Cu3(OH)2V2O7·2H2O@rGO with bimetallic redox activity as a novel cathode material for calcium–ion batteries

Tan, Xingnian; Wang, Junjun; Jin, Shuhan; Wang, Yu; Fan, Qiao; Zhang, Lei; An, Qinyou

doi:10.1039/d3nj00886j

Cited by 5 publications

(1 citation statement)

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“…[5,[16][17][18] Some significant progress has been made, such as achieving reversible plating/stripping of Ca-metal anodes at room temperature [6,19] Figure 1. Vanadium oxide cathode materials in CIBs [32][33][34][35][38][39][40][41][42][43][44][45][46][47][48] and reported strategies to improve the calcium storage performance of vanadium oxide, including preinsertion chemistry, electrolyte solvation structure, and electrode structure optimization. The reported cathode data were analyzed in terms of current densities and cycle numbers.…”

Section: Introductionmentioning

confidence: 99%

Freestanding Ammonium Vanadate Composite Cathodes with Lattice Self‐Regulation and Ion Exchange for Long‐Lasting Ca‐Ion Batteries

Wang,

Zhang,

Qiao

et al. 2024

Advanced Materials

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Calcium‐ion batteries (CIBs) have emerged as a promising alternative for electrochemical energy storage. The lack of high‐performance cathode materials severely limits the development of CIBs. Vanadium oxides are particularly attractive as cathode materials for CIBs, and pre‐insertion chemistry is often used to improve their calcium storage performance. However, the room temperature cycling lifespan of vanadium oxides in organic electrolytes still falls short of 1,000 cycles. Here, based on pre‐insertion chemistry, we further improved the cycling life of vanadium oxides by integrated electrode and electrolyte engineering. Utilizing a tailored Ca electrolyte, the constructed freestanding (NH4)2V6O16·1.35H2O@graphene oxide@carbon nanotubes (NHVO‐H@GO@CNT) composite cathode achieves a 305 mAh g−1 high capacity and 10,000 cycles record‐long life. Additionally, for the first time, a Ca‐ion hybrid capacitor full cell is assembled and delivers a capacity of 62.8 mAh g−1. The calcium storage mechanism of NHVO‐H@GO@CNT based on a two‐phase reaction and the exchange of NH4+ and Ca2+ during cycling are revealed. The lattice self‐regulation of V‐O layers is observed and the layered vanadium oxides with Ca2+ pillars formed by ion exchange exhibits higher capacity. This work provides novel strategies to enhance the calcium storage performance of vanadium oxides via integrated structural design of electrodes and electrolytes modification.This article is protected by copyright. All rights reserved

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Section: Introductionmentioning

confidence: 99%

Freestanding Ammonium Vanadate Composite Cathodes with Lattice Self‐Regulation and Ion Exchange for Long‐Lasting Ca‐Ion Batteries

Wang,

Zhang,

Qiao

et al. 2024

Advanced Materials

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Promising VO₂(B)/rGO Heterojunction Cathode for Building High‐Capacity and Long‐Lifespan Ca‐Ion Batteries

Wang,

Zhang

et al. 2024

Adv Funct Materials

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Calciumion batteries (CIBs) are an appealing energy storage technology owing to the low redox potential of Ca2+/Ca and the abundant Ca reserves in the earth's crust. However, suitable cathode materials with high capacity and long lifespan are scarce. Herein, VO2(B)/reduced graphene oxide (rGO) heterojunction formed by interfacial V─O─C bonds is constructed and first reported as a cathode material for CIBs, which exhibits an ultrahigh discharge capacity of 319.2 mAh g−1 and exceptional long lifespan (3000 cycles at 500 mA g−1 with capacity retention of 85%). In addition, VO2(B)/rGO heterojunction also shows an outstanding rate capability at 50 °C (127.1 mAh g−1 at 1000 mA g−1). The remarkable electrochemical performance is attributed to the big tunnel structures of VO2(B) and the role of rGO in enhancing electronic conductivity. Density functional theory calculations reveal a feasible Ca2+ diffusion path at the interface. Furthermore, a reversible single‐phase insertion/extraction reaction is revealed by in situ X‐ray diffraction, ex situ Raman, and ex situ X‐ray photoelectron spectroscopy. This work demonstrates that VO2(B)/rGO holds great potential for building high‐capacity and long‐lifespan CIBs.

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Cathode materials for calcium‐ion batteries: Current status and prospects

Wu,

Zhao,

Hao

et al. 2023

Carbon Neutralization

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In the post‐lithium‐ion battery era, calcium‐ion batteries (CIBs) have aroused extensive attention because of their strong cost competitiveness, low standard redox potentials, and high safety. However, the related research is progressing slowly due to the constraints of the development of electrode materials. The large ionic radius of Ca2+ especially increases the challenge to design cathode materials for reversible Ca2+ uptake/removal. Despite the inspiring achievements, various challenges still need to be further resolved. Here, this review systematically summarizes the recent advances in CIB cathode materials, including Prussian blue and its analogues, metal oxides, metal chalcogenides, polyanionic compounds, and organic materials. We first provide a brief introduction to CIBs and compare their advantages with other battery technologies. Then, preparation methods are introduced, and breakthrough investigations are highlighted. Finally, some possible research directions are discussed to promote the development of this emerging battery technology.

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Cu₃(OH)₂V₂O₇·2H₂O@rGO with bimetallic redox activity as a novel cathode material for calcium–ion batteries

Abstract: Owing to the abundance of calcium, low redox potential and high safety, calcium-ion batteries (CIBs) have been considered a promising candidate for post lithium-ion batteries. However, the lack of high-performance...

Cited by 5 publications

References 43 publications

Freestanding Ammonium Vanadate Composite Cathodes with Lattice Self‐Regulation and Ion Exchange for Long‐Lasting Ca‐Ion Batteries

Freestanding Ammonium Vanadate Composite Cathodes with Lattice Self‐Regulation and Ion Exchange for Long‐Lasting Ca‐Ion Batteries

Promising VO₂(B)/rGO Heterojunction Cathode for Building High‐Capacity and Long‐Lifespan Ca‐Ion Batteries

Cathode materials for calcium‐ion batteries: Current status and prospects

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Cu3(OH)2V2O7·2H2O@rGO with bimetallic redox activity as a novel cathode material for calcium–ion batteries

Abstract: Owing to the abundance of calcium, low redox potential and high safety, calcium-ion batteries (CIBs) have been considered a promising candidate for post lithium-ion batteries. However, the lack of high-performance...

Cited by 5 publications

References 43 publications

Freestanding Ammonium Vanadate Composite Cathodes with Lattice Self‐Regulation and Ion Exchange for Long‐Lasting Ca‐Ion Batteries

Freestanding Ammonium Vanadate Composite Cathodes with Lattice Self‐Regulation and Ion Exchange for Long‐Lasting Ca‐Ion Batteries

Promising VO2(B)/rGO Heterojunction Cathode for Building High‐Capacity and Long‐Lifespan Ca‐Ion Batteries

Cathode materials for calcium‐ion batteries: Current status and prospects

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Product

Resources

About

Cu₃(OH)₂V₂O₇·2H₂O@rGO with bimetallic redox activity as a novel cathode material for calcium–ion batteries

Promising VO₂(B)/rGO Heterojunction Cathode for Building High‐Capacity and Long‐Lifespan Ca‐Ion Batteries