Issue 8, 2021

A flexible and conductive connection introduced by cross-linked CNTs between submicron Si@C particles for better performance LIB anode

Abstract

To improve the inevitable capacity fading issues faced by traditional submicron Si@C electrodes used as anode materials in LIBs, a flexible and conductive connection design is proposed and realized by a solid-state growth approach. In this construction, Si@C is entangled into in situ synthesized carbon nanotube-based network to form a highly connective Si@C/CNTs composite. The interwoven carbon-nanotubes having tight linkages with Si@C contribute to ensure the charge transfer pathway within Si@C particles and accommodate the volume expansion during cycling. The Co/N co-doping further facilitates the transportation of Li ions. As expected, the Si@C/CNT electrode shows improved conductivity and long-term cyclic stability with a high-capacity retention ratio of 80.7% after 500 cycles at 0.5 A gāˆ’1. In this study, the flexible and conductive connection design realized by the in situ synthesis of CNTs can provide some reference to the improvement of alloy-type anode materials and not just Si-based anode materials for LIBs.

Graphical abstract: A flexible and conductive connection introduced by cross-linked CNTs between submicron Si@C particles for better performance LIB anode

Supplementary files

Article information

Article type
Paper
Submitted
05 Jan 2021
Accepted
16 Feb 2021
First published
19 Feb 2021
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2021,3, 2287-2294

A flexible and conductive connection introduced by cross-linked CNTs between submicron Si@C particles for better performance LIB anode

Q. Zhou, J. Liu, X. Gong and Z. Wang, Nanoscale Adv., 2021, 3, 2287 DOI: 10.1039/D1NA00012H

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