Recent Developments of Preintercalated Cathodes for Rechargeable Aqueous Zn‐Ion Batteries

Fan, Zixuan; He, Wei; Ni, Meng; Zhang, Peigeng; Tian, Wenbin; Zhang, Wei; Sun, ZhengMing

doi:10.1002/ente.202000829

Cited by 13 publications

(13 citation statements)

References 95 publications

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“…Up to now, many special morphologies are designed as cathode materials. Recently, Fan et al 33 proposed a view that a cathode with a high specific surface area and high porosity structure is beneficial to improve its electrochemical performance. The graphene-wrapped H 11 Al 2 V 6 O 23.2 nanobelt (HA-VOH@G) composites reported by Zhang et al 34 delivered a respectable rate performance.…”

Section: Introductionmentioning

confidence: 99%

Tremella-like Hydrated Vanadium Oxide Cathode with an Architectural Design Strategy toward Ultralong Lifespan Aqueous Zinc-Ion Batteries

Guan

Sun

et al. 2021

ACS Appl. Mater. Interfaces

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Rechargeable aqueous zinc-ion batteries (ZIBs) are promising systems for energy storage due to their operational safety, low cost, and environmental friendliness. However, the development of suitable cathode materials is plagued by the sluggish dynamics of Zn2+ with strong electrostatic interaction. Herein, an Al3+-doped tremella-like layered Al0.15V2O5·1.01H2O (A-VOH) cathode material with a large pore diameter and high specific surface area is demonstrated to greatly boost electrochemical performance as ZIB cathodes. Resultant ZIBs with a 3 M Zn(CF3SO3)2 electrolyte deliver a high specific discharge capacity of 510.5 mAh g–1 (0.05 A g–1), and an excellent energy storage performance is well maintained with a specific capacity of 144 mAh g–1 (10 A g–1) even after ultralong 10,000 cycles. The decent electrochemical performance roots in the novel tremella-like structure and the interlayer of Al3+ ions and water molecules, which could improve the electrochemical reaction kinetics and structural long cycle stability. Furthermore, the assembled coin-type cells could power a light-emitting diode (LED) lamp for 2 days. We believed that the design philosophy of unique morphology with abundant active sites for Zn2+ storage will boost the development of competitive cathodes for high-performance aqueous batteries.

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Section: Introductionmentioning

confidence: 99%

Tremella-like Hydrated Vanadium Oxide Cathode with an Architectural Design Strategy toward Ultralong Lifespan Aqueous Zinc-Ion Batteries

Guan

Sun

et al. 2021

ACS Appl. Mater. Interfaces

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confidence: 99%

“…Compared to ammonium ions, the monovalent alkaline metal cations could be introduced into the interlayer space to enhance ionic bonding, thus stabilizing the layered structure. 26 For example, Tian et al incorporated K + into hydrated vanadium pentoxide, leading to a new phase (KV 12 O 30−y • nH 2 O, KVOH) with a contracted interlayer spacing. 27 KVOH exhibits better cycling stability than VOH because the introduction of K−O bonds with more ionic character (82%) and higher binding energy enhances the interaction between layers and stabilizes the crystal structure.…”

mentioning

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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“…Based on Zn 2þ intercalation chemistry, vanadium-based oxides, including tunnel-type VO 2 , V 2 O 5 , V 2 O 3 , V 6 O 13, and pillared layered V x O y •nH 2 O, have widely been explored as efficient Zn-storage cathode materials with a high reversible capacity and rate capability. [12][13][14][15][16][17][18][19][20][21][22] Despite these advantages, it is rather difficult to achieve desirable energy density because of the low average discharge voltages (usually in the range of 0.6-0.8 V), which will be unsuitable for future practical applications. Therefore, it is of great significance to develop high-voltage cathodes as feasible alternatives.…”

Section: Introductionmentioning

confidence: 99%

Defect Engineering via Copper Doping on Oxygen‐Deficient Manganese Oxide for Durable Aqueous Zinc‐Ion Battery

Liang¹,

Sun

Qi³

et al. 2022

Energy Tech

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Aqueous Zn‐ion batteries (ZIBs) have triggered an astounding research surge because of their high safety, affordability, and impressive electrochemical properties. However, the smooth implementation of this promising technology is hindered by severe structural degradation and sluggish reaction kinetics of the cathode materials. Here, the defect engineering is demonstrated by the substitution doping of Cu2+ in layered δ‐MnO2 to boost the electrochemical reactivity for Zn‐ion storage. Benefited from the nanoscale morphology and oxygen‐deficient structural features, this Zn/MnO2 battery is able to deliver a high reversible capacity of 296.8 mAh g−1 with a capacity retention of 94.9% over 120 cycles (at 0.1 A g−1) and a desirable energy density of 441 Wh kg−1, as well as an ultra‐long cycle life up to 6000 cycles, which is also intensively associated with the facilitated Zn2+ diffusion and charge transfer rates after the Cu2+ dopants, based on the electrochemical kinetics analysis. The effortless but effective defect engineering arising from element doping can provide significant enlightenment to design high‐performance cathode materials for ZIBs.

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Recent Developments of Preintercalated Cathodes for Rechargeable Aqueous Zn‐Ion Batteries

Cited by 13 publications

References 95 publications

Tremella-like Hydrated Vanadium Oxide Cathode with an Architectural Design Strategy toward Ultralong Lifespan Aqueous Zinc-Ion Batteries

Tremella-like Hydrated Vanadium Oxide Cathode with an Architectural Design Strategy toward Ultralong Lifespan Aqueous Zinc-Ion Batteries

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

Defect Engineering via Copper Doping on Oxygen‐Deficient Manganese Oxide for Durable Aqueous Zinc‐Ion Battery

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