期刊
ADVANCED FUNCTIONAL MATERIALS
卷 28, 期 18, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201800003
关键词
flexible soft-packed pouch cells; lithium-ion batteries; manganese monoxide nanoparticles; nitrogen-doped carbon nanocapsules; walnut-like multicore-shell composite structures
类别
资金
- National Key R&D Program of China [2017YFA0208200, 2016YFB0700600, 2015CB659300]
- Projects of NSFC [21403105, 21573108, 51761135104]
- Natural Science Foundation of Jiangsu Province [BK20150583, BK20170644]
- Fundamental Research Funds for the Central Universities [020514380107]
Metal oxide-based nanomaterials are widely studied because of their high-energy densities as anode materials in lithium-ion batteries. However, the fast capacity degradation resulting from the large volume expansion upon lithiation hinders their practical application. In this work, the preparation of walnut-like multicore-shell MnO encapsulated nitrogen-rich carbon nanocapsules (MnO@NC) is reported via a facile and eco-friendly process for long-cycling Li-ion batteries. In this hybrid structure, MnO nanoparticles are uniformly dispersed inside carbon nanoshells, which can simultaneously act as a conductive framework and also a protective buffer layer to restrain the volume variation. The MnO@NC nanocapsules show remarkable electrochemical performances for lithium-ion batteries, exhibiting high reversible capability (762 mAh g(-1) at 100 mA g(-1)) and stable cycling life (624 mAh g(-1) after 1000 cycles at 1000 mA g(-1)). In addition, the soft-packed full batteries based on MnO@NC nanocapsules anodes and commercial LiFePO4 cathodes present good flexibility and cycling stability.
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