α-Fe2O3 multi-shelled hollow microspheres for lithium ion battery anodes with superior capacity and charge retention

Xu, Simeng and Hessel, Colin M. and Ren, Hao and Yu, Ranbo and Jin, Quan and Yang, Mei and Zhao, Huijun and Wang, Dan (2014) α-Fe2O3 multi-shelled hollow microspheres for lithium ion battery anodes with superior capacity and charge retention. Energy and Environmental Science, 7 (2). pp. 632-637. ISSN 1754-5692

Abstract

Multi-shelled α-Fe2O3 hollow microspheres were synthesized using carbonaceous microsphere sacrificial templates and utilized for high capacity anode materials in lithium ion batteries (LIBs). Structural aspects including the shell thickness, number of internal multi-shells, and shell porosity were controlled by synthesis parameters to produce hollow microspheres with maximum lithium capacity and stable cycling behavior. Thin, porous, hollow microspheres with three concentric multi-shells showed the best cycling performance, demonstrating excellent stability and a reversible capacity of up to 1702 mA h g−1 at a current density of 50 mA g−1. The electrode performance is attributed to the large specific surface area and enhanced volumetric capacity of the multi-shelled hollow spheres that provide maximum lithium storage, while the porous thin shells facilitate rapid electrochemical kinetics and buffer mechanical stresses that accompany volume changes during de/lithiation.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 09 Oct 2017 05:20
Last Modified: 09 Oct 2017 05:20
Uncontrolled Keywords: cycling performance; electrochemical kinetics; electrode performance; large specific surface areas; lithium-ion battery anodes; reversible capacity; sacrificial templates; synthesis parameters; structural members and shapes; strength of building materials; mechanical properties; alkali metals; data storage, equipment and techniques
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030306 Synthesis of Materials
03 Chemical Sciences > 0306 Physical Chemistry (incl. Structural) > 030604 Electrochemistry
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1039/c3ee43319f
URI: http://eprints.usq.edu.au/id/eprint/31966

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