A main object of the present disclosure is to provide an all solid state battery wherein interface resistance between a current collector and an active material layer is low. In the present disclosure, the above object is achieved by providing an all solid state battery comprising: an electrode including a current collector, an electron conductive layer, and an active material layer, in this order, and a solid electrolyte layer formed on the active material layer side of the electrode, and the electron conductive layer is an agglutinate of metal particles or a metal foil, and electron conductivity of the electron conductive layer is 1×10.sup.3 S/cm or more at 25° C.

A power storage system includes a power storage element; and a voltage detecting unit configured to detect an output voltage of the power storage element. The power storage element and the voltage detecting unit are formed by integrally forming structural materials of the power storage element and the voltage detecting unit on the same base material, without any point bonding portions formed by solder mounting.

This disclosure provides a battery comprising a cathode and an anode positioned opposite the cathode. A hybrid artificial solid-electrolyte interphase (A-SEI) layer is deposited on the anode and includes a plurality of active components. A blended material is interwoven throughout the plurality of active components and configured to inhibit growth of Lithium (Li) dendritic structures from the anode to the cathode. The blended material includes a combination of crystalline sp.sup.2-bound carbon domains of graphene sheets and a plurality of flexible wrinkle areas positioned at joinder points of two of more of the crystalline sp.sup.2-bound carbon domains of graphene sheets and a polymeric matrix configured to bind the plurality of active components and the blended material together. An electrolyte is in contact with the hybrid A-SEI and the cathode and a separator is positioned between the anode and the cathode. The blended material includes curable carboxylate salts of metals.

The invention comprises an anode-free lithium metal cell having an anode-side current collector composed of lithium, a lithium alloy or lithium-containing compound or a transition metal having a lithium or lithium alloy or lithium-containing compound surface coating, to provide a specific energy of the cell of 350 Wh/kg or greater.

An electrochemical cell and a method of preparing the electrochemical cell are provided. The electrochemical cell, such as a lithium battery or a solid-state lithium ion battery, includes a first electrode having a solid polymer electrolyte deposited thereon, wherein the solid polymer electrolyte comprises a microporous polymer swollen with an organic carbonate liquid and a dissociable lithium salt, and a second electrode. The method of preparing an electrochemical cell includes providing the first electrode, immersing the first electrode in an electrolyte solution, depositing the solid polymer electrolyte on the immersed first electrode, and attaching the second electrode to an exposed surface of the solid polymer electrolyte, thereby forming the electrochemical cell. During operation, the solid polymer electrolyte is capable of growing a passivating polymer layer at an interface between the first electrode and the solid polymer electrolyte.

A solid electrolyte layer having a solid electrolyte and carbon, in which a dispersion degree (CV value) of the carbon measured by a quadrat method in a cross section of the solid electrolyte layer is more than zero and less than one.

An active material includes a core portion, and a coating portion arranged on a surface of the core portion. The core portion contains elemental lithium (Li), elemental manganese (Mn), and elemental oxygen (O). The coating portion contains an element A (A is at least one selected from the group consisting of Ti, Zr, Ta, Nb, and Al) and elemental oxygen (O). W/(T×S) is more than 0 and 15% by mass/(cm.sup.3/g) or less, wherein T (nm) represents an average thickness of the coating portion, S (m.sup.2/g) represents a specific surface area of the active material, and W (% by mass) represents an amount of element A contained in the coating portion.

Embodiments relate to a method for fabricating a sintered sodium-ion material. The method involves mixing a parent phase sodium-ion compound with a secondary transient phase to form a powder mixture. The method involves applying pressure and heat above a melting point or boiling point of the secondary transient phase to drive dissolution at particle contacts and subsequent precipitation at newly formed grain boundaries. The method involves generating a sintered sodium-ion material with >90% relative density.

Provide is a solid-state battery capable of reducing the lamination space factor of a solid electrolyte and reducing electrical resistivity. A solid-state battery includes: a laminate including a positive electrode plate and a negative electrode plate that are alternately laminated; and a solid electrolyte layer formed on at least one of a lamination surface of the positive electrode plate and a lamination surface of the negative electrode plate.

Provided is a solid-state battery having a bipolar electrode plate and capable of reducing the lamination space factor of a solid electrolyte and reducing electrical resistivity. The solid-state battery includes: a laminate including a positive electrode plate, at least one bipolar electrode plate, and a negative electrode plate that are laminated; and a solid electrolyte layer formed on a lamination surface of the at least bipolar electrode plate.