Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 27, Issue 6, Pages 2104-2111Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202004241
Keywords
electrochemical properties; electrochemistry; in situ synthesis; lithium; sodium ion battery; MxSy; N; S co-doped carbon
Categories
Funding
- Fujian provincial project [2019H6005]
- National Key Laboratory [6142808190203]
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A general and simple strategy has been successfully demonstrated for the preparation of metal sulfide nanoparticles immobilized into N/S co-doped carbon through one-step pyrolysis method, forming MxSy/NSC composites. The composites exhibit excellent long-term cycling stability and high capacities in both lithium-ion and sodium-ion batteries.
A general and simple strategy is realized for the first time for the preparation of metal sulfide (MxSy) nanoparticles immobilized into N/S co-doped carbon (NSC) through a one-step pyrolysis method. The organic ligand 1,5-naphthalenedisulfonic acid in the metal-organic framework (MOF) precursor is used as a sulfur source, and metal ions are sulfurized in situ to form MxSy nanoparticles, resulting in the formation of MxSy/NSC (M=Fe, Co, Cu, Ni, Mn, Zn) composites. Benefiting from the MxSy nanoparticles and conductive carbon, a synergistic effect of the composite is achieved. For instance, the composite of Fe7S8/NSC as an anode displays excellent long-term cycling stability in lithium/sodium ion batteries. At 5 A g(-1), large capacities of 645 mA h g(-1) and 426.6 mA h g(-1) can be retained after 1500 cycles for the lithium-ion battery and after 1000 cycles for the sodium-ion battery, respectively.
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