Controlling Vanadate Nanofiber Interlayer via Intercalation with Conducting Polymers: Cathode Material Design for Rechargeable Aqueous Zinc Ion Batteries

Kim, Jichang; Lee, Se Hun; Park, Changyong; Kim, Hyung Seok; Park, Jae Ho; Chung, Kyung Yoon; Ahn, Heejoon

doi:10.1002/adfm.202100005

Cited by 67 publications

(24 citation statements)

References 67 publications

(74 reference statements)

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“…The TG curves of NVO and KNVO could be divided into three ranges (Figure d). The first stage (I) is the loss of physically adsorbed water, the second stage (II) is the loss of crystal water and ammonium ions, and the third range (III) is the complete loss of ammonium ions and the process of crystallization . The total weight loss of KNVO and NVO is 5.58 and 7.65%, respectively.…”

Section: Results and Discussionmentioning

confidence: 99%

Potassium Ammonium Vanadate with Rich Oxygen Vacancies for Fast and Highly Stable Zn-Ion Storage

et al. 2022

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Vanadium-based materials have been extensively studied as promising cathode materials for zinc-ion batteries because of their multiple valences and adjustable ion-diffusion channels. However, the sluggish kinetics of Zn-ion intercalation and less stable layered structure remain bottlenecks that limit their further development. The present work introduces potassium ions to partially substitute ammonium ions in ammonium vanadate, leading to a subtle shrinkage of lattice distance and the increased oxygen vacancies. The resulting potassium ammonium vanadate exhibits a high discharge capacity (464 mAh g–1 at 0.1 A g–1) and excellent cycling stability (90% retention over 3000 cycles at 5 A g–1). The excellent electrochemical properties and battery performances are attributed to the rich oxygen vacancies. The introduction of K+ to partially replace NH4 + appears to alleviate the irreversible deammoniation to prevent structural collapse during ion insertion/extraction. Density functional theory calculations show that potassium ammonium vanadate has a modulated electron structure and a better zinc-ion diffusion path with a lower migration barrier.

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Section: Results and Discussionmentioning

confidence: 99%

Potassium Ammonium Vanadate with Rich Oxygen Vacancies for Fast and Highly Stable Zn-Ion Storage

et al. 2022

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“…The thermal decomposition rates reach their maximum values at 73 °C, 339 °C, and 386 °C, respectfully. The first weight loss of ≈8.3% from 34 to 207 °C for purified product corresponded to the evaporation of weakly adsorbed structural water [ 22 ]. The second weight loss of ≈4.9% from 207 to 360 °C was attributed to the decomposition of (NH 4 ) 2 V 6 O 16 ·1.5H 2 O and the third weight loss of ≈3.4% from 360 to 408 °C corresponded to the deintercalation of strongly bound H 2 O via Equation (3) [ 18 , 23 ].…”

Section: Resultsmentioning

confidence: 99%

A Sustainable Technique to Prepare High-Purity Vanadium Pentoxide via Purification with Low Ammonium Consumption

et al. 2022

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The general preparation method for V2O5 is ammonium salt vanadium precipitation, which inevitably produces large amounts of ammonia nitrogen wastewater. In this paper, we propose an environmentally friendly method for preparing high-purity V2O5 with low ammonium consumption. The purity of the V2O5 product reaches more than 99% while reducing the level of ammonium consumption. The vanadium precipitation efficiency reaches 99.23% and the V2O5 purity of the product reaches 99.05% under the following conditions: precipitation time of 1.5 h, precipitation temperature of 98 °C, initial precipitation pH of 2, ammonium addition coefficient of 2, purification time of 5 min with purification performed twice, purification temperature of 65 °C. In this study, compared with the use of ammonia spirit for vanadium precipitation and ammonium salt vanadium precipitation, the ammonia consumption levels are reduced by 79.80% and 80.00%, and the purity levels are increased by 0.70% and 1.01%, respectively. The compositions of the precipitated (NaV3O8∙xH2O) and purified ((NH4)2V6O16·1.5H2O) hydrolysis products are characterized via XRD. The TGA results show that NaV3O8∙xH2O contains 1.5 times the amount of crystal water. The FTIR results explain that the two V3O8− layers are combined end-to-end to form a V6O162− layer. The change of the product image indicates that the purification process includes three stages. Firstly, heating and NH4+ attack expand the V3O8− layer. NH4+ diffuses more easily into the V3O8− layer. Secondly, NH4+ destroys the electrostatic interaction between Na+ with the V3O8− layer and replacing Na+. Finally, V3O8− is polymerized into V6O162− to keep the crystal structure stable.

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“…In general, the semicircular arc is attributed to the charge transfer resistance (R ct ) and the linear tail usually defined as ion diffusion. [27] The equivalent circuit diagram of Mn(VO 3 ) 2 and the fitting R ct value of the 1st, 50th, and 100th cycles are provided in Figure S4 and Table S3. At the beginning, the irreversible Zn 2 + insertion/desertion leads to high R ct (31.52 Ω).…”

Section: Chemistry-a European Journalmentioning

confidence: 99%

Improved Reversible Zinc Storage Achieved in a Constitutionally Crystalline‐Stable Mn(VO₃)₂ Nanobelts Cathode

Zhang

et al. 2022

Chemistry A European J

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Rechargeable zinc-ion batteries (ZIBs) are potential for grid-scale applications owing to their safety, low price, and available sources. The development of ZIBs cathode with high specific capacity, wide operating voltage window and stable cyclability is urgently needed in next-generation commercial batteries. Herein, we report a structurally crystalline-stable Mn(VO 3 ) 2 nanobelts cathode for ZIBs prepared via a facile hydrothermal method. The as-synthesized Mn(VO 3 ) 2 exhibited high specific capacity of 350 mAh g À 1 at 0.1 A g À 1 , and maintained a capacity retention of 92 % after 10,000 cycles at 2 A g À 1 . It also showed good rate performance and obtained a reversible capacity of up to 200 mAh g À 1 after 600 cycles at 0.2 A g À 1 under À 20 °C. The electrochemical tests suggest that Mn(VO 3 ) 2 nanobelts impart fast Zn 2 + ions migration, and the introduction of manganese atoms help make the structures more indestructible, leading to a good rate performance and prolonged cycle lifespan.

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Controlling Vanadate Nanofiber Interlayer via Intercalation with Conducting Polymers: Cathode Material Design for Rechargeable Aqueous Zinc Ion Batteries

Cited by 67 publications

References 67 publications

Potassium Ammonium Vanadate with Rich Oxygen Vacancies for Fast and Highly Stable Zn-Ion Storage

Potassium Ammonium Vanadate with Rich Oxygen Vacancies for Fast and Highly Stable Zn-Ion Storage

A Sustainable Technique to Prepare High-Purity Vanadium Pentoxide via Purification with Low Ammonium Consumption

Improved Reversible Zinc Storage Achieved in a Constitutionally Crystalline‐Stable Mn(VO₃)₂ Nanobelts Cathode

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Controlling Vanadate Nanofiber Interlayer via Intercalation with Conducting Polymers: Cathode Material Design for Rechargeable Aqueous Zinc Ion Batteries

Cited by 67 publications

References 67 publications

Potassium Ammonium Vanadate with Rich Oxygen Vacancies for Fast and Highly Stable Zn-Ion Storage

Potassium Ammonium Vanadate with Rich Oxygen Vacancies for Fast and Highly Stable Zn-Ion Storage

A Sustainable Technique to Prepare High-Purity Vanadium Pentoxide via Purification with Low Ammonium Consumption

Improved Reversible Zinc Storage Achieved in a Constitutionally Crystalline‐Stable Mn(VO3)2 Nanobelts Cathode

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Improved Reversible Zinc Storage Achieved in a Constitutionally Crystalline‐Stable Mn(VO₃)₂ Nanobelts Cathode