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...

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