4.6 Article

Spatially Self-Confined Formation of Ultrafine NiCoO2 Nanoparticles@Ultralong Amorphous N-Doped Carbon Nanofibers as an Anode towards Efficient Capacitive Li+ Storage

期刊

CHEMISTRY-A EUROPEAN JOURNAL
卷 25, 期 3, 页码 863-873

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201804823

关键词

carbon; electrochemistry; lithium-ion batteries; mesoporous materials; nanostructures

资金

  1. National Natural Science Foundation of China [51502003, 51572005, 51772127, 51772131]
  2. Anhui Province Funds for distinguished Young Scientists [1508085J09]
  3. Major Program of Shandong Province Natural Science Foundation [ZR2018ZB0317]
  4. Taishan Scholars [ts201712050]

向作者/读者索取更多资源

The exploration of anode materials with a high degree of electrochemical utilization for Li-ion batteries (LIBs) still remains a huge challenge despite pioneering breakthroughs. Rational engineering of electrode structures/components by facile strategies would offer infinite possibilities for the development of LIBs. In this study, one-dimensional ultralong nanohybrids of ultrafine NiCoO2 nanoparticles dispersed in situ in and/or on the surface of amorphous N-doped carbon nanofibers (NCO@ANCNFs) were fabricated by a bottom-up electrospinning protocol. By virtue of synergistic structural/component features, the obtained ultralong NCO@ANCNFs with low NCO loading (approximate to 33.6 wt %) show highly efficient Li+ storage performance with high reversible capacity, high rate capability, and long cycle life. The unusual reversible crystalline transformation during cycling was analyzed. Quantitative analysis revealed that the pseudocapacitive contribution mainly accounts for the superior lithium storage of the NCO@ANCNFs. Besides, the ability of the hybrid anode to deliver competitive Li-storage properties even without conductive carbon greatly enhances its commercial applicability. An NCO@ANCNFs//LiNi0.8Co0.15Al0.05O2 full battery was assembled and exhibited striking electrochemical properties. This contribution offers a scalable methodology to fabricate highly efficient hybrid anodes for advanced next-generation LIBs.

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