Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 Oct 1;28(19):6903.
doi: 10.3390/molecules28196903.

Heterointerface Engineered Core-Shell Fe2O3@TiO2 for High-Performance Lithium-Ion Storage

Zeqing Miao  1 , Kesheng Gao  1 , Dazhi Li  2 , Ziwei Gao  1 , Wenxin Zhao  2 , Zeyang Li  2 , Wei Sun  2 , Xiaoguang Wang  3 , Haihang Zhang  3 , Xinyu Wang  3 , Changlong Sun  2 , Yuanyuan Zhu  4 , Zhenjiang Li  2
Affiliations

Heterointerface Engineered Core-Shell Fe2O3@TiO2 for High-Performance Lithium-Ion Storage

Zeqing Miao et al. Molecules. .

Abstract

The rational design of the heterogeneous interfaces enables precise adjustment of the electronic structure and optimization of the kinetics for electron/ion migration in energy storage materials. In this work, the built-in electric field is introduced to the iron-based anode material (Fe2O3@TiO2) through the well-designed heterostructure. This model serves as an ideal platform for comprehending the atomic-level optimization of electron transfer in advanced lithium-ion batteries (LIBs). As a result, the core-shell Fe2O3@TiO2 delivers a remarkable discharge capacity of 1342 mAh g-1 and an extraordinary capacity retention of 82.7% at 0.1 A g-1 after 300 cycles. Fe2O3@TiO2 shows an excellent rate performance from 0.1 A g-1 to 4.0 A g-1. Further, the discharge capacity of Fe2O3@TiO2 reached 736 mAh g-1 at 1.0 A g-1 after 2000 cycles, and the corresponding capacity retention is 83.62%. The heterostructure forms a conventional p-n junction, successfully constructing the built-in electric field and lithium-ion reservoir. The kinetic analysis demonstrates that Fe2O3@TiO2 displays high pseudocapacitance behavior (77.8%) and fast lithium-ion reaction kinetics. The capability of heterointerface engineering to optimize electrochemical reaction kinetics offers novel insights for constructing high-performance iron-based anodes for LIBs.

Keywords: built-in electric field; electrochemical kinetics; heterointerface engineering; iron-based anode; lithium-ion storage.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Characterization of Fe2O3@TiO2 heterostructure: (a) XRD patterns; (b–i) TEM, SAED, and HRTEM images; (j) XPS survey spectrum and high-resolution XPS survey spectra of (k) Fe 2p orbital, (l) Ti 2p orbital, and (m) O 1s orbital.
Figure 2
Figure 2
(a) Crystal structure image of α-Fe2O3. Electrochemical properties of Fe2O3 as anode material for LIBs: (b) CV curves at a scan rate of 0.1 mV s−1; (c) cycling performance at a current density of 0.1 A g−1, (d) GCD curves, (e) capacity retention and linear fit curve; (f) rate performance from 0.1 A g−1 to 4.0 A g−1.
Figure 3
Figure 3
(a) Crystal structure image of anatase-TiO2. Electrochemical properties of TiO2 as anode material for LIBs: (b) CV curves at a scan rate of 0.1 mV s−1; (c) cycling performance at a current density of 0.1 A g−1, (d) GCD curves, (e) capacity retention and fitted linear curve; (f) rate performance from 0.1 A g−1 to 4.0 A g−1.
Figure 4
Figure 4
(a) Model image of half-cell. Electrochemical properties of Fe2O3@TiO2 heterostructure as anode material for LIBs: (b) CV curves at a scan rate of 0.1 mV s−1; (c) cycling performance at a current density of 0.1 A g−1, (d) GCD curves, (e) capacity retention and fitted linear curve; (f) rate performance from 0.1 A g−1 to 4.0 A g−1.
Figure 5
Figure 5
(a) CV curves of Fe2O3@TiO2 heterostructure at different scan rates from 0.1 to 1.0 mV s−1; (b) the b-values of corresponding oxidation peaks and reduction peaks; (c) area ratio image of pseudocapacitance at 1.0 mV s−1; (d) ratio image of pseudocapacitance contribution at different scan rates from 0.1 to 1.0 mV s−1.
See this image and copyright information in PMC

References

    1. Sun C., Chen F., Tang X., Zhang D., Zheng K., Zhu G., Bin Shahid U., Liu Z., Shao M., Wang J. Simultaneous interfacial interaction and built-in electric field regulation of GaZnON@NG for high-performance lithium-ion storage. Nano Energy. 2022;99:107369. doi: 10.1016/j.nanoen.2022.107369. - DOI
    1. Zhao L., Ning Y., Dong Q., Ullah Z., Zhu P., Zheng S., Xia G., Zhu S., Li Q., Liu L. Longer cycle life and higher discharge voltage of a small molecular indanthrone resulting from the extended conjugated framework. J. Power Sources. 2023;556:232518. doi: 10.1016/j.jpowsour.2022.232518. - DOI
    1. Mostafa M.M.M., Alshehri A.A., Salama R.S. High performance of supercapacitor based on alumina nanoparticles derived from Coca-Cola cans. J. Energy Storage. 2023;64:107168. doi: 10.1016/j.est.2023.107168. - DOI
    1. Yan Z., Li J., Chen Q., Chen S., Luo L., Chen Y. Synthesis of CoSe2/Mxene Composites Using as High-performance Anode Materials for Lithium-ion Batteries. Adv. Compos. Hybrid Mater. 2022;5:2977–2987. doi: 10.1007/s42114-022-00524-0. - DOI
    1. Zhu Y., Zhang Y., Das P., Wu Z.-S. Recent Advances in Interface Engineering and Architecture Design of Air-Stable and Water-Resistant Lithium Metal Anodes. Energy Fuels. 2021;35:12902–12920. doi: 10.1021/acs.energyfuels.1c01904. - DOI