Emerging Opportunities and Future Directions

Pech‐Canul, M. A.; Rodríguez, Socorro Valdez; González, L.; Ravindra, Nuggehalli M.

doi:10.1007/978-3-030-02171-9_10

Cited by 7 publications

(6 citation statements)

References 23 publications

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“…The physically plausible oxidation states of vanadium in its binary oxides, e.g., VO, V 2 O 3 , VO 2 , and V 2 O 5 , vary from V 2+ to V 5+ . , Although the V 5+ state is not observed electrochemically in Na x VP 3 , it can be accessed in mixed transition metal NaSICON phosphates, such as Na x VMn(PO 4 ) 3 , Na x VCr(PO 4 ) 3 , and Na x NbTi(PO 4 ) 3 , ,− indicating the possibility of its accessibility in mixed polyanion NaSICONs as well. Figure maps the physically accessible regions of Na concentrations and the corresponding V oxidation states at varying contents of PO 4 3– , SiO 4 4– , and SO 4 2– groups ( x -axis) in the V-based NaSICON framework.…”

Section: Rational Design Of High-energy Density Nasicon Electrodesmentioning

confidence: 99%

Rational Design of Mixed Polyanion Electrodes Na_xV₂P_3–i(Si/S)_iO₁₂ for Sodium Batteries

et al. 2022

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Polyanion-based electrode materials are important for rechargeable sodium(Na)-ion batteries owing to their structural stability and their high redox voltage. The redox voltages and gravimetric capacities of polyanion electrodes can be tuned by the choice of transition metal and/or polyanion groups. In this work we explore the effect of changing polyanion groups on the redox voltages and the gravimetric capacities of polyanion electrodes. Using first-principles calculations, we examine the influence of polyanionic substitutions on the stability and electrochemical behavior of the Na3V2(PO4)3 electrode material, which adopts the prototype structure of the natrium superionic conductor (NaSICON). Starting from the Na3V2(PO4)3 structure, we explore the partial or total substitution of PO4 3– groups by SiO4 4– or SO4 2– moieties, unveiling the uncharted multicomponent Na–V–P–(Si/S)–O phase diagram. We show that small amounts of SiO4 4– can activate the VV/IV redox couple, which is not experimentally accessible in the PO4 3– NaSICON analogue, thereby increasing the average Na intercalation voltage. In the case of SO4 2– substitution, we observe an increase in voltage of each V redox couple (i.e., VIII/II, VIV/III, and VV/IV) but at the expense of the maximum amount of Na+ intercalated. We show that exploiting the varying inductive effects of different polyanion groups can be effective for tuning the energy density of NaSICON electrode materials.

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Section: Rational Design Of High-energy Density Nasicon Electrodesmentioning

confidence: 99%

Rational Design of Mixed Polyanion Electrodes Na_xV₂P_3–i(Si/S)_iO₁₂ for Sodium Batteries

et al. 2022

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“…energy density (Wh kg −1 ) vs power density (W kg −1 ), is a chart used to compare the performance of various energy storage devices. Hence, it is needless to say that the improvement of energy density, without sacrificing the power output and cyclic stability, remains a crucial turning point in realizing the potential of ECs as primary power sources [6,7]. Generally, ECs comprise of electrode materials, negative and positive electrodes, electrolyte and separators.…”

Section: Introductionmentioning

confidence: 99%

NiCo₂O₄@V₂O₅ nanobelts as electrode materials for efficient electrochemical charge storage

Mohapatra

Sahoo²,

Praharaj³

et al. 2022

Nano Futures

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Development of novel nanostructured composites is of current interest for application as electrode materials. In this regard, an attempt has been made to synthesize NiCo2O4@V2O5 nanocomposite and compare its charge storage performance with pristine NiCo2O4 nanoparticles. HR-SEM micrographs reveal a mesoporous nanobelt like morphology of the nanocomposite with a BET surface area of ~65 m2 g-1 and average mesopore size centered on ~7.55 nm. Electrochemical measurements performed on both samples anticipate capacitive behavior with quasi-reversible redox reactions. However, NiCo2O4@V2O5 is found to demonstrate strikingly high specific capacity of 194 mAh g-1 (1742 F g-1) at 1 A g-1 along with a notable capacity retention of ~90 % even after 3000 charge –discharge cycles and Coulombic efficiency >97 % at 5 A g-1. These features are much superior to the properties of pristine NiCo2O4 nanoparticles. The results obtained in this work ascertain functional robustness of NiCo2O4@V2O5 nanocomposites as electrode materials in supercapacitors.

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“…Most TMDCs are known to possess a direct band gap in their monolayer form that differs from their bulk counterparts and possess an indirect band gap. 38 This acts as the main constraint for those applications where a high surface area is an indispensable factor. ReS 2 , owing to its direct band gap of 1.55 eV even in bulk form unlike other TMDCs, makes it a preeminent candidate for such applications.…”

Section: Introductionmentioning

confidence: 99%

A light-fostered supercapacitor performance of multi-layered ReS₂ grown on conducting substrates

2021

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Emerging Opportunities and Future Directions

Cited by 7 publications

References 23 publications

Rational Design of Mixed Polyanion Electrodes Na_xV₂P_3–i(Si/S)_iO₁₂ for Sodium Batteries

Rational Design of Mixed Polyanion Electrodes Na_xV₂P_3–i(Si/S)_iO₁₂ for Sodium Batteries

NiCo₂O₄@V₂O₅ nanobelts as electrode materials for efficient electrochemical charge storage

A light-fostered supercapacitor performance of multi-layered ReS₂ grown on conducting substrates

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Emerging Opportunities and Future Directions

Cited by 7 publications

References 23 publications

Rational Design of Mixed Polyanion Electrodes NaxV2P3–i(Si/S)iO12 for Sodium Batteries

Rational Design of Mixed Polyanion Electrodes NaxV2P3–i(Si/S)iO12 for Sodium Batteries

NiCo2O4@V2O5 nanobelts as electrode materials for efficient electrochemical charge storage

A light-fostered supercapacitor performance of multi-layered ReS2 grown on conducting substrates

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Rational Design of Mixed Polyanion Electrodes Na_xV₂P_3–i(Si/S)_iO₁₂ for Sodium Batteries

Rational Design of Mixed Polyanion Electrodes Na_xV₂P_3–i(Si/S)_iO₁₂ for Sodium Batteries

NiCo₂O₄@V₂O₅ nanobelts as electrode materials for efficient electrochemical charge storage

A light-fostered supercapacitor performance of multi-layered ReS₂ grown on conducting substrates