A nonaqueous electrolyte secondary battery is provided, which includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and negative electrode, and an electrolyte solution containing a supporting salt having ion conductivity, wherein the positive electrode comprises a composition containing components (a) and (b) below and satisfying a requirement () below, and wherein the negative electrode contains metal lithium and at least one selected from materials capable of lithium ion insertion/desorption: (a) an electrically conductive polymer; (b) a lithium salt formed by substituting a part of a polyanionic acid with lithium; and () a molar ratio of a lithium element content in the component (b) to a content of an element involved in a charge/discharge reaction in the component (a) is 0.1 to 1.0. Consequently, the nonaqueous electrolyte secondary battery has an excellent weight energy density and can reduce dependency on electrolyte solution amount.

The present invention relates to a positive electrode active material for a lithium-sulfur battery containing polyimide, more specifically, a positive electrode active material formed by complexing the composite of polyimide and carbon-based secondary particles with sulfur particles, a preparation method thereof and a lithium-sulfur battery comprising the same.

If the positive electrode active material formed by including and complexing the polyimide according to the present invention is applied to the lithium-sulfur battery, the elution of the polysulfide is suppressed, and thus lifetime characteristics and energy efficiency are improved.

Disclosed are a cross-linked compound particle and a secondary battery including the same. More particularly, a compound particle which includes a monomer and a polymerization initiator, as a core and a film including a material disappeared at predetermined temperature as a shell is provided.

The present disclosure provides the use of a biomolecule, flavin, appended to a polymerizable unit that can then be polymerized to form an electroactive active polymer. The polymer and the flavin unit are comprised of an organic material containing C, H, N, and O atoms. The electroactive functionality is related to the double bonds that are present in the flavin unit that are appended to a non-electroactive backbone. This appended unit is rendered insoluble in the electrolyte of the discussed secondary battery unit. Several different molecular structures are disclosed exhibiting efficacy as energy storage medium in energy storage devices. Compounds have also been synthesized from which these different energy storage molecular structures are produced.

A number of new classes of polymers with the potential for electrical conduction are introduced sharing a common theme, having metal atoms in direct contact with each other, bound in one and two-dimensional structures guided by steric, dipole and coordinating ligand factors. These new classes include a new family of metallole polymers in a polycyclic arrangement, both standing alone and with chains of metal atoms coordinated to their electronegative backbone atoms, new polymers of group 13 and 14 metals and metalloids, with substituents connected through an electronegative bonding atom, and a new class of close stacked porphyrin polymers, assembled with short molecular linkers perpendicular to the faces of the porphyrin units. These new materials empower new classes of capacitors, batteries and electrical conductors, even superconductors.

A fused-ring quinone-substituted polynorbornene has recurring units of formula (1) and/or (2) below. ##STR00001## In formulas (1) and (2), A.sup.1 is independently a substituent of formula (3) or (4) below, n is an integer from 1 to 6, and A.sup.2 is a substituent of formula (5) or (6) below. ##STR00002## In formulas (3) to (6), each X is independently a single bond or a divalent group, and Ar.sup.1 and Ar.sup.2 are each independently an aromatic hydrocarbon ring or an oxygen atom or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton. This polymer has charge-storing properties and, when used as an electrode active material, is capable of providing a high-performance battery possessing high capacity, high rate characteristics and high cycle characteristics.

An electrochemical device electrode includes a conductive polymer as an active material. The conductive polymer has a grain shape, and an intensity distribution pattern obtained by X-ray diffraction measurement with respect to the conductive polymer has a first peak in which a diffraction angle 2? ranges from 18? to 21?, inclusive, and a second peak in which a diffraction angle 2? ranges from 24? to 26?, inclusive.

The invention relates to an electrode material comprising at least one organic redox-active polymer, at least one conductive additive, and polyvinyl butyral as a binder. The electrode material according to the invention makes it possible to manufacture organic batteries having improved charging and discharging capacities. The invention also relates to electrodes comprising the electrode material as well as to batteries comprising the electrodes. The electrode material can also be used for printing electrodes.

A positive electrode active material, a method for preparation thereof and a positive electrode plate, a secondary battery and an electrical device containing the same are provided. The positive electrode active material has a core-shell structure, comprising a core, a first cladding layer covering the core, a second cladding layer covering the first cladding layer, wherein the core has a chemical formula of Li.sub.aA.sub.xMn.sub.1-yB.sub.yP.sub.1-zC.sub.zO.sub.4-nD.sub.n, the first cladding layer comprises a first polymer containing an electron withdrawing group, the second cladding layer comprises a second polymer, and wherein the second polymer comprises one or more of plant polysaccharides, marine polysaccharides and the derivatives thereof. The positive electrode active material of the present application enables a secondary battery to have a relatively high energy density, while further having a significantly improved rate performance, cycling performance and/or high-temperature stability.

The present invention provides for a composition of matter, polymeric conductive binder, or electrode comprising:

##STR00001##

Poly[(2-ethyldimethylammonioethyl methacrylate ethyl sulfate)-co-(1-vinylpyrrolidone)]. The present invention also provides for a Lithium-Sulfur (LiS) battery comprising a cathode comprising: a cathode comprising a polymeric conductive binder poly[(2-ethyldimethylammonioethyl methacrylate ethyl sulfate)-co-(1-vinylpyrrolidone)]; a separator; an anode; and, an electrolyte.