Controlled Hydrothermal Growth and Li Storage Performance of 1D VO Nanobelts with Variable Vanadium Valence.

Author(s) Jiang, Y.; Zhou, X.; Chen, X.; Wen, J.; Guan, L.; Shi, M.; Ren, Y.; Liu, Z.
Journal Nanomaterials (Basel)
Date Published 2019 Apr 17
Abstract

One-dimensional (1D) vanadium oxide nanobelts (VO NBs) with variable V valence, which include VO·HO NBs, VO (B) NBs and VO NBs, were prepared by a simple hydrothermal treatment under a controllable reductive environment and a following calcination process. Electrochemical measurements showed that all these VO NBs can be adopted as promising cathode active materials for lithium ion batteries (LIBs). The Li storage mechanism, charge transfer property at the solid/electrolyte interface and Li diffusion characteristics for these as-synthesized 1D VO NBs were systematically analyzed and compared with each other. The results indicated that VO NBs could deliver a relatively higher specific discharge capacity (213.3 mAh/g after 50 cycles at 100 mA/g) and median discharge voltage (~2.68-2.71 V vs. Li/Li) during their working potential range when compared to other VO NBs. This is mainly due to the high V valence state and good crystallinity of VO NBs, which are beneficial to the large Li insertion capacity and long-term cyclic stability. In addition, the as-prepared VO (B) NBs had only one predominant discharge plateau at the working potential window so that it can easily output a stable voltage and power in practical LIB applications. This work can provide useful references for the selection and easy synthesis of nanoscaled 1D vanadium-based cathode materials.

DOI 10.3390/nano9040624
ISSN 2079-4991
Citation Jiang Y, Zhou X, Chen X, Wen J, Guan L, Shi M, et al. Controlled Hydrothermal Growth and Li Storage Performance of 1D VO Nanobelts with Variable Vanadium Valence. Nanomaterials (Basel). 2019;9(4).