A composite negative electrode based on pure metallic lithium, pure metallic sodium or one of their alloys and a polymer membrane, a method for manufacturing such an electrode, as well as an electrical energy storage system, in particular an electrochemical accumulator such as a secondary (rechargeable) lithium or sodium battery comprising at least one such negative electrode. It is particularly applicable to Lithium-Metal-Polymer or LMP™ batteries.

The present disclosure describes various types of batteries, including lithium-ion batteries having an anode assembly comprising: an anode comprising a first porous ceramic matrix having pores; and a ceramic separator layer affixed directly or indirectly to the anode; a cathode; an anode-side current collector contacting the anode; and anode active material comprising lithium located within the pores or cathode active material located within the cathode; wherein, the ceramic separator layer is located between the anode and the cathode, no electrically conductive coating on the pores contacts the separator layer, and in a fully charged state, lithium active material in the anode does not contact the separator layer. Also disclosed are methods of making and methods of using such batteries.

Systems and methods for a lithium-ion battery cell are disclosed. In one example, a method for forming a cathode for a lithium-ion battery cell includes forming a pre-lithiated cathode with a pre-lithiation reagent and positioning the pre-lithiated cathode in contact with an electrolyte. An electrolyte additive is injected into the electrolyte to form a passivation layer at the pre-lithiated cathode, the passivation layer inhibiting continued decomposition of the pre-lithiation reagent of the pre-lithiated cathode after completion of a formation cycle of the lithium-ion battery cell.

A solid electrolyte (10) of the present disclosure includes porous silica (11) having a plurality of pores (12) interconnected mutually and an electrolyte (13) coating inner surfaces of the plurality of pores (12). The electrolyte (13) includes 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide represented by EMI-TFSI and a lithium salt dissolved in the EMI-TFSI. A molar ratio of the EMI-TFSI to the porous silica (11) is larger than 1.5 and less than 2.0.

A negative electrode for a lithium secondary battery, a method for preparing a negative electrode for a lithium secondary battery, and a lithium secondary battery including the negative electrode. The negative electrode for a lithium secondary battery includes a negative electrode current collector layer, a first negative electrode active material layer on one surface or both surfaces of the negative electrode current collector layer, and a second negative electrode active material layer on a surface opposite to a surface of the first negative electrode

The present invention provides a lithium metal battery having a lithium metal electrode including a cathode, an anode, a separator positioned between the cathode and the anode, an electrolyte, and a lithium metal negative electrode. The lithium metal negative electrode includes a lithium reactive metal layer, the lithium reactive metal layer being formed on a support conductive layer. A dendrite-suppressing coating is formed over the lithium reactive metal layer; the dendrite-suppressing coating is a displacement-reacted metal including silver reacted from decomposition of a silver salt and having an interface reaction product formed from a reaction between the silver salt and the lithium reactive metal layer. The interface reaction product is positioned between the displacement-reacted metal layer and the lithium reactive metal layer. The dendrite suppressing coating permits lithium metal ions to permeate the coating to react electrolytically in an overall battery reaction.

A positive electrode slurry composition of the present application may comprise a positive electrode active material, a lithium-supplementing agent and a binder, wherein the positive electrode active material may include a lithium-containing phosphate represented by formula (I),

LiFe.sub.1-b1-c1Mn.sub.b1M.sup.1.sub.c1PO.sub.4   formula (I) in which 0≤b1≤1, 0≤c1≤0.1, and M.sup.1 is selected from at least one of transition metal elements and non-transition metal elements in addition to Fe and Mn; the lithium-supplementing agent may be selected from one or more of lithium metal oxides of Li.sub.a1M.sup.2O.sub.0.5(2+a1), Li.sub.2M.sup.3O.sub.3, Li.sub.2M.sup.4O.sub.4, Li.sub.3M.sup.5O.sub.4, Li.sub.5M.sup.6O.sub.4, and Li.sub.5M.sup.7O.sub.6, and the binder may be represented by formula (II):

##STR00001## in which R.sub.1 and R.sub.2 are independently H or F, x, y, and z are all positive integers, and 0.52≤(4x+3y+2z)/(4x+4y+4z)≤0.7.

Provided is a positive electrode for a lithium-sulfur secondary battery comprising a positive electrode active material, an electrically conductive material, a binder, and a multivalent metal salt. The multivalent metal salt comprises a cation of a metal selected from a group consisting of metals having 3 to 6 of an effective nuclear charge of outermost electrons in the 3rd and 4th periods. The positive electrode for the lithium-sulfur secondary battery can improve the performance of the lithium-sulfur secondary battery by introducing a multivalent metal salt and thus effectively inhibiting the leaching of lithium polysulfide when applied to the battery while not significantly increasing the weight of the electrode and not significantly lowering the conductivity of the electrode.

An electrode material manufacturing method is a method for manufacturing an electrode material (50) of an all-solid-state battery, and the method includes: the step of preparing a coated active substance to prepare a coated active substance (10) containing a positive electrode active substance 11 and a coating layer (12) of an oxide-based solid-electrolyte that covers at least a portion of a surface thereof; the step of first compositing to manufacture a first composite material (20) by covering at least a portion of a surface of the solid electrolyte (21) with a conductive auxiliary agent (22); the step of second compositing to manufacture a second composite material (40) by covering a surface of the coated active substance (10) with the first composite material (20); and the step of mixing the second composite material (40), the conductive auxiliary agent (22), and the solid electrolyte (21) to manufacture an electrode material (50).

Batteries, coating materials and methods for cathode active materials, composition of cathode electrode sheets are disclosed. The battery includes a cathode selected from the group consisting of a nickel-rich material and an iron phosphate material and an ionic-electronic conducting polymeric coating on the cathode.