Two films containing CrMnFeCoNi were electroplated on a copper plate in an organic solvent of DMF（N, N-dimethylformamide）- CH₃CN（acetonitrile）with and without a LiClO₄ supporting electrolyte. Their surface morphologies, components, and crystal structures were analyzed using SEM, XRD, EDS, TOF-SIMS, and TEM. Both films contained large amounts of oxygen and carbon, irrespective of presence or absence of LiClO₄. Film A obtained in solution without LiClO₄ was about 0.5 μm thick, with uniform distributions of Cr, Mn, Fe, Co, and Ni, containing more Ni than others. An amorphous structure mixed with nanocrystals was detected in film A. Film B obtained in solution with LiClO₄ was about 3.6 μm thick, with an inner layer, an intermediate layer, and an outer layer. Lithium oxide in the inner layer and lithium oxide / carbonate in the outer layer were detected. The uniform distributions of Cr, Mn, Fe, Co, and Ni were found mainly in the intermediate layer. Film B, which is delaminated easily from copper in water, is unstable when exposed to electron irradiation.

Direct Solar Steam Generator（DSSG）is a technology that is currently attracting attention due to its advantages over conventional evaporative desalination technologies, such as the fact that it does not use fossil energy and has a photothermal conversion efficiency of almost 100%. The DSSG system is composed of steam generating membrane including photothermal and water transportation materials. Thus, the performance of DSSG system depends on the photothermal and water transportation materials, and heat management of system. Recently, carbon materials are considered as good photothermal materials under one sun irradiation（1 kW/m²）. Carbons synthesized by the solution plasma（SP）method show good feature such as porous structures, large surface area, and fast transportation of water. In this study, we synthesized photothermal carbon materials by SP method and prepared films composed of poly（vinyl alcohol）（PVA）and chitosan aerogel（CSA）with high affinity to water by freeze-drying, and composited carbon and PVA/CSA film（C_x/PVA/CSA: x＝0.1，0.5，1.0）．The morphologies and evaporation performance of the C_x/PVA/CSA were investigated. The evaporation rate and evaporation efficiency of C_0.5/PVA/CSA were estimated to be 1.29 kg/m²･hand 86.1%, respectively. These values showed excellent evaporation performance within the range of C additions investigated. Finally, the desalination test of DSSG system using the C_0.5/PVA/CSA was performed and the DSSG system showed desalination performance of more than 99.3% for Na^＋, Ca^2＋ and Mg^2＋ ion concentrations in sea water obtained from Toyosu canal.