Issue 16, 2018

A hierarchical carbon modified nano-NiS2 cathode with high thermal stability for a high energy thermal battery

Abstract

Nanocrystallization is widely used to improve the discharge performances of LIBs. While its lower thermal stability limits the operating time, especially for the thermal battery system, which discharges at high temperatures (usually 500–550 °C). In this paper, NiS2 particles were coated with amorphous carbon. Then they accumulated into submicron particles and were connected/fixed by a carbon network. The initial decomposition temperature of nano-NiS2 increased from 400 °C to 590 °C after this hierarchical carbon modification. The hierarchical carbon modified nano-NiS2 cathode revealed excellent discharge performances in thermal batteries at high temperatures. Specifically with 0.1 A cm−2 at 500 °C, the specific capacity and energy reach 610 mA h g−1 and 1082 W h kg−1, respectively, at a cut-off voltage of 1.4 V. The specific energy retains about 503 W h kg−1 even at 700 °C. The multiple protective effects of hierarchical carbon modification not only effectively improve the conductivity and thermal stability, but also inhibit the dissolution and shuttling of products. So, hierarchical carbon modification makes nano-NiS2 more suitable for high specific energy and long operating life thermal batteries.

Graphical abstract: A hierarchical carbon modified nano-NiS2 cathode with high thermal stability for a high energy thermal battery

Supplementary files

Article information

Article type
Paper
Submitted
11 Jan 2018
Accepted
20 Mar 2018
First published
21 Mar 2018

J. Mater. Chem. A, 2018,6, 7123-7132

A hierarchical carbon modified nano-NiS2 cathode with high thermal stability for a high energy thermal battery

C. Jin, L. Fu, J. Zhu, W. Yang, D. Li and L. Zhou, J. Mater. Chem. A, 2018, 6, 7123 DOI: 10.1039/C8TA00346G

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