Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 17, Pages 15630-15637Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b02555
Keywords
sodium-ion battery; sodium manganate; hollow microsphere; polypyrrole; electrochemical property
Funding
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
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Advanced electrode materials play a very important role in the development of large-scale production of sodium-ion batteries. Herein, Na0.7MnO2.05 hollow microspheres with diameters of 2 mu m and a shell thickness of 200 nm are prepared and then modified by polypyrrole (PPy) coating. As cathodes for sodium-ion batteries, the designed PPy-coated sodium manganate hollow microspheres demonstrate enhanced electrochemical performances, with an initial capacity of 165.1 mAh g(-1) capacity retention of 88.6% at 0.1 A g(-1) after 100 cycles, and improved rate capability. The excellent electrochemical properties are attributed to the improved electroconductivity and the high stability of hollow spherical structure of sodium manganate oxide particles due to the introduction of conductive polymer coating.
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