Methods, spray devices, and kits for the in situ formation of silk fibroin fibers and/or aerosols are disclosed. Rapidly mixing a silk fibroin solution and a beta sheet initiation solution forms a mixed solution, which is rapidly expanded to form the silk fibroin fibers and/or aerosols. The beta sheet initiation solution includes a hygroscopic polymer having a molecular weight of between 7.5 kDa and 15.0 kDa. The rapid mixing and rapid expanding occur within one second of one another. Silk fibroin aerosols are formed when a molecular weight distribution of fragments in the silk fibroin solution is below an aerosol-fiber threshold. Silk fibroin fibers are formed when the molecular weight distribution is below the aerosol-fiber threshold.

A method of forming a dispersion comprising drops having a fatty phase dispersed in a gelled continuous aqueous phase. The method includes: providing a fatty phase comprising at least one oil; providing an aqueous phase, that is substantially immiscible with the fatty phase, comprising at least water and at least one hydrophilic gelling agent capable of gelling in the presence of at least one salt; forming fatty phase drops in the aqueous phase or the gelled continuous aqueous phase; conveying the drops in a circulation duct; recovering a dispersion comprising drops and the gelled continuous aqueous phase in a container. The method further includes: before the forming step, adding, to the aqueous phase, at least one portion of an aqueous solution; and/or injecting at least one portion of the aqueous solution into the circulation duct or at the outlet of the circulation duct upstream of the container.

A system for preparing a biomass slurry for subterranean injection can include a mixing apparatus having a vessel and a first input to the vessel, where the first input is configured to receive a plurality of pieces of a biomass slurry feedstock, where each of the plurality of pieces has a size not to exceed approximately 60,000 m. The mixing apparatus may also include a second input to the vessel, where the second input is configured to receive a fluid to the vessel, and wherein the fluid comprises a salt content of at least approximately 0.05%. The mixing apparatus may further include a mixer configured to combine the plurality of pieces of the biomass slurry feedstock and the fluid within the vessel to form the biomass slurry, and an output to the vessel that is configured to deliver the biomass slurry to a conveyance system for the subterranean injection.

Disclosed are methods of manufacturing negative electrode slurry for all-solid-state batteries, negative electrodes manufactured by the methods, and all-solid-state batteries including the negative electrodes. The method of manufacturing a negative electrode slurry includes preparing a first mixture by mixing a negative electrode material with a binder solution that includes a solvent and a first binder, producing a dispersion by performing an ultrasonic dispersion treatment on the first mixture, and preparing a second mixture by adding a second binder to the dispersion.