Electrochemical behavior of LiV3O8 positive electrode in hybrid Li,Na–ion batteries

Maletti, Sebastian; Sarapulova, Angelina; Tsirlin, Alexander A.; Oswald, Steffen; Fauth, François; Giebeler, Lars; Bramnik, Natalia N.; Ehrenberg, Helmut; Mikhailova, Daria

doi:10.1016/j.jpowsour.2017.10.086

Cited by 16 publications

(5 citation statements)

References 41 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The XRD pattern (Figure 1c) of the as-prepared LiV 6)°] space groups, respectively, as was indexed by the related Bragg positions. 27 No other crystalline phases were observed. These results clearly provide the successful formation of LiV 3 O 8 nanoparticles via a simple sol−gel method.…”

Section: ■ Results and Discussionmentioning

confidence: 94%

“…The XRD pattern (Figure c) of the as-prepared LiV 3 O 8 reveals a two-phase mixture containing about 90% LiV 3 O 8 and 10% Li 0.3 V 2 O 5 . The reflection positions of LiV 3 O 8 and Li 0.3 V 2 O 5 correspond to P 2 1 / m [ a = 6.6588(3) Å, b = 3.5943(1) Å, c = 11.9800(4) Å, β = 107.860(2)°] and A 2/ m [ a = 10.0385(6) Å, b = 3.5999(1) Å, c = 15.4088(9) Å, β = 110.529(6)°] space groups, respectively, as was indexed by the related Bragg positions . No other crystalline phases were observed.…”

Section: Resultsmentioning

confidence: 99%

“…The discharge/charge profiles exhibit the characteristic two main reduction plateaus around 2.31 V (referred to the octet sulfur ring opening and the reduction to soluble higher-order polysulfides) and 2.05 V (related to the conversion of higher-order polysulfides to short-chain polysulfides and further insoluble Li 2 S 2 /Li 2 S). − The discharge voltage profile corresponding to the cell with LiV 3 O 8 –HS also displays two extra reduction plateaus around 2.83 and 2.58 V, which are associated with the intercalation of the Li + ions into LiV 3 O 8 (Figure S3). On the other hand, all cells exhibit two separate oxidation plateaus around 2.25 and 2.37 V during the charging process, referring to the reversible conversion reactions of short-chain polysulfides to higher-order polysulfides and further to sulfur. The discharge curve of the LiV 3 O 8 –HS reveals a higher discharge capacity (1254 mAh g –1 ) in comparison with that of V 2 O 5 –HS (1162 mAh g –1 ) and especially with that of PP-S (921 mAh g –1 ), indicating that the vanadium oxide-modified separators possess better redox ability and higher active material utilization than the uncoated commercial separator.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

LiV₃O₈-Based Functional Separator Coating as Effective Polysulfide Mediator for Lithium–Sulfur Batteries

Maletti

Podetti

Oswald

et al. 2020

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

The commercial development of high-energy lithium−sulfur (Li−S) batteries is still hampered by the irreversible active material loss and fast capacity decay triggered by the dissolution of polysulfide species and the subsequent polysulfide shuttle effect. Carbon-coated separators can limit the diffusion of polar polysulfide intermediates between electrodes. However, the capacity fading still exists owing to the weak interaction of nonpolar carbons. Herein, a novel lithium vanadium(V) oxide-coated hybrid separator (LiV 3 O 8 − HS) is designed for enhancing the performance of Li−S batteries. The results show that the LiV 3 O 8 coating acts as a shield-like redox mediator to physically block the diffusion of polysulfide intermediates and chemically promotes the conversion of soluble higher-order polysulfides to insoluble short-chain polysulfides via internal disproportionation reactions, accelerating the redox reaction kinetics and lessening the active material loss during cycling. As a consequence, Li−S cells with the LiV 3 O 8 −HS demonstrated superior electrochemical performance despite using a pure sulfur cathode, with a high initial discharge capacity of 1254 mAh g −1 at 0.2 C and superior long-term cyclability with a low average capacity decline of 0.063% per cycle after 500 cycles at 0.5 C. The coating of the commercial separator, which can be straightforwardly adopted in an industrial process, offers a simple and powerful route for boosting the performance of Li−S batteries toward commercial application.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

LiV₃O₈-Based Functional Separator Coating as Effective Polysulfide Mediator for Lithium–Sulfur Batteries

Maletti

Podetti

Oswald

et al. 2020

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In recent years, increasing efforts have been devoted to the development of hybrid Li/Na-ion systems, motivated mainly by the higher abundance and lower cost of Na [31,32]. Such systems may be based on polycationic electrode materials or on Li-based (Na-based) electrodes or electrolyte in Na-based (Li-based) electrochemical systems [33].…”

Section: Introductionmentioning

confidence: 99%

Laboratory X-ray Microscopy Study of Microcrack Evolution in a Novel Sodium Iron Titanate-Based Cathode Material for Li-Ion Batteries

et al. 2021

Self Cite

View full text Add to dashboard Cite

The long-term performance of batteries depends strongly on the 3D morphology of electrode materials. Morphological changes, i.e., particle fracture and surface deterioration, are among the most prominent sources of electrode degradation. A profound understanding of the fracture mechanics of electrode materials in micro- and nanoscale dimensions requires the use of advanced in situ and operando techniques. In this paper, we demonstrate the capabilities of laboratory X-ray microscopy and nano X-ray computed tomography (nano-XCT) for the non-destructive study of the electrode material’s 3D morphology and defects, such as microcracks, at sub-micron resolution. We investigate the morphology of Na0.9Fe0.45Ti1.55O4 sodium iron titanate (NFTO) cathode material in Li-ion batteries using laboratory-based in situ and operando X-ray microscopy. The impact of the morphology on the degradation of battery materials, particularly the size- and density-dependence of the fracture behavior of the particles, is revealed based on a semi-quantitative analysis of the formation and propagation of microcracks in particles. Finally, we discuss design concepts of the operando cells for the study of electrochemical processes.

show abstract

“…Lithium‐ion batteries (LIBs) have been utilized in power electric vehicles, hybrid electric vehicles, and millions of electronic devices. However, they still suffer from low Li‐storage capacities . To this end, numerous cathode materials have been explored, including LiCoO 2 ,, LiMnO 2 , LiNiO 2 ,, LiFePO 4 ,, and Li 3 V 2 (PO 4 ) 3 .…”

Section: Introductionmentioning

confidence: 99%

Stabilization of LiV₃O₈ Rod‐like Structure by Protective Mg₃(PO₄)₂Layer for Advanced Lithium Storage Cathodes

Xie

Zhu

et al. 2018

Energy Tech

View full text Add to dashboard Cite

LiV3O8 material with high discharge capacity has attracted increasing attention as cathode material for lithium‐ion batteries (LIBs). However, LiV3O8 is still limited by its weak dissolution and change of lattice structure. In this study, Mg3(PO4)2 fully coated LiV3O8 nanoparticles are successfully prepared by rheological phase reaction and surface deposition. The thickness of Mg3(PO4)2 coating layer is estimated to 24.7 nm for surface‐modified LiV3O8 with Mg3(PO4)2 content of 1.0 wt.%. The as‐prepared Mg3(PO4)2 coated‐LiV3O8 is utilized as cathode and showed high initial capacity of 323.93 mAh g−1. In addition, it maintained stable capacity of 250.82 mAh g−1 after 50 cycles at the current rate of 60 mA g−1 between 1.8 and 4.0 V. This value was much higher than that of bare LiV3O8. Besides, even at current density of 240 mA g−1, its capacity keeps 170.89 mAh g−1 after 50 cycles. The detailed quantitative kinetics analyses confirm the fundamental reasons behind the enhanced rate capability and cycling stability. Overall, this work opens up novel avenues towards the design of protecting cathode materials, which could broaden applications of insoluble phosphates.

show abstract

Electrochemical behavior of LiV3O8 positive electrode in hybrid Li,Na–ion batteries

Cited by 16 publications

References 41 publications

LiV₃O₈-Based Functional Separator Coating as Effective Polysulfide Mediator for Lithium–Sulfur Batteries

LiV₃O₈-Based Functional Separator Coating as Effective Polysulfide Mediator for Lithium–Sulfur Batteries

Laboratory X-ray Microscopy Study of Microcrack Evolution in a Novel Sodium Iron Titanate-Based Cathode Material for Li-Ion Batteries

Stabilization of LiV₃O₈ Rod‐like Structure by Protective Mg₃(PO₄)₂Layer for Advanced Lithium Storage Cathodes

Contact Info

Product

Resources

About

Electrochemical behavior of LiV3O8 positive electrode in hybrid Li,Na–ion batteries

Cited by 16 publications

References 41 publications

LiV3O8-Based Functional Separator Coating as Effective Polysulfide Mediator for Lithium–Sulfur Batteries

LiV3O8-Based Functional Separator Coating as Effective Polysulfide Mediator for Lithium–Sulfur Batteries

Laboratory X-ray Microscopy Study of Microcrack Evolution in a Novel Sodium Iron Titanate-Based Cathode Material for Li-Ion Batteries

Stabilization of LiV3O8 Rod‐like Structure by Protective Mg3(PO4)2Layer for Advanced Lithium Storage Cathodes

Contact Info

Product

Resources

About

LiV₃O₈-Based Functional Separator Coating as Effective Polysulfide Mediator for Lithium–Sulfur Batteries

LiV₃O₈-Based Functional Separator Coating as Effective Polysulfide Mediator for Lithium–Sulfur Batteries

Stabilization of LiV₃O₈ Rod‐like Structure by Protective Mg₃(PO₄)₂Layer for Advanced Lithium Storage Cathodes