The present invention provides an anode active material and a method for preparing the same, wherein the anode active material has a core-shell structure having formula (MOx-Liy)-C (here, M is a metal (or metalloid), x is greater than 0 and less than 1.5, and y is greater than 0 and less than 4) and including a core part containing an alloy of a metal (or metalloid) oxide-Li (MOx-Liy) and a shell part containing a carbon material coated on a surface of the core part, wherein the shell part contains lithium in an amount less than 5 atm % in the surface and the inner portion thereof. The anode active material can provide high capacity, excellent cycle characteristics, excellent volume expansion control capability, and high initial efficiency.

An all-solid-state battery cell has a cathode on which a cathode current collector is attached, a solid electrolyte deposited on the cathode opposite the cathode current collector, an anode comprising lithium deposited onto the solid electrolyte opposite the cathode, and an anode current collector bonded to the anode opposite the solid electrolyte with a bonding layer of a metal alloyed with the lithium.

A main object of the present disclosure is to provide an anode active material whose volume variation due to charging and discharging is small. The present disclosure achieves the object by providing an anode active material comprising a primary particle including a Si phase, an MSi phase that is a silicide phase wherein M is a transition metal element, and a first void.

Electrochemical cells operating with molten electrodes and electrolyte, where the cathode is an alloy of a metal and metalloid, may be assembled in a discharged state by combining first an anodic metal with a cathodic metal to form a binary alloy. This binary alloy is then placed in a cell housing with the metalloid and the electrolyte, all in the solid state. The temperature is raised to, and maintained at, a temperature above the melting point of the highest melting component until components assembled into horizontal layers of electrolyte above a layer of a ternary alloy formed by the combination of the binary alloy and the metalloid. A charge and discharged cycle is then run through the electrochemical cell.

A hydrogen storing alloy containing only a few impurities leading to a short circuit where the yield can be maintained even when the alloy is subjected to magnetic separation treatment. A hydrogen storing alloy includes a matrix phase having an AB5 type crystal structure, the alloy having a misch metal (referred to as “Mm”) in an A-site in an ABx composition and having any one or at least one of Ni, Al, Mn, and Co in a B-site in the ABx composition, wherein the ratio (referred to as “ABx”) of the total number of moles of elements comprising the B site to the total number of moles of elements comprising the A site is 5.00<ABx≦5.40; the content of Co is more than 0.0 mol % and less than 0.7 mol %; and residual magnetization is more than 0 emu/g and 0.020 emu/g or less.

A method and system for forming lithium anode devices are provided. In one embodiment, the methods and systems form pre-lithiated Group-IV alloy-type nanoparticles (NP's), for example, Li—Z where Z is Ge, Si, or Sn. In another embodiment, the methods and systems synthesize Group-IV nanoparticles and alloy the Group-IV nanoparticles with lithium. The Group-IV nanoparticles can be made on demand and premixed with anode materials or coated on anode materials. In yet another embodiment, the methods and systems form lithium metal-free silver carbon (“Ag—C”) nanocomposites (NC's). In yet another embodiment, a method utilizing silver (PVD) and carbon (PECVD) co-deposition to make anode coatings that can regulate lithium nucleation energy to minimize dendrite formation is provided.

The present invention relates to a negative electrode for the use in alkali-ion rechargeable battery where electrochemically active material is selected from the Group IV semiconductors, the active material forming a heterofibrous monolithic anode body, the anode body comprises at least of 2 layers of aligned and/or stacked and/or interlaced fibers wherein the layers of fibers are spot-fused together at points of their physical contact and further over-lithiated by ex-situ anisotropic chemical and or electrochemical means forming a monolithic wafer-like self-standing over-lithiated alloying type anode where part of the lithium excess is subsequently depleted during forming artificial SEI-layer.

Disclosed herein are multiphase metal anodes useful in non-aqueous batteries. The anodes include at least one active metal and at least one conductive metal.

Metal alloy layers on substrates. The metal-alloy layers (e.g., lithium-metal layers, sodium-metal layers, and magnesium-metal layers) can be disposed on, for example, a solid-state electrolyte material. The metal-alloy layers can be used in, for example, solid-state batteries. A metal alloy layer can be an anode or part of an anode of a solid state battery.

A main object of the present disclosure is to provide an anode active material whose volume variation due to charging and discharging is small. The present disclosure achieves the object by providing an anode active material comprising a primary particle including a Si phase, an MSi phase that is a silicide phase wherein M is a transition metal element, and a first void.