 1.150 V and the anode utilization increases from 44.1% to 49.1%. The self-corrosion rate of anode has a tendency to decrease with addition of the additives. In solution of 3.5 wt% sodium chloride+0.5 g · L −1 sodium dodecylbenzenesulfonate +0.5g · L −1 sodium phosphate, the self-corrosion is low and the inhibition efficiency can reach 95.2%. Magnesium-air (Mg-air) battery plays an increasingly significant role in power source energy and storage devices.1,2 There are lots of advantages of Mg-air battery, such as high theoretical potential (3.09 V), high specific energy density (6.8 kWh · kg −1 ), neutral electrolyte, environmental friendliness, and low cost. 3-5Although Mg-air battery has a promising future, there are still some problems remarkably limiting its development and delaying its application in daily life. One of the major problems is anodic polarization during battery discharge. [6][7][8] As the total reaction of Mgair battery (Eq. 1) shows:The discharge product is magnesium hydroxide which has a tendency to attach to the surface of anode. It can reduce the reactionsurface area leading to a decrease of discharge potential when battery discharges in a constant-current mode. As we all know, the potential of Mg is −2.37 V (vs · SHE) and it can react spontaneously with aqueous solution according to the following equation:This wasteful self-corrosion leads to low utilization efficiency during discharge process. 9,10 There are numerous efforts to reduce selfcorrosion of magnesium, focusing either on how to improve anode behaviors [11][12][13] or how to optimize electrolyte composition. 14,15 Compared to studies for anode improvement, there are few studies aimed at electrolyte optimization. Furthermore, adding additives to the electrolyte is known to be a convenient and effective method. For example, the self-discharge capacity is significantly increased by adding water soluble graphene to NaCl solution.14 Jing et al. 15 found that when NaF and Na 3 PO 4 were used as additives to electrolyte Mg-MnO 2 cell demonstrated an excellent discharge performance. And sodium dodecylbenzenesulfonate (SDBS) as a good organic inhibitor can work together with the Na 2 SiO 3 on the AZ31 magnesium alloy in 1% NaCl. 16Although electrolyte is one of the most crucial factors, additive research is few comparing the anode materials. Up to now, Mg-air batteries with Na 3 PO 4 and SDBS as additives have never been studied. It is known that sodium chloride aqueous solution (3.5% NaCl) is the most suitable electrolyte for Mg-air batt...

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Section: Resultsmentioning

confidence: 98%

mentioning

confidence: 99%

Investigation of Sodium Phosphate and Sodium Dodecylbenzenesulfonate as Electrolyte Additives for AZ91 Magnesium-Air Battery

Wang

et al. 2018

J. Electrochem. Soc.

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“…45 For MnO 2 nanoparticles, shortening the particle size can increase the discharge capacity and energy density. 61 The nanostructured MnO 2 -graphene composites improve the conductivity, leading to better performance than bare MnO 2 . 62 The main problems of Mg-MnO 2 batteries focus on the anode and the electrolyte, the nanostructured MnO 2 only partially improves the performance.…”

Section: Mg-mno 2 Batteriesmentioning

confidence: 98%

Nanostructured Mn-based oxides for electrochemical energy storage and conversion

et al. 2015

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Batteries and supercapacitors as electrochemical energy storage and conversion devices are continuously serving for human life. The electrochemical performance of batteries and supercapacitors depends in large part on the active materials in electrodes. As an important family, Mn-based oxides have shown versatile applications in primary batteries, secondary batteries, metal-air batteries, and pseudocapacitors due to their high activity, high abundance, low price, and environmental friendliness. In order to meet future market demand, it is essential and urgent to make further improvements in energy and power densities of Mn-based electrode materials with the consideration of multiple electron reaction and low molecular weight of the active materials. Meanwhile, nanomaterials are favourable to achieve high performance by means of shortening the ionic diffusion length and providing large surface areas for electrode reactions. This article reviews the recent efforts made to apply nanostructured Mn-based oxides for batteries and pseudocapacitors. The influence of structure, morphology, and composition on electrochemical performance has been systematically summarized. Compared to bulk materials and notable metal catalysts, nanostructured Mn-based oxides can promote the thermodynamics and kinetics of the electrochemical reactions occurring at the solid-liquid or the solid-liquid-gas interface. In particular, nanostructured Mn-based oxides such as one-dimensional MnO2 nanostructures, MnO2-conductive matrix nanocomposites, concentration-gradient structured layered Li-rich Mn-based oxides, porous LiNi0.5Mn1.5O4 nanorods, core-shell structured LiMnSiO4@C nanocomposites, spinel-type Co-Mn-O nanoparticles, and perovskite-type CaMnO3 with micro-nano structures all display superior electrochemical performance. This review should shed light on the sustainable development of advanced batteries and pseudocapacitors with nanostructured Mn-based oxides.

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“…Mg based anode materials are cost, safe, environmental friendly and offer high capacity however they are prone to a decrease in the charge and discharge cycling for energy consumption [2,3]. More recently, the use of graphene or graphene based composites as an alternative electrode material has gained greater acceptance due to its high mechanical strength to volume ratio, large surface area and excellent electrical conductivity [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Development of cathode materials for magnesium primary cell

Selvam¹

2016

IJRAE

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Enhancement of Discharge Capacity of Mg/MnO<SUB>2</SUB> Primary Cell with Nano-MnO<SUB>2</SUB> as Cathode

Cited by 9 publications

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Investigation of Sodium Phosphate and Sodium Dodecylbenzenesulfonate as Electrolyte Additives for AZ91 Magnesium-Air Battery

Investigation of Sodium Phosphate and Sodium Dodecylbenzenesulfonate as Electrolyte Additives for AZ91 Magnesium-Air Battery

Nanostructured Mn-based oxides for electrochemical energy storage and conversion

Development of cathode materials for magnesium primary cell

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