Issue 19, 2021

Shear-structured MoNb6O18 as a new anode for lithium-ion batteries

Abstract

Owing to their high theoretical capacities, safe operational voltage, unique tunnel-shaped structural features for fast lithium ion transfer, and structural stability, niobium-based oxides are regarded as promising candidate anode materials for lithium-ion batteries (LIBs). Here, molybdenum niobium oxide (MoNb6O18) with a high theoretical capacity of 399 mA h g−1 (Mo6+/Mo4+ and Nb5+/Nb3+) was developed as a new anode material for LIBs. The crystal structure of MoNb6O18 was observed to display a Wadsley–Roth phase of the ReO3 shear structure. The discharge capacity of micron-sized particles of MoNb6O18 was measured to be 219.4 mA h g−1 with a high initial Coulombic efficiency of 96.8% at 0.2C and 154.3 mA h g−1 at 1C from 1.0 to 3.0 V. The results of ex situ X-ray diffraction (XRD) experiments revealed the ability of MoNb6O18 to serve as an intercalation-type anode material for lithium ion storage with outstanding structural stability. Also, an LiMn2O4//MoNb6O18 full cell displayed desirable lithium-ion storage properties.

Graphical abstract: Shear-structured MoNb6O18 as a new anode for lithium-ion batteries

Supplementary files

Article information

Article type
Communication
Submitted
08 Jul 2021
Accepted
03 Sep 2021
First published
03 Sep 2021
This article is Open Access
Creative Commons BY license

Mater. Adv., 2021,2, 6272-6277

Shear-structured MoNb6O18 as a new anode for lithium-ion batteries

J. Cheng, F. Lu and X. Kuang, Mater. Adv., 2021, 2, 6272 DOI: 10.1039/D1MA00590A

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