Loading…
In situ micro-current collector of amorphous manganese dioxide as cathode material for sodium-ion batteries
Amorphous manganese dioxide (a-MnO 2 ) as an ideal cathode in sodium-ion batteries (SIBs) possesses a higher theoretical capacity (308 mAh g −1 ), low cost and high-rate capability due to its smaller particle size (5–50 nm) and the abundant manganese in the earth. However, the low electronic conduct...
Saved in:
Published in: | Ionics 2022-03, Vol.28 (3), p.1211-1217 |
---|---|
Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Amorphous manganese dioxide (a-MnO
2
) as an ideal cathode in sodium-ion batteries (SIBs) possesses a higher theoretical capacity (308 mAh g
−1
), low cost and high-rate capability due to its smaller particle size (5–50 nm) and the abundant manganese in the earth. However, the low electronic conductivity brings a poor cycle stability. In this work, we have prepared a-MnO
2
material with an in-situ composite polyaniline (PANI) layer as cathode for SIBs. The composite cathode material shows a reversible specific capacity of 175.4 mAh g
−1
and keeps at 173.2 mAh g
−1
after 200 cycles at 0.1 C in SIBs. The electrochemical impedance (EIS) and galvanostatic intermittent titration technique (GITT) indicate that this material shows a higher electronic conductivity and outstanding Na-ion storage performance. |
---|---|
ISSN: | 0947-7047 1862-0760 |
DOI: | 10.1007/s11581-021-04403-4 |