An electrode plate includes a current collector, a first active substance layer, a second active substance layer, and an insulation layer. The current collector includes a first surface, the first active substance layer includes a first active substance, and the second active substance layer includes a second active substance. The first active substance layer is sandwiched between the current collector and the second active substance layer and covers a first portion of the first surface, the insulation layer covers a second portion of the first surface, and the first active substance layer and the insulation layer are stacked to form an overlapped portion in a length direction of the electrode plate. The current collector can be covered by a high-resistance layer, thereby improving safety performance of the electrochemical apparatus and the electronic apparatus.

A negative electrode plate includes: a current collector; and a negative electrode framework located on the current collector, where the negative electrode framework includes at least a first negative electrode framework layer and a second negative electrode framework layer, the first negative electrode framework layer is located between the current collector and the second negative electrode framework layer, and a porosity of the first negative electrode framework layer is higher than a porosity of the second negative electrode framework layer. With this design, side reactions between lithium metal and an electrolyte can be reduced, formation of lithium dendrites can be inhibited, and drastic swelling and contraction of the negative electrode plate in volume due to intercalation and deintercalation of lithium ions can be greatly alleviated or even eliminated, thereby improving safety and stability of the electrochemical apparatus.

A negative electrode plate includes: a current collector; and a negative electrode framework located on the current collector, where the negative electrode framework includes at least a first negative electrode framework layer and a second negative electrode framework layer, the first negative electrode framework layer is located between the current collector and the second negative electrode framework layer, and a porosity of the first negative electrode framework layer is higher than a porosity of the second negative electrode framework layer. With this design, side reactions between lithium metal and an electrolyte can be reduced, formation of lithium dendrites can be inhibited, and drastic swelling and contraction of the negative electrode plate in volume due to intercalation and deintercalation of lithium ions can be greatly alleviated or even eliminated, thereby improving safety and stability of the electrochemical apparatus.

A negative electrode for lithium secondary batteries and a method of manufacturing the same are provided. The negative electrode includes a negative electrode current collector and a lithiophilic material formed on at least one surface of the negative electrode current collector, wherein the lithiophilic material is an oxidized product of a coating material coated on the negative electrode current collector and includes at least one of a metal or a metal oxide, and an oxide layer is formed on a surface of the negative electrode current collector having the lithiophilic material formed thereon.

A negative electrode for lithium secondary batteries is provided. The negative electrode comprises a negative electrode current collector including a porous structure having an inner pore or a through-hole formed therethrough from an upper surface to a lower surface thereof, wherein a lithiophilic material is applied to a surface of the porous structure or the through-hole excluding a first surface of the negative electrode current collector that faces a positive electrode.

An electrochemical device includes a negative electrode plate including a negative current collector provided with a negative active material layer and a positive electrode plate including a positive current collector provided with a positive active material layer. The positive active material layer includes a first region. The first region includes a second region and a third region that does not overlap the second region by any area. A first insulation layer is disposed on a surface of the second region. The negative active material layer includes a fourth region facing towards the third region. An area S2 mm.sup.2 of the second region and an area S1 mm.sup.2 of the first region satisfy: S2<S1≤1.5S2, and a ratio CB of a unit-area capacity of the fourth region to a unit-area capacity of the third region is greater than or equal to 1.1.

An electrochemical device includes a negative electrode plate including a negative current collector provided with a negative active material layer and a positive electrode plate including a positive current collector provided with a positive active material layer. The positive active material layer includes a first region. The first region includes a second region and a third region that does not overlap the second region by any area. A first insulation layer is disposed on a surface of the second region. The negative active material layer includes a fourth region facing towards the third region. An area S2 mm.sup.2 of the second region and an area S1 mm.sup.2 of the first region satisfy: S2<S1≤1.5S2, and a ratio CB of a unit-area capacity of the fourth region to a unit-area capacity of the third region is greater than or equal to 1.1.

A positive electrode material in one aspect of the present disclosure includes: a positive electrode active material; and a first solid electrolyte that covers the surface of the positive electrode active material. The first solid electrolyte contains Li, M1, O, and X1. M1 is at least one element selected from the group consisting of Nb and Ta. X1 is at least one element selected from the group consisting of Cl, Br, and I.

A positive electrode comprising a current collector and a positive electrode active material layer disposed on at least one surface of the current collector, and a lithium-sulfur battery comprising the positive electrode are provided. The positive electrode active material layer comprises a positive electrode active material and an additive, and the additive comprises a transition metal-ferrocyanide compound.

A method for manufacturing an electrode for an all solid battery including the steps of coating a current collector with a slurry including an active material, a conductive material, and a polyimide-based binder; and melting a solid electrolyte having a melting temperature of 50° C. to 500° C. and applying it onto the coating layer and an electrode manufactured therefrom.