Research output: Contribution to journal › Article › peer-review
Pressure-Assisted Interface Engineering in MoS2/Holey Graphene Hybrids for Improved Performance in Li-ion Batteries. / Stolyarova, Svetlana G.; Koroteev, Victor O.; Shubin, Yury V. et al.
In: Energy Technology, Vol. 7, No. 10, 1900659, 01.10.2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Pressure-Assisted Interface Engineering in MoS2/Holey Graphene Hybrids for Improved Performance in Li-ion Batteries
AU - Stolyarova, Svetlana G.
AU - Koroteev, Victor O.
AU - Shubin, Yury V.
AU - Plyusnin, Pavel E.
AU - Makarova, Anna A.
AU - Okotrub, Alexander V.
AU - Bulusheva, Lyubov G.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - The interface between MoS2 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 MoS2, and the compression of components is used during the synthesis. Initial compositions, obtained by deposition of MoS3 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 MoS2 via covalent C–Mo coupling, while the applied pressure assists in the development of a thin MoS2 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 MoS2/HG hybrids synthesized under compression. Enhanced interaction between the components prevents the destruction of MoS2 during discharging–charging of electrodes, and the capacity increases due to the accommodation of lithium between the layers of MoS2 and HG. The structural features of MoS2/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.
AB - The interface between MoS2 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 MoS2, and the compression of components is used during the synthesis. Initial compositions, obtained by deposition of MoS3 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 MoS2 via covalent C–Mo coupling, while the applied pressure assists in the development of a thin MoS2 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 MoS2/HG hybrids synthesized under compression. Enhanced interaction between the components prevents the destruction of MoS2 during discharging–charging of electrodes, and the capacity increases due to the accommodation of lithium between the layers of MoS2 and HG. The structural features of MoS2/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.
KW - holey graphene
KW - hybrids
KW - Li-ion batteries
KW - MoS
KW - near-edge X-ray absorption fine structure
KW - X-ray photoelectron spectroscopy
KW - ANODE MATERIALS
KW - MoS2
KW - MOLYBDENUM-DISULFIDE
KW - ELECTROCHEMICAL PERFORMANCES
KW - GRAPHITE OXIDE
KW - COMPOSITES
KW - POROUS CARBON
KW - MOS2 NANOPARTICLES
KW - TRANSITION-METAL DICHALCOGENIDES
KW - MONOLAYER
KW - LITHIUM
UR - http://www.scopus.com/inward/record.url?scp=85070754026&partnerID=8YFLogxK
U2 - 10.1002/ente.201900659
DO - 10.1002/ente.201900659
M3 - Article
AN - SCOPUS:85070754026
VL - 7
JO - Energy Technology
JF - Energy Technology
SN - 2194-4288
IS - 10
M1 - 1900659
ER -
ID: 21237974