The present application discloses a positive electrode current collector, a positive electrode plate, an electrochemical device, and an apparatus. The positive electrode current collector includes a polymer material-based support layer and an aluminum-based conductive layer disposed on at least one surface of the support layer; a thickness D.sub.1 of the aluminum-based conductive layer, a tensile strength T of the support layer, and a thickness D.sub.2 of the support layer satisfy a relational formula 0.01≤(200×D.sub.1)/(T×D.sub.2)≤0.5, in the formula D.sub.1 and D.sub.2 are in the same unit, and T is in MPa. The positive electrode current collector has relatively high mechanics and mechanical properties, good electrical conductivity and current collection performance and low weight, which can improve preparation yield of the positive electrode current collector, the positive electrode plate and the electrochemical device and their reliability during use.

A composite current collector includes a base body, a first connecting layer and a first conductive layer, the first connecting layer bonds the first conductive layer to a first surface of the base body; a first passivation layer is formed on one surface of the first conductive layer facing toward the first connecting layer. the first passivation layer may prevent an electrolyte from contacting the first conductive layer and causing the first conductive layer to be corroded and damaged when the electrolyte enters from one surface of the first connecting layer facing away from the first conductive layer, thereby improving the stability of the current collector; an electrode plate and an electrochemical device are provide.

An anode for a lithium metal battery includes a host structure configured to be between an anode current collector and a separator, the host structure having void spaces configured to host metallic lithium during charging, wherein the host structure has a void space of ≥60% and ≤80%. Another anode for a lithium metal battery includes a current collector, a separator, and a host structure between the current collector and the separator, the host structure having void spaces configured to host metallic lithium during charging, wherein the host structure is formed of fibers.

Compositions and methods for the fabrication of electrode and porous lithium-garnet electrolyte scaffolds for use in solid state batteries and other devices are provided. The methods produce porous structures using phase inversion or high shear compaction processes to fabricate a solid-state battery electrode material from LLZO electrolytes. Engineered electrode structures with a porous scaffold of solid electrolyte material provide lower interfacial resistances and a mechanical support for a thin solid electrode layer improving performance.

Electrochemical cells of the present disclosure may include one or more multilayered electrodes. One or both multilayered electrodes may be configured such that a second layer farther from the current collector has a higher resistance to densification than a first layer closer to the current collector. This may be achieved by including a plurality of non-active ceramic particles in the second layer. Accordingly, calendering of the electrode results in a greater compression of the first layer, and a beneficial porosity profile is created. This may improve the ionic conductivity of the electrode, as compared with known systems.

An electrochemical cell is provided which includes a cathode, an anode, an electrolyte separator, and an anode current collector located on the anode. The anode is a three-dimensional (3D) porous anode including ionically conducting electrolyte strands and pores which extend through the anode from the anode current collector to the electrolyte separator. The anode also includes electronically conducting networks extending on sidewall surfaces of the pores from the anode current collector to the electrolyte separator.

A nonaqueous electrolyte rechargeable battery includes a positive electrode plate, a negative electrode plate, a separator, and a nonaqueous electrolyte. The positive electrode plate includes a positive electrode current collector, a positive electrode mixture layer including positive electrode active material particles and a conductor, and an insulative protection layer including insulative particles and a binder. In the insulative protection layer, a value of (the insulative particles)/(the insulative particles+the binder) is between 75 wt % and 85 wt %, inclusive. A single-surface thickness T.sub.I of the insulative protection layer is between 3.0 μm and 15 μm, inclusive. A porosity P.sub.I of the insulative protection layer is between 42% and 55%, inclusive. A ratio of the single-surface thickness T.sub.I to a single-surface thickness T.sub.P of the positive electrode mixture layer is between 0.12 and 0.80, inclusive.

An assembly of lithium-based solid anodes to be formed into a lithium-ion battery. The anodes are formed with a fibrous ceramic or polymer framework having open spaces and an active surface material having lithiophilic properties. Open spaces within the fibrous framework and lithiophilic coatings deposited upon the surface of the fibrous framework allow for the free transport of solid lithium-ions within the anodes. In solid-state, lithium batteries can achieve higher capacity per weight, charge faster, and be more durable to extreme handling and temperature. A method for manufacturing a solid-state lithium battery having such an anode.

This slurry for secondary batteries includes inorganic particles, a binding material, and a dispersion medium. The inorganic particles are formed from a metal compound, including as main components, an alkali metal and a metal other than alkaline earth metals, the contained amount of the alkali metal being 0.001-2 mass %. A positive electrode according to an embodiment of the present invention is provided with a collector, an intermediate layer formed on at least one surface of the collector, and a mixture layer formed on the intermediate layer. The intermediate layer includes the inorganic particles, a binding material, and a conductive material.

A positive electrode for a secondary battery which is an example of the embodiment of the present invention comprises a collector, a protective layer formed on at least one surface of the collector, and a composite material layer formed on the protective layer. The protective layer has a first region and a second region. The first region includes inorganic particles and a conductive material. The second region includes inorganic particles and substantially does not include a conductive material, or includes inorganic particles and a conductive material, the content of the conductive material being less than the content of the conductive material in the first region.