Emergence of rechargeable seawater batteries

Senthilkumar, S.; Go, Wooseok; Han, Jinhyup; Thuy, Linh Pham Thi; Kishor, Koshal; Kim, Yong‐Il; Kim, Young‐Sik

doi:10.1039/c9ta08321a

Cited by 87 publications

(68 citation statements)

References 120 publications

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“…Sodium ion‐based electrochemical systems have been regarded as an alternative energy‐storage solution, by exploiting the naturally abundant sodium element and ions . In particular for large‐scale ESSs, rechargeable seawater batteries (SWBs) have garnered considerable attention owing to their unique scalability, low environmental impact, and sustainability (Figure a) . Seawater, employed as open cathode compartment of SWBs, is the most abundant and inexpensive natural resource without any capacity and lifetime limitations because sodium ions can be near‐infinitely supplied from the ocean.…”

Section: Figurementioning

confidence: 99%

Redox‐Active Functional Electrolyte for High‐Performance Seawater Batteries

et al. 2020

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DedicatedtoProfessor Reshef Tenne on the occasion of his 75th birthdayRechargeable seawater batteries have gained recognition as key sustainable electrochemical systems by employing the near-infinite and eco-friendly catholyte seawater.H owever, their practical applications have been limited owing to the low chemicala nd electrochemical stabilityo ft he anode component. Herein, as tability-secured approach was developed by using sodium-biphenyl-dimethoxyethane solution as ar edoxactive functional anolytef or high-performances eawater batteries. This anolyte system shows high electrochemical stability, superior cycle performance, and cost-effectiveness over conventional electrolyte systems. Figure 2. Voltage profiles of Na-BP-DME upondesodiation/sodiation processes in (a) Na-BP-DME electrode j Na metal cell and (b) SWB full cell at 0.5 mA cm À2 . Figure 4. Cycle performance of as eawater coin cellwith (a) Na-BP-DMEa nd (b) NaTf-TEGDME at acurrent density of 1mAcm À1 .Insitu DEMSd ata of (c) SUS mesh/Na-BP-DME/seawater and (d) SUS mesh/NaTf-TEGDME/seawater DEMSc ell. (e) 1 HNMR (400 MHz, CDCl 3 )s pectra of desodiated BP-DME.

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Section: Figurementioning

confidence: 99%

Redox‐Active Functional Electrolyte for High‐Performance Seawater Batteries

et al. 2020

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“…It is difficult to evaluate the influence of all the constituents on the catalytic reactions up to now 7,8 . Although a large number of Cl − can act as charge carriers to improve the conductivity of the electrolyte 9,10 , the resulting CER will compete with the OER [10][11][12] . Hence, materials with high selectivity for OER are desirable preferred at the anode in seawater electrolysis.…”

Section: Introductionmentioning

confidence: 99%

Challenges and Opportunities for Seawater Electrolysis: A Mini-Review on Advanced Materials in Chlorine-Involved Electrochemistry

Cui¹,

Shi²,

Li³

et al. 2021

Acta Physico Chimica Sinica

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Hydrogen (H2) is an important component in the framework of carbonneutral energy, and the scalable production of H2 from seawater electrolysis offers a feasible route to address global energy challenges. With abundant seawater reserves, seawater electrolysis, especially when powered by renewable electricity sources, has great prospects. However, chloride ions (Cl − ) in seawater can participate in the anodic reaction and accelerate the corrosion of electrode materials during electrolysis. Although the oxygen evolution reaction (OER) is thermodynamically favorable, the chlorine evolution reaction is highly competitive because fewer electrons are involved (2e − ). These two problems are compounded by the dearth of corrosion-resistant electrode materials, which hinders the practical applications of seawater electrolysis. Therefore, intensive research efforts have been devoted to optimizing electrode materials using fundamental theories for practical applications. This review summarizes the recent progress in advanced electrode materials with an emphasis on their selectivity and anti-corrosivity. Practical materials with improved selectivity for oxygen generation, such as mixed metal oxides, Ni/Fe/Co-based composites, and manganese oxide (MnOx)-coated heterostructures, are reviewed in detail. Theoretically, alkaline environments (pH > 7.5) are preferred for OER as a constant potential gap (480 mV) exists in the high pH region. Nevertheless, corrosion of both the cathode and anode from ubiquitous Clis inevitable. Only a few materials with good corrosion resistance are capable of sustained operation in seawater systems; these include metal titanium and carbon-based materials. The corrosion process is usually accompanied by the formation of a passivated layer on the surface, but the aggressive penetration of Clcan damage the whole electrode. Therefore, the selective inhibition of Cl − transport in the presence of a robust layer is critical to prevent continuous corrosion. Advances in anti-corrosion engineering, which encompasses inherently anti-corrosive materials, extrinsically protective coating, and in situ generated resistive species, are systematically discussed. Rational design can impart the material with good catalytic activity, stability, and corrosion resistance. Finally, we propose the following opportunities for future research: 1) screening of selective and anti-corrosive materials; 2) mechanism of competitive reactions and corrosion; 3) evaluation of anti-corrosive materials; 4) industrial-scale electrolysis with high current density; 5) optimization of experimental conditions; and 6) development of integrated electrolyzer devices. This review provides insights for the development of strategies aimed at tackling chlorine-related issues in seawater electrolysis.

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“…Secondly, protection techniques are necessary to maintain stable battery state by preventing overcharge and undercharge as in the LIB [22], [23]. For the SWB operation through ORR or OER reactions, it is necessary to suppress unnecessary reactions by using a kind of cutoff voltage [24], [25].…”

Section: Introductionmentioning

confidence: 99%

Seawater Battery-Based Wireless Marine Buoy System With Battery Degradation Prediction and Multiple Power Optimization Capabilities

Cho

Kim

et al. 2021

IEEE Access

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This paper presents a wireless marine buoy system based on the seawater battery (SWB), providing self-powered operation, power-efficient management, and degradation prediction and fault detection. Since conventional open circuit voltage (OCV) methods cannot be applied due to inherent cell characteristics of SWB, the coulomb counting (CC) method is adopted for the state of charge (SOC) monitoring. For the state of health (SOH), a variance-based detection scheme is proposed to provide degradation prediction and fault detection of the SWB. The self-powered operation is augmented by two proposed power optimization schemes such as multiple power management and three-step LED light control. A wireless buoy system prototype is manufactured, and its functional feasibility is experimentally verified, where its location and SOC are periodically monitored in a smartphone-based wireless platform.

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Emergence of rechargeable seawater batteries

Abstract: New concepts or chemistry is an urgent requirement for rechargeable batteries to achieve a low-cost, user-friendly nature with adequate energy densities and high levels of safety.

Cited by 87 publications

References 120 publications

Redox‐Active Functional Electrolyte for High‐Performance Seawater Batteries

Redox‐Active Functional Electrolyte for High‐Performance Seawater Batteries

Challenges and Opportunities for Seawater Electrolysis: A Mini-Review on Advanced Materials in Chlorine-Involved Electrochemistry

Seawater Battery-Based Wireless Marine Buoy System With Battery Degradation Prediction and Multiple Power Optimization Capabilities

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