Carbon-Free TiO2 Microspheres as Anode Materials for Sodium Ion Batteries

Title
Carbon-Free TiO2 Microspheres as Anode Materials for Sodium Ion Batteries
Authors
김형철정훈기김지수윤빈나정민기황장연Hoang-Long Du선양국
Issue Date
2019-02
Publisher
ACS energy letters
Citation
VOL 4, NO 2-501
Abstract
In this study, we synthesize a carbon-free anatase/bronze TiO2 microsphere (TiO2(A/B)-MS) via the solvothermal method and demonstrate its potential for use as a high-performance anode material for sodium-ion batteries. The highly compact structure of the microsphere constructed from nanoprimary particles not only enhances the structural stability and subsequently leads to good cycling performance but also enables the transport pathways for Na+ ions and electrons to be shortened, ensuring fast Na-storage performance. In addition, an anatase/bronze interfacial structure of the material further improves fast Na+-ion diffusion kinetics. Benefiting from these merits, the proposed TiO2(A/B)-MS demonstrates a high specific capacity of 221 mAh g– 1 at 0.1 C, fast charge– discharge capability up to 50 C, and long-term cycling stability over 1000 cycles at 1 and 10 C without using a conductive carbon matrix. A combination of various experiments and theoretical studies is used to verify the outstanding Na-storage performance of TiO2(A/B)-MS.
URI
http://pubs.kist.re.kr/handle/201004/70289
ISSN
2380-8195
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE