A quad-polymer composition includes monomers of (a) acrylonitrile, (a) vinylimidazole, (c) methyl acrylate and (d) either acrylic acid or itaconic acid. Such quad-polymer compositions may be used to form fibers (such as by melt spinning) that may then be annealed, stabilized, and/or carbonized to produce carbon fibers. The quad-polymer composition may be used for supercapacitors, lithium battery electrodes once carbonized, and as synthesized, it may be used for wound healing fibers, fabrics, coatings, and films, and anti-bacterial/anti-microbial fibers, fabrics, coatings and films. The carbon fibers formed from the quad-polymer composition may be used for the fiber composites for automobile, aerospace structures, marine structures, military equipment/parts, sporting goods, robotics, furniture, and electronic parts.

A quad-polymer composition includes monomers of (a) acrylonitrile, (a) vinylimidazole, (c) methyl acrylate and (d) either acrylic acid or itaconic acid. Such quad-polymer compositions may be used to form fibers (such as by melt spinning) that may then be annealed, stabilized, and/or carbonized to produce carbon fibers. The quad-polymer composition may be used for supercapacitors, lithium battery electrodes once carbonized, and as synthesized, it may be used for wound healing fibers, fabrics, coatings, and films, and anti-bacterial/anti-microbial fibers, fabrics, coatings and films. The carbon fibers formed from the quad-polymer composition may be used for the fiber composites for automobile, aerospace structures, marine structures, military equipment/parts, sporting goods, robotics, furniture, and electronic parts.

Provided is a new technique that can sufficiently inhibit heat generation in the event of an internal short circuit of an electrochemical device while also reducing IV resistance at low temperature and improving high-temperature storage characteristics of the electrochemical device. A binder composition for an electrochemical device contains a binder and a thermally decomposable material. The thermally decomposable material includes a foaming agent. The thermally decomposable material has a thermal decomposition temperature of 150° C. to 400° C., a number-average particle diameter of 0.01 μm to 10 μm, a ratio of the number-average particle diameter relative to volume-average particle diameter of 0.05 to 1, and a circularity of 0.05 to 0.95.

Provided is a new technique that can sufficiently inhibit heat generation in the event of an internal short circuit of an electrochemical device while also reducing IV resistance at low temperature and improving high-temperature storage characteristics of the electrochemical device. A binder composition for an electrochemical device contains a binder and a thermally decomposable material. The thermally decomposable material includes a foaming agent. The thermally decomposable material has a thermal decomposition temperature of 150° C. to 400° C., a number-average particle diameter of 0.01 μm to 10 μm, a ratio of the number-average particle diameter relative to volume-average particle diameter of 0.05 to 1, and a circularity of 0.05 to 0.95.

Disclosed is a statistical copolymer that includes both zwitterionic repeat units and hydrophobic repeat units, and a filtration membrane that contains a selective layer formed of the statistical copolymer. Also disclosed are methods of preparing the above-described filtration membrane.

Disclosed is a statistical copolymer that includes both zwitterionic repeat units and hydrophobic repeat units, and a filtration membrane that contains a selective layer formed of the statistical copolymer. Also disclosed are methods of preparing the above-described filtration membrane.

Provided herein are rechargeable battery (e.g., Li-ion and Li-metal anode) catholytes and electrolyte separators that include a chemically cross-linked polymer and a solvent selected from the group consisting of a nitrile, a dinitrile, or a combination thereof; processes for making and using the same; and rechargeable batteries and electrochemical cells that include high voltage stable catholytes and/or electrolyte separators.

Provided herein are rechargeable battery (e.g., Li-ion and Li-metal anode) catholytes and electrolyte separators that include a chemically cross-linked polymer and a solvent selected from the group consisting of a nitrile, a dinitrile, or a combination thereof; processes for making and using the same; and rechargeable batteries and electrochemical cells that include high voltage stable catholytes and/or electrolyte separators.

An acrylonitrile copolymer binder and application thereof in lithium ion battery. The technical problem to be solved is to provide an acrylonitrile copolymer binder including the following structural units in percentage by weight: 78-95% of acrylonitrile unit, 1-10% of acrylic ester unit and 2-15% of acrylamide unit. For the binder, acrylonitrile monomer is taken as the main body, and acrylic ester monomer, acrylamide monomer or acrylate monomer with strong polarity is added to acrylonitrile for copolymerization to enable the flexibility of a polymer membrane, the affinity of an electrolyte and the proper swelling degree in the electrolyte while keeping strong adhesion or intermolecular force of acrylonitrile polymer molecules, so as to fit the periodic volume changes of electrode active materials along with lithium ion intercalation/deintercalation in charging and discharging processes, thereby improving the energy density and cycle performance of the lithium ion battery.

An acrylonitrile copolymer binder and application thereof in lithium ion battery. The technical problem to be solved is to provide an acrylonitrile copolymer binder including the following structural units in percentage by weight: 78-95% of acrylonitrile unit, 1-10% of acrylic ester unit and 2-15% of acrylamide unit. For the binder, acrylonitrile monomer is taken as the main body, and acrylic ester monomer, acrylamide monomer or acrylate monomer with strong polarity is added to acrylonitrile for copolymerization to enable the flexibility of a polymer membrane, the affinity of an electrolyte and the proper swelling degree in the electrolyte while keeping strong adhesion or intermolecular force of acrylonitrile polymer molecules, so as to fit the periodic volume changes of electrode active materials along with lithium ion intercalation/deintercalation in charging and discharging processes, thereby improving the energy density and cycle performance of the lithium ion battery.