Issue 6, 2018

High-capacity and long-life lithium storage boosted by pseudocapacitance in three-dimensional MnO–Cu–CNT/graphene anodes

Abstract

Boosting the lifespan of MnO-based materials for future lithium ion batteries is one of the primary challenges due to the intrinsic low ionic conductivity and volume expansion during the conversion process. Herein, superior lithium storage in a new quaternary MnO–Cu–CNT/graphene composite has been demonstrated, which is boosted by pseudocapacitance benefitting from the three-dimensional CNT/graphene and nanosized Cu additives. Such architecture offers highly interpenetrated porous conductive networks in intimate contact with MnO–Cu grains and abundant stress buffer space for effective charge transport upon cycling. The ternary MnO–Cu–graphene electrode contributes an ever-increasing reversible capacity of 938.3 mA h g−1 after 800 cycles at 0.8 A g−1. In particular, the quaternary MnO–Cu–CNT/graphene electrode demonstrates a high specific capacity of 1334 mA h g−1 at 0.8 A g−1 after 800 cycles and long lifetimes of more than 3500 cycles at 5 A g−1 with a capacity of 557.9 mA h g−1 and close-to-100% Coulombic efficiency. The boosted pseudocapacitive lithium storage together with the simple material fabrication method in a MnO–Cu–CNT/graphene hybrid could pave the way for the development of high-capacity and long-life energy storage devices.

Graphical abstract: High-capacity and long-life lithium storage boosted by pseudocapacitance in three-dimensional MnO–Cu–CNT/graphene anodes

Supplementary files

Article information

Article type
Paper
Submitted
03 Nov 2017
Accepted
03 Jan 2018
First published
03 Jan 2018

Nanoscale, 2018,10, 2944-2954

High-capacity and long-life lithium storage boosted by pseudocapacitance in three-dimensional MnO–Cu–CNT/graphene anodes

J. Wang, Q. Deng, M. Li, K. Jiang, Z. Hu and J. Chu, Nanoscale, 2018, 10, 2944 DOI: 10.1039/C7NR08191J

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