Defect engineering on V2O3 cathode for long-cycling aqueous zinc metal batteries.
Kefu Zhu,Shiqiang Wei,Hongwei Shou,Fei-Ran Shen,Shuangming Chen,Pengjun Zhang,Changda Wang,Yuyang Cao,Xin Guo,Mi Luo,Hongjun Zhang,Bangjiao Ye,Xiaojun Wu,Lunhua He,Li Song +14 more
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TL;DR: In this paper, a vanadium-defective V2O3 cathode was employed as cathode active material in an aqueous Zn coin cell configuration, achieving capacity retention of about 81% after 30,000 cycles at 5'A'g−1.
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Abstract: Defect engineering is a strategy that is attracting widespread attention for the possibility of modifying battery active materials in order to improve the cycling stability of the electrodes. However, accurate investigation and quantification of the effect of the defects on the electrochemical energy storage performance of the cell are not trivial tasks. Herein, we report the quantification of vanadium-defective clusters (i.e., up to 5.7%) in the V2O3 lattice via neutron and X-ray powder diffraction measurements, positron annihilation lifetime spectroscopy, and synchrotron-based X-ray analysis. When the vanadium-defective V2O3 is employed as cathode active material in an aqueous Zn coin cell configuration, capacity retention of about 81% after 30,000 cycles at 5 A g−1 is achieved. Density functional theory calculations indicate that the vanadium-defective clusters can provide favorable sites for reversible Zn-ion storage. Moreover, the vanadium-defective clusters allow the storage of Zn ions in V2O3, which reduces the electrostatic interaction between the host material and the multivalent ions. Aqueous Zn metal batteries are a promising system for high-power electrochemical energy storage. Here, the authors investigate a defective V2O3 cathode via neutron and X-ray techniques and test the material in Zn metal cell configuration for 30k cycles.
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Citations
Vanadium Oxide: Phase Diagrams, Structures, Synthesis, and Applications
TL;DR: In this article , the most recent progress in synthesis methods and applications of some thermodynamically stable and metastable vanadium oxides, including but not limited to V2O3, V3O5, VO2, V 3O7, V 2O4, V4O9, V5O13, V6O13 and V6V2, are discussed.
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Advances on Defect Engineering of Vanadium‐Based Compounds for High‐Energy Aqueous Zinc–Ion Batteries
TL;DR: In this paper , the authors highlight the challenges of different vanadium-based cathode materials (e.g., vanadium oxides and vanadates) and summarizes the advances in defect engineering strategies including types and effects of the defects, designed strategies, and characterization techniques for high-energy ZIBs.
144
An Air-Rechargeable Zn/Organic Battery with Proton Storage.
TL;DR: In this paper , an air-rechargeable Zn battery with H+-based chemistry was developed in a mild ZnSO4 electrolyte for the first time, where benzo[i]benzo[6,7]quinoxalino[2,3-a]benzos[ 6,7]-quinox alino[ 2,3c]phenazine-5,8,13,16,21,24-hexaone (BQPH) was employed as cathode material.
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Co-intercalation of Dual Charge Carriers in Metal-ion-confining Layered Vanadium Oxide Nanobelts for Aqueous Zinc-Ion Batteries.
Tingting Lv,Guoyin Zhu,Shengju Dong,Qingquan Kong,Yi-Hsuan Peng,Shu-Ling Jiang,Guangxun Zhang,Zilin Yang,Shengyang Yang,Xiaochen Dong,Huan Pang,Yizhou Zhang +11 more
TL;DR: In this article , a series of nanomaterials based on metal-confined nanobelts was obtained, and the effect of interlayer spacing on the electrochemical performance was analyzed.
119
Ion migration and defect effect of electrode materials in multivalent-ion batteries
TL;DR: In this paper , the authors highlighted the fundamental scientific understanding of defect chemistry and its relationship with multivalent-ion migration in electrode materials of rechargeable multivalent ion batteries (MVIBs) in terms of cost, volumetric energy density and safety.
106
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