Issue 2, 2021

Cu2Nb34O87 nanowires as a superior lithium storage host in advanced rechargeable batteries

Abstract

In this study, for the first time, Cu2Nb34O78 nanowires were fabricated via an electrospinning technique and exhibited outstanding electrochemical performance as an anode material. The nanowires presented a charge capacity of 279.8 mA h g−1 with remarkable long-life stability for 300 cycles (0.037% capacity loss per cycle). Significantly, ex situ X-ray diffraction, ex situ high-resolution transmission electron microscopy, and ex situ X-ray photoelectron spectroscopy were performed to unveil the reaction process and change in the microstructure during charge/discharge cycles in detail. The observed evidence demonstrates that the remarkable Li-storage capability is due to the enhanced contact-specific area and reduced transport path of Cu2Nb34O78 nanowires. In addition, the host mechanism is unraveled, in which the contribution of the reversible capacity is discussed based on the Nb5+/Nb4+, Nb4+/Nb3+ and Cu2+/Cu+ redox couples.

Graphical abstract: Cu2Nb34O87 nanowires as a superior lithium storage host in advanced rechargeable batteries

Article information

Article type
Research Article
Submitted
04 9 2020
Accepted
13 11 2020
First published
13 11 2020

Inorg. Chem. Front., 2021,8, 444-451

Cu2Nb34O87 nanowires as a superior lithium storage host in advanced rechargeable batteries

X. Cai, H. Yan, R. Zheng, H. Yu, Z. Yang, X. Zhang, M. Xia, W. Chen, Y. Cui and J. Shu, Inorg. Chem. Front., 2021, 8, 444 DOI: 10.1039/D0QI01075H

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