Issue 17, 2021

Design of a niobium tungsten oxide/C micro-structured electrode for fast charging lithium-ion batteries

Abstract

Maximum energy storage in minimum charging time is increasingly important to evaluate the performance of lithium ion batteries (LIBs). High rate electrode materials require high ion and electron transport ability. Niobium tungsten oxides as emerging materials are employed as anodes for LIBs and show desirable rate performance owing to their high Li+ diffusion coefficients. However, most studies focus on the preparation and performance of niobium tungsten oxides at the nanoscale while electrode materials in micro grade result in high tap density and smaller electrode thickness with a shorter electron pathway under the same mass loading. Herein, Nb18W16O93/C spheres in micro grade with a carbon layer coating on Nb18W16O93 nanograins are synthesized via a facile solvothermal method. Owing to the enhanced electronic conductivity and protection of structural integrity by the carbon layer, the Nb18W16O93/C anode exhibits excellent rate performance with 182.8 mA h gāˆ’1 at a high rate of 5C with a capacity retention of 81% (based on 225.7 mA h gāˆ’1 at 0.2C). In addition, superior cycling stability is shown with a capacity retention of 85.6% at 1C after 100 cycles and 68% at 5C after 300 cycles. This stable anode material with advanced rate capability shows huge competitiveness as a candidate for fast charging materials of LIBs.

Graphical abstract: Design of a niobium tungsten oxide/C micro-structured electrode for fast charging lithium-ion batteries

Supplementary files

Article information

Article type
Research Article
Submitted
07 May 2021
Accepted
09 Jul 2021
First published
10 Jul 2021

Inorg. Chem. Front., 2021,8, 3998-4005

Design of a niobium tungsten oxide/C micro-structured electrode for fast charging lithium-ion batteries

W. Liu, M. Xu and M. Zhu, Inorg. Chem. Front., 2021, 8, 3998 DOI: 10.1039/D1QI00587A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements