A method for preparing an ultrathin Li complex includes the steps of preparing an organic transition layer on a substrate in advance, and contacting the substrate having transition layer with molten Li in argon atmosphere with H.sub.2O≤0.1 ppm and O.sub.2≤0.1 ppm. The molten Li spreads rapidly on the surface of the substrate to form a lithium thin layer. The ultrathin Li layer stores lithium on the current collector beforehand. It can be used as a safe lithium anode to inhibit dendrites.

Disclosed is a carbon-based fiber sheet and a lithium-sulfur battery including the same. The carbon-based fiber sheet for the lithium-sulfur battery is doped with a high concentration of nitrogen and thus plays a role of preventing diffusion by adsorbing lithium polysulfide eluted from a positive electrode during charging and discharging, thereby suppressing a shuttle reaction and thus improving capacity and lifecycle properties of the lithium-sulfur battery.

A free-standing electrically conductive porous structure suitable to be used as a cathode of a battery, including an electrically conductive porous substrate with sulfur diffused into the electrically conductive porous substrate to create a substantially uniform layer of sulfur on a surface of the electrically conductive porous substrate. The free-standing electrically conductive porous structure has a high performance when used in a rechargeable battery. A method of manufacturing the electrically conductive porous structure is also provided.

Disclosed is an electrode for a lead acid battery formed of an electrode plate having a first side and a second opposing the first side, an active material paste applied to at least one of the first and second sides and a fiber mat embedded in the active material paste.

Disclosed are an electrode having a three-dimensional structure, the electrode including: a porous nonwoven web including a plurality of polymer fibers that form an interconnected porous network; an active material composite positioned among the polymer fibers and including active material particles and a first conductive material; and a second conductive material positioned on an outer surface of the active material composite, wherein the interconnected porous network is filled homogeneously with the active material composite and the second conductive material to form a super lattice structure, and an electrochemical device including the electrode having a three-dimensional structure.

A molten sodium-based battery comprises a robust, highly Na-ion conductive, zero-crossover separator and a fully inorganic, fully liquid, highly cyclable molten cathode that operates at low temperatures.

The present invention relates to an electrode assembly, a battery including the electrode assembly, and a method of manufacturing the same. A method of manufacturing an electrode assembly according to an embodiment of the present invention includes: a step for providing a separator; a step for forming a first conductive network layer comprising at least more than one first metal fibers on a first peripheral surface of the separator; and a step for providing a first particle composition comprising the electrically active material of the first polarity in the pores of the first conductive network layer.

A free-standing electrically conductive porous structure suitable to be used as a cathode of a battery, including an electrically conductive porous substrate with sulfur diffused into the electrically conductive porous substrate to create a substantially uniform layer of sulfur on a surface of the electrically conductive porous substrate. The free-standing electrically conductive porous structure has a high performance when used in a rechargeable battery. A method of manufacturing the electrically conductive porous structure is also provided.

A method of making a stretchable composite electrode is provided. An elastic substrate is pre-stretched along a first direction and a second direction, to obtain a pre-stretched elastic substrate. A carbon nanotube active material composite layer is laid on a surface of the pre-stretched elastic substrate. And the pre-stretching of the elastic substrate is removed, and a plurality of wrinkles is formed on a surface of the carbon nanotube active material composite layer.

There is provided a positive electrode active material composite for a lithium-ion secondary battery, in which, when using as a positive electrode active material of the lithium-ion secondary battery, it can effectively improve high-temperature cycle characteristics. In the positive electrode active material composite for a lithium-ion secondary battery, only on the surface of a lithium transition metal oxide secondary particle (A) composed of one or more of the lithium transition metal oxide particles represented by the following formula (I): LiNi.sub.aCo.sub.bMn.sub.cM.sup.1.sub.xO.sub.2 . . . (I) or the following formula (II): LiNi.sub.dCO.sub.eAl.sub.fM.sup.2.sub.yO.sub.2 . . . (II), a lithium-based polyanion particles (B) is composited with lithium transition metal oxide particles under a specific condition, the lithium-based polyanion particles (B) being represented by the following formula (III) or (III): Li.sub.gMn.sub.hFe.sub.iM.sup.3.sub.zPO.sub.4 . . . (III) or Mn.sub.hFe.sub.iM.sup.3.sub.zPO.sub.4 . . . (III) and being supporting carbon (C) on a surface thereof.