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Monodisperse Sandwich‐Like Coupled Quasi‐Graphene Sheets Encapsulating Ni 2 P Nanoparticles for Enhanced Lithium‐Ion Batteries
Author(s) -
Feng Yangyang,
Zhang Huijuan,
Mu Yanping,
Li Wenxiang,
Sun Junliang,
Wu Kai,
Wang Yu
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201500950
Subject(s) - graphene , materials science , nanoparticle , lithium (medication) , dispersity , nanotechnology , electrochemistry , energy storage , chemical engineering , environmentally friendly , ion , electrode , polymer chemistry , chemistry , organic chemistry , medicine , power (physics) , physics , quantum mechanics , endocrinology , engineering , ecology , biology
In this report, sandwiched Ni 2 P nanoparticles encapsulated by graphene sheets are first synthesized by directly encapsulating functional units in graphene sheets instead of fabricating separate graphene sheets and then immobilizing the functional components onto the generated surfaces. In this strategy, we use low‐cost, sustainable and environmentally friendly glucose as a carbon source and NiNH 4 PO 4 ⋅ H 2 O nanosheets as sacrificial templates. This unique structure obtained here cannot only prevent the nanoparticles from aggregation or loss but also enhance the electronic conductivity compared to the independent nanoparticles. Furthermore, the novel sandwich‐like Ni 2 P/C can be applied in plenty of fields, especially in electrical energy storage. In this paper, a series of electrochemical tests of the sandwich‐like Ni 2 P/C are carried out, which demonstrate the excellent cyclic stability and rate capacity for lithium‐ion batteries.