Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 44, Pages 38401-38408Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b09559
Keywords
Sodium ion battery; anode; electrode reactions; MnO nanoparticle; nitrogen-doped carbon nanotube
Funding
- National Natural Science Foundation of China [21471039, 21571043, 21671047]
- Fundamental Research Funds for the Central Universities (PIRS) [HIT A201502, HIT. BRETIII. 201223]
- China Postdoctoral Science Foundation [2014M560253]
- Postdoctoral Scientific Research Fund of Heilongjiang Province [LBH-Q14062, LBH-Z14076]
- Natural Science Foundation of Heilongjiang Province [B2015001]
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Sodium ion batteries (SIBs) have attracted increasing attentions as promising alternatives to lithium ion batteries (LIBs). Herein, we design and synthesize ultrasmall MnO nanoparticles (similar to 4 nm) supported on nitrogen doped carbon nanotubes (NDCT@MnO) as promising anode materials of SIBs. It is revealed that the carbonization temperature can greatly influence the structural features and thus the Na-storage behavior of the NDCT@MnO nanocomposites. The synergetic interaction between MnO and NDCT in the NDCT@MnO nanocomposites provides high rate capability and long-term to cycling life due to high surface area, electrical conductivity, enhanced diffusion rate of Na+ ions, and prevented agglomeration and high stability of MnO nanoparticles. The resulting SIBs provide a high reversible specific capacity of 709 mAh g(-1) at a current density of 0.1 A g(-1) and a high capacity of 536 mAh almost without loss after 250 cycles at 0.2 A g(-1). Even at a high current density of 5 A g(-1), a capacity of 273 mAh g(-1) can be maintained after 3000 cycles.
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