Opportunities in Na/K [hexacyanoferrate] frameworks for sustainable non-aqueous Na<sup>+</sup>/K<sup>+</sup> batteries

Tyagi, Ashwani; Nagmani, .; Puravankara, Sreeraj

doi:10.1039/d1se01653a

Cited by 9 publications

(3 citation statements)

References 196 publications

(276 reference statements)

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“…Fortunately, several excellent performing cathode materials have been reported, such as layered oxides, 1,2 phosphates, 3 sulfates 4 , and Prussian blue analogs. 5 However, the demand and optimization of anode materials remain a significant challenge for commercialization. 6 Alloybased anodes suffer from massive volume expansion during metal ion insertion, leading to fast capacity decay.…”

Section: Introductionmentioning

confidence: 99%

Role of Cyclopentyl methyl ether co-solvent in Improving SEI layer stability in Hard Carbon Anode for Sodium-ion Batteries

Nagmani

Das

Puravankara

2023

Preprint

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The conversion of polyethylene terephthalate (PET) municipal waste via the carbonization process into hard carbon (WPET-HC) delivers a high-performing, low-cost, sustainable anode material for sodium-ion batteries (SIBs). To further optimize the anode, electrolytes and interfacial chemistry are critical in improving cycling stability and rate capability. Herein, cyclopentyl methyl ether (CPME), a weakly solvating and a wide temperature solvent, is used as an alternative co-solvent to ethylene carbonate (EC) to deliver a high initial coulombic efficiency (ICE) up to 75%. The larger interlayer spacing, low surface area, and slit-shaped micro and mesoporous presence in the WPET-HC structure enhance the low potential plateau capacity to 68%, showing a more battery-type anode material from plastic trash. The WPET-HC delivered the excellent reversible capacity of 356 mAh g-1 at the current density of 30 mA g-1 with superior cycling of 91% after 100 cycles using CPME-PC-based electrolyte. The reduction of CPME co-solvent forms a more inorganic SEI than EC-generated SEI, providing a stable and thin SEI layer boosting the ICE and cycling stability of the anode. The low-temperature battery metric for CPME-PC-based electrolytes showed ~30% added capacity and improved ICE value compared to EC-PC-based electrolytes. The CPME-PC-based electrolyte maintained the higher capacity retention of 88% and 74% at 10℃ and 0℃, respectively, with a coulombic efficiency of 100%, revealing the excellent stability of the electrolyte with the HC anode. The work provides an eco-friendly approach to developing hard carbons from plastic trash and reports for the first time the use of greener, low-solvating CPME in improving the reversible capacity and ICE for low-temperature applications of SIBs.

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Section: Introductionmentioning

confidence: 99%

Role of Cyclopentyl methyl ether co-solvent in Improving SEI layer stability in Hard Carbon Anode for Sodium-ion Batteries

Nagmani

Das

Puravankara

2023

Preprint

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“…HCs derived from biomass precursors such as rice husks, lotus stalks, peanut shells, corn straws, potato, mushrooms, orange peel, argan shells, and others , have been explored as high energy density anode materials for SIBs and PIBs. Generally, due to its unique properties of high surface area, versatile porosity provides high capacity and excellent cyclability. , …”

Section: Introductionmentioning

confidence: 99%

“…Generally, due to its unique properties of high surface area, versatile porosity provides high capacity and excellent cyclability. 20,21 The existence of micropores and mesopores in the HC significantly improves the electronic properties, provides more active sites for the adsorption−desorption of electrolyte ions, and allows diffusion of electrolyte ions into the pores of the HC at a higher current density. 22 However, the majority of micropores in the structure lead to a high surface area, more surface adsorption-based capacity, poor initial Coulombic efficiency (iCE), and low capacity retention because of the inapt and blocked microporous structure of the micropore.…”

Section: ■ Introductionmentioning

confidence: 99%

Jute-Fiber Precursor-Derived Low-Cost Sustainable Hard Carbon with Varying Micro/Mesoporosity and Distinct Storage Mechanisms for Sodium-Ion and Potassium-Ion Batteries

Verma,

Puravankara

2022

Langmuir

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Hard carbon (HC) remains the most viable choice as a negative electrode for sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) owing to its higher energy density (discharge up to zero volts), higher capacity (distinct storage mechanisms), and cycling stability. Herein, a biomass jute fiber precursor HC anode (JPC) with varying porosity is reported for the first time as a low-cost and sustainable high-performance HC anode for SIBs and PIBs. Direct carbonization results in micromeso porous HC (JPC-D), and micro-wave pretreated jute fiber results in ultramicroporous HC (JPC-M). The mesoporosity generated in JPC-D during synthesis outperforms the ultramicroporous JPC-M with a high reversible capacity of 328 mAh g −1 (iCE = 66%) at a current density of 30 mA g −1 (0.1C) with superior capacity retention of 84% after 100 cycles in SIBs. The Na + ion and K + ion storage in HCs, especially at lower voltages, shows distinct storage mechanisms that depend on the morphology and porosity of the material. JPC-D contributed 39% of its total capacity through the plateau region capacity (PRC), suggesting more pore filling from hierarchical porosity in SIBs. JPC-D and JPC-M exhibit more insertion-based capacity than pore-filling processes in PIBs. The presence of inorganic impurities (Ca, Si, Al, and Fe) encapsulated in the carbon structure plays a critical role in developing mesopores. The yield (%) of HC from direct carbonization per kilogram of jute is ∼34%, which makes it cheaper than HC from sugar-based precursors and 1.5 times more affordable than other biomass-derived HC. The jute-based micro-mesoporous HC is a novel, cost-effective, sustainable approach to designing HC for a PRC-based battery-type anode in SIBs and PIBs.

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Effect of pore morphology on the enhanced potassium storage in hard carbon derived from polyvinyl chloride for K-ion batteries

Nagmani

Tyagi

Verma

et al. 2023

Electrochimica Acta

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Opportunities in Na/K [hexacyanoferrate] frameworks for sustainable non-aqueous Na⁺/K⁺ batteries

Abstract: In the past decade, the most sought cathode materials for SIBs and PIBs include transition metal oxides (TMOs), polyanionic phosphates and fluoro phosphates, NASICON-type polyanionic compounds, and alkali metal hexacyanoferrates...

Cited by 9 publications

References 196 publications

Role of Cyclopentyl methyl ether co-solvent in Improving SEI layer stability in Hard Carbon Anode for Sodium-ion Batteries

Role of Cyclopentyl methyl ether co-solvent in Improving SEI layer stability in Hard Carbon Anode for Sodium-ion Batteries

Jute-Fiber Precursor-Derived Low-Cost Sustainable Hard Carbon with Varying Micro/Mesoporosity and Distinct Storage Mechanisms for Sodium-Ion and Potassium-Ion Batteries

Effect of pore morphology on the enhanced potassium storage in hard carbon derived from polyvinyl chloride for K-ion batteries

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Opportunities in Na/K [hexacyanoferrate] frameworks for sustainable non-aqueous Na+/K+ batteries

Abstract: In the past decade, the most sought cathode materials for SIBs and PIBs include transition metal oxides (TMOs), polyanionic phosphates and fluoro phosphates, NASICON-type polyanionic compounds, and alkali metal hexacyanoferrates...

Cited by 9 publications

References 196 publications

Role of Cyclopentyl methyl ether co-solvent in Improving SEI layer stability in Hard Carbon Anode for Sodium-ion Batteries

Role of Cyclopentyl methyl ether co-solvent in Improving SEI layer stability in Hard Carbon Anode for Sodium-ion Batteries

Jute-Fiber Precursor-Derived Low-Cost Sustainable Hard Carbon with Varying Micro/Mesoporosity and Distinct Storage Mechanisms for Sodium-Ion and Potassium-Ion Batteries

Effect of pore morphology on the enhanced potassium storage in hard carbon derived from polyvinyl chloride for K-ion batteries

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Opportunities in Na/K [hexacyanoferrate] frameworks for sustainable non-aqueous Na⁺/K⁺ batteries