The present invention relates to an additive for an electrochemical device positive electrode comprising a porous carbon material, wherein the porous carbon material has a pore volume of pores having a diameter of 2 nm or more of 0.25 cm.sup.3/g or more, a pore volume of pores having a diameter of less than 2 nm of 0.5 cm.sup.3/g or less, and an ash content of 0.5% by weight or less.

The present application is generally directed to composites comprising a hard carbon material and an electrochemical modifier. The composite materials find utility in any number of electrical devices, for example, in lithium ion batteries. Methods for making the disclosed composite materials are also disclosed.

The present application is generally directed to composites comprising a hard carbon material and an electrochemical modifier. The composite materials find utility in any number of electrical devices, for example, in lithium ion batteries. Methods for making the disclosed composite materials are also disclosed.

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

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

An electrolyte is introduced into an electrochemical device, passed, via a first corrugation feature, through a first electrode of the electrochemical device, passed through an ion permeable separator, and contacted with a second electrode. The first or second electrode comprises a second corrugation feature in fluid communication with the first corrugation feature to contact the electrolyte across a portion of an active surface of the first or second electrode.

An electrolyte is introduced into an electrochemical device, passed, via a first corrugation feature, through a first electrode of the electrochemical device, passed through an ion permeable separator, and contacted with a second electrode. The first or second electrode comprises a second corrugation feature in fluid communication with the first corrugation feature to contact the electrolyte across a portion of an active surface of the first or second electrode.

An interfacial protective coating layer of LTO is effective in preventing unwanted interfacial reactions between the solid-state electrolyte and cathode electrodes from occurring. Incorporation of the inventive coating into sodium-based all-solid-state batteries allows for room temperature operation, high voltage, and long cycle life.

A positive electrode for an energy storage device according to one aspect of the present invention includes a positive active material layer containing a positive active material and a carbon nanotube, in which in a Log differential pore volume distribution of the positive active material layer measured by a mercury intrusion method, an average value of a ratio of a Log differential pore volume to a pore diameter in a range of a pore diameter of 20 nm or more and 200 nm or less is 3000 cm.sup.2/g or more.

An anode material including a metal oxide-conductive inorganic material complex including a metal oxide and a conductive inorganic material bound to the metal oxide, wherein the complex is doped with one or more doping elements selected from the group consisting of transition metals and amphoteric metal elements, and a preparation method thereof, are provided.