Mn3O4 encapsulated in hollow carbon spheres coated by graphene layer for enhanced magnetization and lithium-ion batteries performance

Elisa Thauer, Xiaoze Shi, Shuai Zhang, Xuecheng Chen, Lukas Deeg, Rüdiger Klingeler, Karolina Wenelska and Ewa Mijowska

Energy, 2021, vol. 217, issue C

Abstract: We report a facile method to prepare graphene coated core-shell Mn3O4 nanoparticles encapsulated in hollow carbon sphere (HCS) (G–HCS–Mn3O4). HCSs were firstly prepared at high temperature based on a core-shell template, leading to good electrical conductivity of 21.6 S m−1. The porous shells of HCSs provide passage for the manganese precursors and big cavities to store the inorganic particles. Furthermore, the Mn3O4 filling is proven by magnetization measurements showing characteristic ferrimagnetic ordering at 41 K. Electrochemical studies show that the Mn3O4 nanoparticles encapsulated in HCS are electrochemical active and there is full access to the theoretical capacity of Mn3O4. When used as anode material, G–HCS–Mn3O4 impresses by superior properties compared to pristine HCS. It can achieve a high specific charge capacity of 557 mAh g−1 at the current density of 100 mA g−1 and even 374 at 500 mA g−1. The approach of exploiting HCS-based nanocomposites can be expanded to encapsulate a variety of inorganic materials with controllable size and amount, providing new choices for electrode materials and other potential applications.

Keywords: Hollow carbon spheres; Manganese oxide; Encapsulating method; Anode material; Lithium-ion batteries (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544220325068
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:217:y:2021:i:c:s0360544220325068

DOI: 10.1016/j.energy.2020.119399

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().