Layered transition metal dichalcogenides, MX2, where M is a transition metal from groups 4 to 6 and X is S, Se, or Te, have potential as high discharge capacity materials in lithium-ion batteries. In these materials, individual layers of MX2 are held together by van der Waals forces, which permits the intercalation of ions or small molecules, as well as separation into mono- or multilayer nanomaterials. To date, studies with MoS2 nanoplatelets (>10 nm thickness) have shown that this MX2 material does not performed as well as expected in lithium-ion battery applications. We propose that the higher surface area of MX2 nanosheets (<10 nm thickness), which can be achieved by complete exfoliation, would allow more extensive interactions between lithium ions and the active MX2 material, and thus better battery capacity performance. We present electrode fabrication and coin cell test results for MoS2, TaSe2, WSe2, NbSe2, TiS2 and TiSe2.

Nanosheets of layered transition metal dichalcogenides for lithium-ion batteries

245th National Meeting (2013)

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