Kolokvij KO: Katsumi Kaneko

Name: Kolokvij KO: Katsumi Kaneko
Start: 2024-10-21T13:15:00+02:00
Location: PMF - Kemijski odsjek

Schedule

Mon Oct 21 2024 at 01:15 pm

UTC+02:00

Location

PMF - Kemijski odsjek | Zagreb, GZ

Pozivamo vas na predavanje 'Scientific Challenges for Nanostructured Carbons with the relevance to Energy Storage and Energy Friendly Separation' koje će u sklopu Kolokvija Kemijskog odsjeka održati Katsumi Kaneko, sa Institute for Aqua Regeneration, Shinshu University, Nagano, Japan. Predavanje će se održati ponedjeljak 21. listopada s početkom u 13:15 sati u predavaonici P1.
ABSTRACT: Carbon has outstanding physical properties such as high electrical conductivity and excellent mechanical strength and chemically and physically robustness. The nanostructured carbon such as nanoporous carbons, single wall carbon nanotube (SWCNT) and graphenes have promising potentials for giving solutions to the global warming issue. This presentation introduces the importance of structural characterization in the following four key topics
The supercapacitors using ionic liquid (IL)s can realize very high energy density. The structure of ionic liquid, EMI-TFSI, in 0.7 nm pores of carbide-derived carbon was studied with HRMC simulation-aided X-ray scattering. We evidenced the partial breaking of Coulombic law for the assembly structure of IL ions.
The ambient pressure storage of high-density methane in nanoporous carbons enables to develop convenient methane cartridges irrespective of the severe difficulty. We coated nanoporous carbon with graphenes which have a thermally switchable valve function. The nanographene valves open at 473 K and close at ambient temperature. The stored methane of large amount can be stably stored for two weeks at least.
The mechanical energy storage using multi-wall carbon nanotube was reported by Baughman et al. However, their stored energy is not necessarily remarkable. We prepared the SWCNT ropes which have the gravimetric energy density (GED) of up to 2.1 MJ kg-1 exceeding by over four orders of magnitude that of mechanical steel springs and by a factor of 3 that of advanced LIBs in addition to the low temperature stability.
Ultrafast-permeable graphene-wrapped crystal membranes which give an excellent separation ability, as evidenced by marked upward-deviation from the upper bound of Robeson plot for H2/CH4. The graphene-wrapped zeolites6 have the subnanoscale channels of < 0.4 nm in width between graphene and their crystal faces, which induce a high selectivity.