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A single layer of Fe3O4@TiO2 submicron spheres as a high-performance electrode for lithium-ion microbatteries

Title
A single layer of Fe3O4@TiO2 submicron spheres as a high-performance electrode for lithium-ion microbatteries
Author
선양국
Keywords
THIN-FILM ELECTRODES; SOL-GEL METHOD; HIGH-CAPACITY; ELECTROCHEMICAL PROPERTIES; ANODE MATERIALS; FE3O4 NANOPARTICLES; CARBON NANOTUBES; BATTERY ANODES; HIGH-ENERGY; LIMN2O4
Issue Date
2019-10
Publisher
ROYAL SOC CHEMISTRY
Citation
SUSTAINABLE ENERGY & FUELS, v. 3, no. 10, Page. 2675-2687
Abstract
High-capacity electrodes with an ultrathin layer configuration represent a suitable component for modern microbatteries. Herein, we report a simple approach consisting of spin-coating and subsequent heat treatment to achieve a single-layer electrode of Fe3O4@TiO2 core–shell submicron spheres. The singlelayer electrode operates via conversion and insertion reactions with lithium, which are favored by a thin carbon interlayer between the active particles and the copper substrate, without any polymeric binder or nanosized conductive additive. The lithium-ion reaction kinetics and charge transfer characteristics are enhanced by the fine morphological tuning of the electrode particles as well as by the thin carbon interlayer. Indeed, lithium cells using the Fe3O4@TiO2 core–shell submicron spheres and thinnest carbon interlayer exhibit a life that extends over 400 cycles with excellent capacity retention and very high rate capability. These characteristics facilitate the application of the proposed electrode in high-performance Li-ion microbatteries.
URI
https://pubs.rsc.org/en/content/articlelanding/2019/SE/C9SE00259F#!divAbstracthttps://repository.hanyang.ac.kr/handle/20.500.11754/154640
ISSN
2398-4902
DOI
10.1039/c9se00259f
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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