With　the　miniaturization　of　integrated　circuits　driving　increased　demand　for　high-frequency　alternating　current　(AC)-line　filtering　capacitors,　portable　electrochemical　capacitors　(ECs)　must　reconcile　two　persistent　challenges:　i)　the　inherent　contradiction　in　synergistic　enhancement　between　areal　capacitance　(C-A)　and　volumetric　capacitance　(C-V)　at　the　condition　of　high　frequency　response,　and　ii)　developing　scalable　fabrication　methods.　To　address　these　issues,　an　electrostatic-induced　Marangoni　assembly　process　is　introduced,　which　enables　large-area,　rapid　deposition　of　poly(3,4-ethylenedioxythiophene)　(PEDOT)　films　with　a　uniform,　3D　fibrous　porous　network.　By　pre-treating　the　PEDOT:poly(styrenesulfonate)　(PSS)　ink　with　a　polar　solvent　and　applying　an　electrostatic　field,　Marangoni　flows　align　microdroplets　into　a　continuously　interconnected　3D　architecture.　This　structure　not　only　facilitates　ultrafast　ion　transport　but　also　provides　abundant　storage　sites,　yielding　a　sultaneous　enhancement　in　C-A　(1.72　mF　cm(-)(2))　and　C-V　(13.2　F　cm(-)(3)),　as　well　as　an　exceptional　phase　angle　of　-82.9　degrees　at　120　Hz.　These　metrics　surpass　those　of　most　reported　carbon-　and　PEDOT-based　filtering　capacitors.　Moreover,　the　method　accommodates　high-loading　of　pseudocapacitive　materials,　demonstrating　its　versatility　for　composite　electrode　engineering.　Subsequent　AC-line　filtering　tests　confirm　the　practical　applicability　of　these　electrodes,　offering　a　scalable　route　to　miniaturized　capacitors　with　synergistically　optimized　C-A　and　C-V.