Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 51, Pages 61555-61564Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c20154
Keywords
CoSe2; anode; TiO2 coating; pseudocapacitance; sodium-ion full cell
Funding
- National Natural Science Foundation of China [91961126, 22078029]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [SJCX21_1180]
- Jiangsu Development & Reform Commission
- Changzhou Development & Reform Commission
- Qing Lan Project of Education Department of Jiangsu Province [SJCX21_1180]
Ask authors/readers for more resources
This study successfully prepared CoSe2/nitrogen-doped carbon-skeleton hybrid microcubes with a TiO2 layer, which exhibited superior cycling performance and long cycling life. The research provides a new approach to enhance the battery performance of metal selenide-based anodes.
Cobalt diselenide (CoSe2) has drawn great concern as an anode material for sodium-ion batteries due to its considerable theoretical capacity. Nevertheless, the poor cycling stability and rate performance still impede its practical implantation. Here, CoSe2/nitrogen-doped carbon-skeleton hybrid microcubes with a TiO2 layer (denoted as TNC-CoSe2) are favorably prepared via a facile template-engaged strategy, in which a TiO2-coated Prussian blue analogue of Co-3[Co(CN)(6)](2) is used as a new precursor accompanied with a selenization procedure. Such structures can concurrently boost ion and electron diffusion kinetics and inhibit the structural degradation during cycling through the close contact between the TiO2 layer and NC-CoSe2. Besides, this hybrid structure promotes the superior Na-ion intercalation pseudocapacitance due to the well- designed interfaces. The as-prepared TNC-CoSe2 microcubes exhibit a superior cycling capability (511 mA h at 0.2 A g(-1) after 200 cycles) and long cycling life (456 mA h at 6.4 A g(-1) for 6000 cycles with a retention of 92.7%). Coupled with a sodium vanadium fluorophosphate (Na3V2(PO4)(2)F-3)@C cathode, this assembled full cell displays a specific capacity of 281 mA h g(-1) at 0.2 A g(-1) for 100 cycles. This work can be potentially used to improve other metal selenide-based anodes for rechargeable batteries.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available