Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 23, Pages 19626-19632Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b02819
Keywords
ZnSe microspheres; multiwalled carbon nanotubes; sodium-ion batteries; high-rate; long-life
Funding
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- National Key Research and Development Program of China [2016YFA0202603]
- National Natural Science Foundation of China [51521001, 51602239]
- Hubei Provincial Natural Science Foundation [2016CFB267]
- Fundamental Research Funds for the Central Universities [2016IVA090, 2017III005, 2017III006]
- Henan Provincial Natural Science Foundation [182102410100]
- Education Department of Henan Province [17A430004, 16A140012]
- China Postdoctoral Science Foundation [2016M592401]
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Sodium-ion batteries (SIBs) are considered as one of the most favorable alternative devices for sustainable development of modern society. However, it is still a big challenge to search for proper anode materials which have excellent cycling and rate performance. Here, zinc selenide microsphere and multiwalled carbon nanotube (ZnSe/MWCNT) composites are prepared via hydrothermal reaction and following grinding process. The performance of ZnSe/MWCNT composites as a SIB anode is studied for the first time. As a result, ZnSe/MWCNTs exhibit excellent rate capacity and superior cycling life. The capacity retains as high as 382 mA h g(-1) after 180 cycles even at a current density of 0.5 A g(-1). The initial Coulombic efficiency of ZnSe/MWCNTs can reach 88% and nearby 100% in the following cycles. The superior electrochemical properties are attributed to continuous electron transport pathway, improved electrical conductivity, and excellent stress relaxation.
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