Effect of Nitrogen Doping on the Performance of Mesoporous CMK-8 Carbon Anodes for Li-Ion Batteries
Artikel i vetenskaplig tidskrift, 2020

Designing carbonaceous materials with heightened attention to the structural properties such as porosity, and to the functionalization of the surface, is a growing topic in the lithium-ion batteries (LIBs) field. Using a mesoporous silica KIT-6 hard template, mesoporous carbons belonging to the OMCs (ordered mesoporous carbons) family, namely 3D cubic CMK-8 and N-CMK-8 were synthesized and thoroughly structurally characterized. XPS analysis confirmed the successful introduction of nitrogen, highlighting the nature of the different nitrogen atoms incorporated in the structure. The work aims at evaluating the electrochemical performance of N-doped ordered mesoporous carbons as an anode in LIBs, underlining the effect of the nitrogen functionalization. The N-CMK-8 electrode reveals higher reversible capacity, better cycling stability, and rate capability, as compared to the CMK-8 electrode. Coupling the 3D channel network with the functional N-doping increased the reversible capacity to similar to 1000 mAh center dot g(-1) for the N-CMK-8 from similar to 450 mAh center dot g(-1) for the undoped CMK-8 electrode. A full Li-ion cell was built using N-CMK-8 as an anode, commercial LiFePO4, a cathode, and LP30 commercial electrolyte, showing stable performance for 100 cycles. The combination of nitrogen functionalization and ordered porosity is promising for the development of high performing functional anodes.

lithium-ion batteries (LIB)

ordered mesoporous carbon (OMC)

CMK-8

nitrogen doping

functional materials

Författare

Giulio Calcagno

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Marco Agostini

Chalmers, Fysik, Materialfysik

Shizhao Xiong

Chalmers, Fysik, Materialfysik

Aleksandar Matic

Chalmers, Fysik, Materialfysik

Anders Palmqvist

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Carmen Cavallo

Chalmers, Fysik, Materialfysik

Universitetet i Oslo

Energies

1996-1073 (ISSN)

Vol. 13 19 4998

Energi OCH Effekt: Hybridsuperkondensatorer

Energimyndigheten, 2015-01-01 -- 2018-12-31.

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemiteknik

DOI

10.3390/en13194998

Mer information

Senast uppdaterat

2020-12-03