| 摘要 |
#CMT# #/CMT# Preparation of electrolyte capacitor comprises applying a dispersion containing at least an electrically conductive polymer particle and a dispersing agent on a porous body; and forming a solid electrolyte, in which the dielectric surface is partially or totally coated by the dispersion agent and at least partially removing the dispersion agent and hardening the obtained components. #CMT# : #/CMT# Preparation of electrolyte capacitor comprises applying a dispersion containing at least an electrically conductive polymer particle and a dispersing agent on the porous body containing the porous electrode body of an electrode material and dielectric that coats the surface of the electrode material; and forming a solid electrolyte, in which the dielectric surface is partially or totally coated by the dispersion agent and at least partially removing the dispersion agent and hardening the obtained components, where electrically conductive polymer particle in the dispersion has an average diameter of 1-100 nm and exhibits a film of specific electrical conductivity of more than 10 S/cm in dry condition. Independent claims are included for: (1) an electrolytic capacitor obtained by the above process; and (2) an electronic circuit containing an electrolytic capacitor. #CMT#USE : #/CMT# The electrolytic capacitor is useful in electronic circuits (claimed). #CMT#ADVANTAGE : #/CMT# The electrolyte capacitor exhibits high nominal voltage, low equivalent serial resistance and low residual current. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The diagram schematically represents the solid electrolyte capacitor: 1 : Capacitor body; 5 : Optionally conductive external layer; 6 : Graphite/Silver layer; 8 : External contacts; 9 : Encapsulation. #CMT#INORGANIC CHEMISTRY : #/CMT# Preferred Process: The partial removing- and hardening- process takes place repeatedly. Preferred Components: The average particle diameter (d 9 0) of the particle is less than 150 nm. The diameter (d 1 0) distribution of the particle is greater than 1 nm. The dispersion contains a metal cation less than 5000 mg/kg, preferably transition metals of less than 1000 mg/kg. The amount of iron content in the dispersion is less than 1000 mg/kg. The dispersion contains organic solvent and/or water, as dispersing agent, further contains cross-linker, surface active substances and/or additives such as ether-, lactone-, amide-, lactam-compounds, sulfone, sulfoxide, sugar or its derivative, sugar alcohol, furan derivative and/or di- or poly alcohol. The dispersion is sensitive to dielectric at a pH of 4-8. The viscosity of the dispersion is 1-200 mPas (measured at 20[deg]C and a shear rate of 100 S -> 1>). The electrode material of the electrode body with a valve metal or compounds with a valve metal has comparable electrical characteristics. The valve metal is niobium, niobium oxide of formula (NbO x) (both preferred), tantalum, aluminum, titanium, zirconium, hafnium, vanadium or their alloys. The niobium oxides are niobium nitride, niobium oxynitride and/or their alloys. The solid electrolyte is further optionally contacted with electrically conductive external contacts. The electrolyte capacitor has a specific charge of 500-500000 mu C/g, related to the weight of the electrodes body coated with a dielectric.x = 0.8-1.2. #CMT#[Image]#/CMT# #CMT#POLYMERS : #/CMT# Preferred Components: The electrically conductive polymer is at least an optionally substituted polypyrrole, polyaniline or polythiophene with repeating units of formula (I) or (II). The polymer particle is poly(3,4-ethylene dioxythiophene). The particle further contains an anionic polymer such as carboxylic- or sulfonic-acid polymer, preferably polystyrene sulfonic acid. A : optionally substituted 1-5C-alkylene; R : optionally substituted 1-18C-alkyl, 5-12C-cycloalkyl, 6-14C-aryl, 7-18C-aralkyl, 1-4C-hydroxyalkyl or hydroxyl; and x : 0-8. #CMT#EXAMPLE : #/CMT# Tantalum powder with a specific capacity of 30000 mu FV/g was pressed to a pellet. The porous electrode body (with an average pore diameter of 960 nm) was anodically oxidized (15 V) in a phosphorous acid electrolyte to obtain an oxidized electrode body with an oxide film thickness of 270 nm. The obtained oxidized electrode body was immersed in a dispersion (comprising sodium (110 mg/kg), magnesium (0.58 mg/kg), aluminum (1 mg/kg), silicon (1.2 mg/kg), phosphor (5.9 mg/kg), potassium (0.53 mg/kg), calcium (3.9 mg/kg), chromium (0.16 mg/kg), iron (0.89 mg/kg) and zinc (less than 0.01 mg/kg)) (100 g), dimethylsufoxide (1.4 g) and 3-glycidoxy propyltrimethoxysilane (0.5 g). The dispersion was removed using water and dried at 120[deg]C for 10 minutes to obtain the solid electrolyte capacitor. |
