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Instruments / Technical Area	Publication Details	Published	Actions
B07-C-Versatile Soft X-ray beamline: Ambient Pressure XPS and NEXAFS E01-JEM ARM 200CF	Multi‐scale investigations of δ‐Ni 0.25 V 2 O 5 ·nH 2 O cathode materials in aqueous zinc‐ion batteries Jianwei Li , Kit Mccoll , Xuekun Lu , Sanjay Sathasivam , Haobo Dong , Liqun Kang , Zhuangnan Li , Siyu Zhao , Andreas G. Kafizas , Ryan Wang , Dan J. L. Brett , Paul R. Shearing , Furio Corà , Guanjie He , Claire J. Carmalt , Ivan P. Parkin Advanced Energy Materials 8 DOI: 10.1002/aenm.202000058 Diamond Proposal Number(s): [24197, 22572] Show Abstract ▼ Abstract: Cost‐effective and environment‐friendly aqueous zinc‐ion batteries (AZIBs) 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 optimized. 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, a new class of hydrated porous δ‐Ni0.25V2O5.nH2O nanoribbons for use as an AZIB cathode is reported. 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 favorable Zn2+ diffusion properties, arising from the atomic‐level structure of the well‐defined lattice channels. Furthermore, the microstructure of the as‐prepared 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 modeling, illustrating favorable porosity and satisfactory tortuosity.	Feb 2020

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B07-C-Versatile Soft X-ray beamline: Ambient Pressure XPS and NEXAFS
E01-JEM ARM 200CF

Multi‐scale investigations of δ‐Ni 0.25 V 2 O 5 ·nH 2 O cathode materials in aqueous zinc‐ion batteries