In:
Energy Technology, Wiley, Vol. 7, No. 10 ( 2019-10)
Abstract:
The interface between MoS 2 and carbon components plays an important role in the performance of the hybrid material in Li‐ion batteries. To enhance the interfacial interactions, holey graphene (HG) layers are used as a support for the forming MoS 2 , and the compression of components is used during the synthesis. Initial compositions, obtained by deposition of MoS 3 on the surface of HG stacks, are annealed at 400–600 °C and 100 bar. Using a set of characterization methods, the synthesis products are studied and it is found that the hole boundaries anchor MoS 2 via covalent C–Mo coupling, while the applied pressure assists in the development of a thin MoS 2 coating. The number of layers and their lateral dimensions are dependent on the synthesis temperature. The tests of Li‐ion half‐cells detected higher values of specific capacity for MoS 2 /HG hybrids synthesized under compression. Enhanced interaction between the components prevents the destruction of MoS 2 during discharging–charging of electrodes, and the capacity increases due to the accommodation of lithium between the layers of MoS 2 and HG. The structural features of MoS 2 /HG hybrids stipulate growth of specific capacity with long‐term cycling to ≈1200 mA h g −1 at a current density of 0.5 A g −1 .
Type of Medium:
Online Resource
ISSN:
2194-4288
,
2194-4296
DOI:
10.1002/ente.201900659
Language:
English
Publisher:
Wiley
Publication Date:
2019
detail.hit.zdb_id:
2700412-0
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