This review presents the progress of the change of the PSK structure from 3 dimensional CH3NH3PbX3 to mixed cations or halides based PSKs and finally to Ruddlesden–Popper PSK two dimensional (2D) homologous structures regarding the lifetime improvement.
Osmotic dehydration
(OD) was introduced as a method to reproducibly
tune the water content and porosity of cellulose nanofiber (CNF) hydrogels.
The hierarchical porosity was followed by electron microscopy (pores
with a >100 μm diameter) and thermoporosimetry (mesopores),
together with mechanical testing, in hydrogels with solid contents
ranging from 0.7 to 12 wt %. Furthermore, a reciprocal correlation
between proton conductivity and the ratio of water bound to the nanocellulose
network was established, suggesting the potential of these systems
toward tunable energy materials.
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