NOVELTY - Multicomponent material (I) comprises a mixture of many first particles and many second particles, where the first particles and the second particles have an average size of less than 500 nm and the first particles comprise a lithium active compound and the second particles comprise carbon.    USE - (I) is useful in cathode (claimed). (I) is useful in batteries, such as lithium or lithium-ion batteries, fuel cells, solar cells, and other devices.    ADVANTAGE - The lithium iron phosphate is safer than other commonly used materials (lithium cobaltate or lithium vanadate) because of a minimized risk of runaway heating and explosion. The process is scalable for mass production of multicomponent nanoparticles materials. (I) enhances the electrical conductivity of the cathode.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a cathode comprising the multicomponent material, where: many lithium iron phosphate particles are intimately and randomly mixed with many carbon particles; and the lithium iron phosphate particles have an average size of less than 100 nm and the carbon particles have an average size of less than 50 nm;    (2) forming a multicomponent material, comprising: forming a first aerosol; forming a second aerosol; and combining the first aerosol (106) and second aerosol (110) to form the material comprised of the first particles from the first aerosol and the second particles from the second aerosol, where the first particles either: (a) are compositionally distinct from the second particles or (b) have an average size that is distinct from the average size of the second particles or both;    (3) forming a composite, comprising: forming a first aerosol of lithium active compound particles; forming a second aerosol of carbon particles; and combining the first aerosol with the second aerosol in a reducing environment to form a composite comprising the lithium active compound particles and carbon particles; and    (4) an apparatus for combining distinct aerosols, comprising a first burner or atomizer (104) for forming a first aerosol; a second burner or atomizer (108) forming a second aerosol: a chamber in fluid communication with the first and second burner or atomizer for receiving and mixing the first and second aerosols; and an exit port connected to the chamber for allowing the aerosols to escape the chamber, where the first burner or atomizer is capable of either: (a) forming an aerosol that is compositionally distinct from the aerosol formed from the second burner or atomizer or (b) forming an aerosol that has an average size that is significantly different from the aerosol formed from the second burner or atomizer.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an apparatus for generating multicomponent nanoparticle films.    Substrate (102)    First atomizer (104)    First aerosol (106)    Second atomizer (108)    Second aerosol. (110)