RESUMO
The preparation and characterization of a polyaniline-silver-sulfur nanotube composite were reported in this paper. The polyaniline-silver nanotube composite was synthesized via an oxidation-reduction method in the sodium dodecyl sulfate (SDS) solution. After being vulcanized, the polyaniline-silver-sulfur (Poly (AN-Ag-S)) nanotube composite was prepared as active cathode material and assembled into lithium-sulfur (Li-S) batteries with electrolyte and negative electrode materials. When the feed ratio of raw materials (aniline and AgNO3) was 2:1, the initial specific capacity of poly (AN-Ag-S) composite cells reached 1114 mAh/g. The specific capacity was kept at 573 mAh/g, and the capacity retention rate stayed above 51% after 100 cycles. The introduction of Ag into the composite cathode material can effectively solve the poor conductivity of sulfur and improve the Li-S battery performance.
RESUMO
The title compound, C(18)H(12)N(2)O, crystallizes in a zwitterionic form. The dihedral angle between the planes of the benzene ring and naphthalene ring system is 13.95â (5)°. An intra-molecular N-Hâ¯O inter-action results in the formation of a planar six-membered ring, which is oriented at dihedral angles of 13.50â (4) and 4.49â (4)° with respect to the benzene ring and naphthalene ring system, respectively. In the crystal structure, inter-molecular C-Hâ¯O and C-Hâ¯N inter-actions link the mol-ecules into a two-dimensional network. π-π contacts between the naphthalene systems [centroid-centroid distance = 3.974â (1)â Å] may further stabilize the structure.
RESUMO
The mol-ecule of the title compound, C(22)H(26)N(2)O, displays a trans configuration with respect to the C=N double bond. The dihedral angle between the planes of the two aromatic rings is 26.30â (15)°. There is a strong intra-molecular O-Hâ¯N hydrogen bond between the imine and hydroxyl groups.
