Embodiments described herein relate to compositions, devices, and methods for storage of energy (e.g., electrical energy). In some cases, devices including polyacetylene-containing polymers are provided.

The present invention relates to an additive for an electrochemical element positive electrode comprising an activated carbon, wherein the activated carbon has a specific surface area in accordance with BET method of 1300-2500 m.sup.2/g, a pore volume of pores having a diameter of 2 nm or more of 0.35 cm.sup.3/g or less, a pore volume of pores having a diameter less than 2 nm of 0.5 cm.sup.3/g or more, and an ash content of 0.5% by weight or less.

Disclosed is an aluminum ion capacitor, including a separator, an anode and a cathode, between which the separator is interposed, and an electrolyte contacting the anode and the cathode, wherein the anode contains aluminum, the electrolyte contains aluminum ions, and an electrical double layer is formed at the cathode and intercalation and deintercalation of aluminum ions are performed at the anode. Accordingly, a supercapacitor having increased energy density can be effectively manufactured at lower cost than lithium ion capacitors, and also, the supercapacitor has high material stability and thus is not limited as to electrode configuration, and an electrode configuration that has a low manufacturing cost and is able to increase energy density and power density can be adopted.

An electrode for an energy storage device is disclosed. The electrode includes an active layer. The active layer includes a network of high aspect ratio carbon elements defining void spaces within the network, a plurality of electrode active material particles disposed in the void spaces within the network, and a polymeric additive, the polymeric additive being at least one of (i) selected from a family of polyamides, or (ii) a modified polyamide or derivative of a polyamide.

The present invention provides a thin film forming composition for energy storage device electrodes, said composition containing a conductive carbon material, a dispersant, a solvent and a polymer that has a partial structure represented by formula (P1) in a side chain. ##STR00001##
(In the formula, L represents —O— or —NH—; R represents an alkylene group having from 1 to 20 carbon atoms; T represents a substituted or unsubstituted amino group, a nitrogen-containing heteroaryl group having from 2 to 20 carbon atoms or a nitrogen-containing aliphatic heterocyclic group having from 2 to 20 carbon atoms; and * represents a bonding hand.)

A polymer compound, which is used as a binder for a negative electrode of an electricity storage device, is obtained by condensation of a vinyl polymer that contains a carboxyl group and a third compound that is selected from among an aromatic multifunctional amine, phosphorous acid, phosphorous acid ester, trialkoxysilane, and phosphoric acid.

A method for producing an electrically conductive paste, including a step of manufacturing paste A by exerting a cavitation effect in mixed liquid A containing multi-walled carbon nanotubes and a solvent, a step of manufacturing paste B from mixed liquid B containing carbon black particles, graphitized carbon nanofibers and a solvent, and a step of mixing paste A and paste B.

Various embodiments of binder compositions, electrodes incorporating the binder compositions, fabrication methods for the binder compositions, and energy storage devices having the electrodes are disclosed herein. In one embodiment, a binder composition includes an electrolyte solution that is ionically conductive, a polymeric material having a plurality of molecules mixed with the electrolyte solution, and a filler having a plurality of electrically conductive particles suspended in the adhesive matrix. The electrolyte solution plasticizing the polymeric material forming an adhesive matrix having the molecules of the polymeric material in an amorphous state.

Provided is a method for producing a binder composition for an electrochemical device that can sufficiently inhibit importation of contaminants into an electrochemical device when used in production of the electrochemical device. The method for producing a binder composition for an electrochemical device includes filling, into a container, a binder composition for an electrochemical device that contains a binder, wherein the container is a container made of a resin and shaped in a clean environment in which the number of particles of 0.5 μm in diameter is no greater than 100,000 particles per 1 ft.sup.3.

Composite particles for electrochemical device electrodes, which contain an electrode active material and a binder. A composite particle layer formed of the composite particles has a pressure loss of 5.0 mbar or less and a dynamic repose angle of 20° or more and less than 40°.