A silicon-polymer composite anode having two or more different molecular weight (MW) versions of the same polymer, method of making the anode and electrochemical energy storage device containing the anode are disclosed.

An apparatus for manufacturing a lithium-ion secondary cell negative-electrode carbon material by heat-treating carbon particles while causing the carbon particles to flow within a heat-treatment furnace, the apparatus having a heat-treatment furnace provided with a carbon-particle supply opening for supplying the carbon particles into the interior, and a negative-electrode carbon material recovery opening for taking out the negative-electrode carbon material from the interior and a cooling tank connected in an airtight manner to the negative-electrode carbon material recovery opening of the heat-treatment furnace, and provided with a cooling means.

Disclosed is an electrode. An electrode according to the present invention includes an active material layer; and a current collector which includes a plurality of conductive filaments, wherein at least one from among the plurality of conductive filaments is embedded in the active material layer so that a set length is exposed from the surface thereof.

A composition includes a silicon nanoparticle having surface-attached groups, and the silicon nanoparticle is represented by the formula:
[Si]-[linker]-[terminal group].
In the formula [Si] represents the surface of the silicon nanoparticle; [terminal group] is a moiety that is configured for further reaction or is compatible with the electrolyte; and [linker] is a group linking the surface of the silicon nanoparticle to the [terminal group].

Provided is an electrode, including: a collector; and an active material layer formed on the collector, wherein the active material layer contains sulfur-modified polyacrylonitrile and a lithium-titanium oxide, wherein an average secondary particle diameter of the sulfur-modified polyacrylonitrile is larger than an average secondary particle diameter of the lithium-titanium oxide, and wherein a content of the sulfur-modified polyacrylonitrile in the active material layer is from 5 mass % to 85 mass %, and a content of the lithium-titanium oxide in the active material layer is from 5 mass % to 85 mass %.

The present invention provides a sulfur-modified polyacrylonitrile having a total content of sulfur of from 30 mass % to 55 mass % and having a content of free sulfur of from 0.05 ppm by mass to 4 mass % determined by a solvent extraction method, an electrode active material containing the same, an electrode for a secondary battery including the electrode active material, a method of manufacturing the electrode, and a non-aqueous electrolyte secondary battery using the electrode.

Polymer derived ceramic (PDC) materials, compositions and methods of making high capacity, long cycle, long life battery anodes to improve the performance of batteries of all types, including but not limited to coin cell batteries, electric vehicle (EV) batteries, hybrid electric vehicle (HEV) batteries, plug-in hybrid electric vehicle (PHEV) batteries, battery electric vehicle (BEV) batteries, lithium cobalt (LCO) batteries, lithium iron (LFP) batteries; and lithium-ion (Li) batteries, and lead acid batteries. Silicon is incorporated in the PDC material at a molecular level when reacting a polymer derived ceramic precursor and a silicon hydride constituent or a silicon alkoxide constituent to form a PDC composition useful as a powdered battery anode material. A predetermined amount of divinylbenzene is added as a crosslinker and a modifier to increase free carbon content. The resulting battery anode materials increase the specific capacity of a battery measured in milliampere-hours per gram (mAh/g) and increase the life cycle of a battery while minimizing distortion and stress of the anode structure.

Disclosed herein is a composite electrode comprising a charge-conducting material, a charge-providing material bound to the charge-conducting material, and a plurality of single-walled carbon nanotubes bound to a surface of the charge-providing material. High-capacity electroactive materials that assure high performance are a prerequisite for ubiquitous adoption of technologies that require high energy/power density lithium (Li)-ion batteries, such as smart Internet of Things (IoT) devices and electric vehicles (EVs). Improved electrode performance and lifetimes are desirable. The disclosed electrode can have a Coulombic efficiency of 99% or greater, and a stable capacity retention after 100 cycles or more. Also disclosed herein are methods of making a composite electrode.

The present disclosure relates to a cathode active material for a secondary battery, comprising a poly(S-co-VPA) vulcanized polymer, a preparation method thereof, and a lithium-sulfur secondary battery comprising the same.

An electropositive metal electrode coated by an ion-selective conformable polymer provides the negative electrode and the solid-state electrolyte for a rechargeable bi-electrolyte displacement battery that further includes a molten salt electrolyte having a melting temperature below 140° C. interposed between the conformable polymer coating and a positive electrode. Suitable electropositive metals include lithium, sodium, magnesium, and aluminum and the molten salt incorporates a soluble salt of the metal of the negative electrode. Positive electrodes may incorporate metals including Fe, Ni, Bi, Pb, Zn, Sn, and Cu, and thanks to the ion-selective conformable solid-state electrolyte the molten salt is able to incorporate a soluble salt of the metal of the positive electrode. The conformable polymer-coated electropositive metal electrode may be manufactured by a process involving electroplating electropositive metal through a conformable polymer-coated conductive substrate. The conformable polymer-coated conductive substrate may be prepared by coating the conductive substrate in a conformable polymer solution followed by evaporating the solvent. Alternatively, an electropositive metal electrode may be coated directly with the conformable polymer.