期刊
APPLIED SURFACE SCIENCE
卷 534, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147635
关键词
Polyaniline-derived carbon nanotubes; Potassium-ion batteries; N-doping; Synergistic effect
类别
资金
- National Natural Science Foundation of China [NSFC 51877216]
- Taishan Scholar Foundation [tsqn20161017]
- Major Program of Shandong Province Natural Science Foundation [ZR201801280009]
- Fundamental Research Funds for the Central Universities [18CX05007A, 19CX05001A, 19CX05002A]
Potassium-ion batteries (PIBs), as an inexpensive alternative to lithium-ion batteries (LIBs), have attracted significant attention for large-scale energy storage owing to their high capacity and low cost. The polyaniline (PANI) is a promising carbon source for high-performance PIBs anodes because of its diversity of morphologies and high N content. However, the PANI-derived carbon is rarely utilized as PIBs anode. Herein, the cross-linked porous N-doped carbon nanotubes (N-CLNTs) were prepared through the carbonization of PANI nanotubes. By adjusting the carbonization temperature, the N-CLNTs with different N content were designed to systematically elaborate on the effect of the N-doping on the electrochemical properties for PIB anodes. Owing to the synergistic effect of the high N-5/N-6 content and unique 1D tubular structure, the N-CLNTs-700 delivers a reversible capacity of 261 mAh g(-1) at 0.05 A g(-1) after 150 cycles and can still remain 168 mAh g(-1) at 2 A g(-1) over 3000 cycles. These results shed light on the design of carbon materials to efficiently enhance the electrochemical performance of PIBs.
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