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Title: VOPO4⋅2H2O nanosheet cathode for enhanced sodium storage
Authors: Zhang, Xianghua
Yang, Dan
Liu, Weiling
Feng, Yuezhan
Rui, Xianhong
Yu, Yan
Keywords: Engineering::Materials
Issue Date: 2020
Source: Zhang, X., Yang, D., Liu, W., Feng, Y., Rui, X., & Yu, Y. (2020). VOPO4⋅2H2O nanosheet cathode for enhanced sodium storage. Frontiers in Energy Research, 8, 200-. doi:10.3389/fenrg.2020.00200
Journal: Frontiers in Energy Research
Abstract: Na-ion batteries (SIBs) are anticipated to capture a broad development space in the field of large-scale energy storage due to the abundant sodium resources. High-performance cathode materials are very critical. VOPO4⋅2H2O with a two-dimensional (2D) layered structure is a very promising candidate for SIBs because of its high working voltage and theoretical specific capacity. Herein, a simple one-step reflux method is designed to fabricate a cathode of VOPO4⋅2H2O nanosheets. It exhibits a high average operating potential of ∼3.5 V, remarkable specific capacity (e.g., 135 mAh g–1 at 0.05 C), favorable high current charge-discharge ability (e.g., 58 mAh g–1 even at 20 C) as well as extralong cyclability (e.g., 0.026% capacity fading rate for per cycle at 20 C during 1000 cycles). The kinetic analysis implies that the superior sodium storage performance is mainly benefiting from the advantages of unique nanosheet structure, accelerating the rapid Na-ion diffusion.
ISSN: 2296-598X
DOI: 10.3389/fenrg.2020.00200
Rights: © 2020 Zhang, Yang, Liu, Feng, Rui and Yu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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