Multi‐Scale Investigations of δ‐Ni0.25V2O5·nH2O Cathode Materials in Aqueous Zinc‐Ion Batteries
Jianwei Li,Kit McColl,Xuekun Lu,Sanjayan Sathasivam,Haobo Dong,Liqun Kang,Zhuangnan Li,Siyu Zhao,Andreas Kafizas,Ryan Wang,Dan J. L. Brett,Paul R. Shearing,Furio Corà,Guanjie He,Guanjie He,Claire J. Carmalt,Ivan P. Parkin +16 more
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TLDR
In this paper, a new class of hydrated porous δ-Ni0.nH2O nanoribbons for use as an AZIB cathode is presented, and the host vanadate lattice has favorable Zn2+ diffusion properties, arising from the atomic-level structure of the well-defined lattice channels.Abstract:
Cost-effective and environmentally friendly aqueous zinc-ion batteries (AZIB) exhibit tremendous potential for application in grid-scale energy storage systems but are limited by suitable cathode materials. Hydrated vanadium bronzes have gained significant attention for AZIBs and can be produced with a range of different pre-intercalated ions, allowing their properties to be optimised. However, gaining a detailed understanding of the energy storage mechanisms within these cathode materials remains a great challenge due to their complex crystallographic frameworks, limiting rational design from the perspective of enhanced Zn2+ diffusion over multiple length scales. Herein, we report on a new class of hydrated porous δ-Ni0.25V2O5.nH2O nanoribbons for use as an AZIB cathode. The cathode delivers reversibility showing 402 mAh g-1 at 0.2 A g-1 and a capacity retention of 98 % over 1200 cycles at 5 A g-1. A detailed investigation using experimental and computational approaches reveal that the host ‘δ’ vanadate lattice has favourable Zn2+ diffusion properties, arising from the atomic-level structure of the well-defined lattice channels. Furthermore, the microstructure of the asprepared cathodes is examined using multi-length scale X-ray computed tomography for the first time in AZIBs and the effective diffusion coefficient is obtained by image-based modelling, illustrating favourable porosity and satisfactory tortuosity.read more
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Active Materials for Aqueous Zinc Ion Batteries: Synthesis, Crystal Structure, Morphology, and Electrochemistry
TL;DR: The current advances, existing limitations, along with the possible solutions in the pursuit of cathode materials with high voltage, fast kinetics, and long cycling stability are comprehensively covered and evaluated to guide the future design of aqueous ZIBs with a combination of high gravimetric energy density, good reversibility, and a long cycle life.
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Recent Advances in Vanadium-Based Aqueous Rechargeable Zinc-Ion Batteries
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Manganese and Vanadium Oxide Cathodes for Aqueous Rechargeable Zinc-ion Batteries: A Focused View on Performance, Mechanism and Developments
Vinod Mathew,Balaji Sambandam,Seokhun Kim,Sungjin Kim,Sohyun Park,Seulgi Lee,Muhammad Hilmy Alfaruqi,Vaiyapuri Soundhararajan,Saiful Islam,Dimas Yunianto Putro,Jang Yeon Hwang,Yang-Kook Sun,Jaekook Kim +12 more
TL;DR: The development of new battery technologies requires to be well established in the same era of lithium ion batteries (LIBs), a well commercialized technology, and the merits should surpass over other technologies as discussed by the authors.
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Comprehensive understanding of the roles of water molecules in aqueous Zn-ion batteries: from electrolytes to electrode materials
TL;DR: In this article, the role of water molecules in rechargeable aqueous Zn-ion batteries (AZIBs) has been discussed from the perspective of the electrolyte, Zn anode, and cathode materials.
References
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TL;DR: Batteries, fuel cells and supercapacitors belong to the same family of energy conversion devices and are needed to service the wide energy requirements of various devices and systems.
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A high-capacity and long-life aqueous rechargeable zinc battery using a metal oxide intercalation cathode
TL;DR: In this article, a vanadium oxide bronze was used as the positive electrode for a Zn cell with reversible intercalation of Zn ions in a layered Zn0.25V2O5⋅nH2O-based positive electrode.
Journal ArticleDOI
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TL;DR: This work demonstrates that an aqueous electrolyte based on Zn and lithium salts at high concentrations is a very effective way to address irreversibility issues and brings unprecedented flexibility and reversibility to Zn batteries.