Spray-On XXXX / @entity3880 Electrodes with Enhanced Electrochemical Stability.

@entity3884 @entity8357 @entity16903 @entity3880 @entity23551
UNASSIGNED: @entity16903 ( @entity23551 )-based electrodes are promising candidates for energy storage, but their cycle life remains poor. Recent work suggests that secondary interactions may enhance @entity16903 's electrochemical stability and cycle life, but evidence to date is not conclusive. Here, we investigate spray-assisted layer-by-layer assemblies containing @entity16903 nanofibers ( @entity23551 NFs) or conventional @entity23551 and @entity3880 ( @entity3880 ), which provides @entity3884 bonding and electrostatic interactions. This spray-on approach may be suitable for the deposition of @entity23551 onto a variety of surfaces. The effects of @entity23551 type, @entity3880 pH, and @entity3880 molecular weight on the growth behavior, conductivity, and electrochemical performance are examined. It is shown that LbL films with @entity23551 NFs, higher molecular weight @entity3880 , and lower @entity3880 pH yield the thickest films, whereas the thinnest films come from conventional @entity23551 assembled under similar conditions. Electron microscopy imaging and density measurements show that LbL films containing @entity23551 NFs are very porous, whereas those containing conventional @entity23551 are very dense (0.28 vs 1.33 g/cm(3), respectively). The difference in density dramatically affects the electrochemical properties in terms of capacity and long-term cycling behavior. Upon extended cycling, @entity23551 NFs alone rapidly lose their electrochemical activity. On the other hand, @entity23551 NF-based LbL films exhibited somewhat enhanced stability, and @entity23551 -based LbL films were exceptionally stable, maintaining 94.7% of their capacity after 1000 cycles when cycled up to 4.2 V vs @entity8357 / @entity8357 . These results show that secondary interactions from @entity3880 enhance stability, as does the selection of @entity23551 type and the electrode's density.
