Capacitive deionization: Processes, materials and state of the technology

Ahmed, Ashique; Tewari, Sanjay

doi:10.1016/j.jelechem.2018.02.024

Cited by 158 publications

(71 citation statements)

References 99 publications

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“…New desalination technologies with high ion removal capacity and low energy consumption are urgently needed to solve the worldwide water scarcity problem, and capacitive deionization (CDI) is now regarded as a competitive electrochemical means of saving energy and delivering clean water, i.e., water desalination using energy storage electrode materials with the benefit of energy recovery [193][194][195][196][197][198]. Faradaic cation insertion electrodes (e.g., NTP, NMO) have been widely used in electrochemical energy storage and more recently have been explored for selective electrochemical deionization applications due to the higher inherent ion selectivity and lower energy/material intensity arising from their specific crystalline structures and well-defined redox potentials [21,193,[199][200][201][202][203][204].…”

Section: Aqueous Batteries With Desalinationmentioning

confidence: 99%

NASICON-Structured NaTi2(PO4)3 for Sustainable Energy Storage

et al. 2019

Nano-Micro Lett.

119

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HIGHLIGHTS • For the first time, we fully presented the recent progress of the application of NaTi 2 (PO 4) 3 on sodium-ion batteries including nonaqueous batteries, aqueous batteries, aqueous batteries with desalination, and sodium-ion hybrid capacitors. • The unique NASICON structure of NaTi 2 (PO 4) 3 and the various strategies on improving the performance of NaTi 2 (PO 4) 3 electrode have been presented and summarized in detail. ABSTRACT Several emerging energy storage technologies and systems have been demonstrated that feature low cost, high rate capability, and durability for potential use in large-scale grid and high-power applications. Owing to its outstanding ion conductivity, ultrafast Na-ion insertion kinetics, excellent structural stability, and large theoretical capacity, the sodium superionic conductor (NASICON)-structured insertion material NaTi 2 (PO 4) 3 (NTP) has attracted considerable attention as the optimal electrode material for sodium-ion batteries (SIBs) and Na-ion hybrid capacitors (NHCs). On the basis of recent studies, NaTi 2 (PO 4) 3 has raised the rate capabilities, cycling stability, and mass loading of rechargeable SIBs and NHCs to commercially acceptable levels. In this comprehensive review, starting with the structures and electrochemical properties of NTP, we present recent progress in the application of NTP to SIBs, including non-aqueous batteries, aqueous batteries, aqueous batteries with desalination, and sodium-ion hybrid capacitors. After a thorough discussion of the unique NASICON structure of NTP, various strategies for improving the performance of NTP electrode have been presented and summarized in detail. Further, the major challenges and perspectives regarding the prospects for the use of NTP-based electrodes in energy storage systems have also been summarized to offer a guideline for further improving the performance of NTP-based electrodes.

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Section: Aqueous Batteries With Desalinationmentioning

confidence: 99%

NASICON-Structured NaTi2(PO4)3 for Sustainable Energy Storage

et al. 2019

Nano-Micro Lett.

119

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“…This situation has encouraged the development of the water desalination technologies, and particularly of those addressed to cost-effectiveness and energy-efficiency. Among them, the capacitive deionization (CDI) is one of the most attractive for its simplicity and eco-friendliness, and it has recently received great attention [189][190][191].…”

Section: Capacitive Deionization Of Watermentioning

confidence: 99%

“…The capacitance of the porous electrode material and, hence, its desalination performance depends on many parameters, including its specific surface area and hydrophilicity, the size and distribution of its pores, as well as its ionic conduction properties [189,[191][192][193][194][195]. Based on the electrosorption mechanism and kinetics, porous carbons with good electrical conductivity, hierarchical pore distribution, and high specific surface area are commonly regarded as the optimal materials for the achievement of high CDI performance.…”

Section: Capacitive Deionization Of Watermentioning

confidence: 99%

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Electrospun Nanomaterials for Energy Applications: Recent Advances

Santangelo

2019

Applied Sciences

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Electrospinning is a simple, versatile, cost-effective, and scalable technique for the growth of highly porous nanofibers. These nanostructures, featured by high aspect ratio, may exhibit a large variety of different sizes, morphologies, composition, and physicochemical properties. By proper post-spinning heat treatment(s), self-standing fibrous mats can also be produced. Large surface area and high porosity make electrospun nanomaterials (both fibers and three-dimensional fiber networks) particularly suitable to numerous energy-related applications. Relevant results and recent advances achieved by their use in rechargeable lithium- and sodium-ion batteries, redox flow batteries, metal-air batteries, supercapacitors, reactors for water desalination via capacitive deionization and for hydrogen production by water splitting, as well as nanogenerators for energy harvesting, and textiles for energy saving will be presented and the future prospects for the large-scale application of electrospun nanomaterials will be discussed.

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“…Removing ionic compounds dissolved in water is an important step in the process of water treatment. With the flourishing development of carbon materials and supercapacitors in recent years, a new tool called capacitive deionization (CDI) is emerging as a competitive technology that consumes less energy and is easy to maintain compared with reverse osmosis, multi-stage flash distillation and multi-effect distillation [1][2][3][4]. Capacitance deionization devices are based on the principles of supercapacitors, which use carbon materials with a highly specific surface area to coat the electrode plate.…”

Section: Introductionmentioning

confidence: 99%

Corncob waste activated with different pore formers for capacitive deionization (CDI) materials

Lang¹,

Hu²,

Zhao³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tAs a new desalination technology, capacitive deionization (CDI) has made continuous progress in recent years. This paper explores possible resource utilization channels for corncob waste to prepare capacitive deionized plate materials. Using corncob waste as a matrix, porous materials were prepared by high-temperature insulation from oxygen. The specific surface area of the resulting carbon material was 1,267.9 m 2 g -1 , and a capacitance of 145.5 F g -1 was achieved in a three-electrode system; the desorption capacity was 16.9 mg g, close to the performance of high-performance materials such as graphene. CDI uses low-cost and waste recycling materials. In the present study, different effects of K 2 FeO 4 and KOH as pore formers on the micro-morphology and chemical structure of the material were compared. The corncob-based carbon materials obtained from K 2 FeO 4 and KOH met the basic requirements of the capacitive deionized plate material, whereas K 2 FeO 4 increased the degree of graphitization of corncob carbon materials; the corncob-based bio char produced from the K 2 FeO 4 pores helped to shorten the time of one adsorption cycle, but the cost is slightly higher than that of the KOH hole. Under different requirements, K 2 FeO 4 and KOH are promising as pore-forming agents for corncob CDI electrodes. The cycling performance verified that the carbon materials prepared in the previous process performed well during the desorption process and recycling process, which can meet the needs of repeated use, and corncob waste is a promising resource for capacitive deionization plate materials.

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Capacitive deionization: Processes, materials and state of the technology

Cited by 158 publications

References 99 publications

NASICON-Structured NaTi2(PO4)3 for Sustainable Energy Storage

NASICON-Structured NaTi2(PO4)3 for Sustainable Energy Storage

Electrospun Nanomaterials for Energy Applications: Recent Advances

Corncob waste activated with different pore formers for capacitive deionization (CDI) materials

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