An anode electrode for an energy storage device includes both an ion intercalation material and a pseudocapacitive material. The ion intercalation material may be a NASICON material, such as NaTi.sub.2(PO.sub.4).sub.3 and the pseudocapacitive material may be an activated carbon material. The energy storage device also includes a cathode, an electrolyte and a separator.

An anode electrode for an energy storage device includes both an ion intercalation material and a pseudocapacitive material. The ion intercalation material may be a NASICON material, such as NaTi.sub.2(PO.sub.4).sub.3 and the pseudocapacitive material may be an activated carbon material. The energy storage device also includes a cathode, an electrolyte and a separator.

A method for producing composite particles for an electrochemical device electrode is provided. The composite particles include an electrode active material and 0.1 to 10 parts by weight of a binder relative to 100 parts by weight of the electrode active material based on a dry weight, the binder having a glass transition temperature of −30 to 30° C. Tha method comprises a step of adjusting a cumulative 10% diameter (D10 diameter) of the composite particles to 20 μm or more and 100 μm or less in a particle diameter distribution in terms of a volume. The composite particles as a powder have a pressure loss of 5.0 mbar or less and a dynamic repose angle of 20° or more and less than 40°.

A method for producing composite particles for an electrochemical device electrode is provided. The composite particles include an electrode active material and 0.1 to 10 parts by weight of a binder relative to 100 parts by weight of the electrode active material based on a dry weight, the binder having a glass transition temperature of −30 to 30° C. Tha method comprises a step of adjusting a cumulative 10% diameter (D10 diameter) of the composite particles to 20 μm or more and 100 μm or less in a particle diameter distribution in terms of a volume. The composite particles as a powder have a pressure loss of 5.0 mbar or less and a dynamic repose angle of 20° or more and less than 40°.

Electrolytes and electrolyte additives for energy storage devices comprising linear carbonate compounds.

Electrolytes and electrolyte additives for energy storage devices comprising linear carbonate compounds.

One aspect of the present invention is an energy storage device including a negative electrode including a negative electrode substrate and a negative active material layer stacked directly or indirectly on at least one surface of the negative electrode substrate, the negative active material layer containing a negative active material, the negative active material containing hollow graphite particles having a median diameter D1 and solid graphite particles having a median diameter D2 smaller than the median diameter of the hollow graphite particles.

A predoping method for a negative electrode active material to dope the negative electrode active material with lithium ions. The predoping method for a negative electrode active material includes: a predoping process and a post-doping modification process. In the predoping process, the negative electrode active material is doped with lithium ions, to thereby reduce a potential of the negative electrode active material relative to lithium metal. In the post-doping modification process, after the predoping process, reaction is caused between a reactive compound that is reactive with lithium ions and lithium ions doped into the negative electrode active material, to thereby increase the potential of the negative electrode active material relative to lithium metal. The potential of the negative electrode active material relative to lithium metal is 0.8 V or more at completion of the post-doping modification process.

The present invention relates to an electrode comprising at least one metal foil and at least two layers each comprising at least one lithium ion acceptor.

The present invention relates to an electrode comprising at least one metal foil and at least two layers each comprising at least one lithium ion acceptor.