2results about How to "Increase conductance" patented technology

This invention provides a secondary battery comprising a positive electrode, a negative electrode, and an electrolyte layer, wherein: the negative electrode is composed of a conductive current collector, a negative electrode active material, and a non-alkali metal monovalent ion conductor; the secondary battery is a sodium secondary battery or a lithium secondary battery. The secondary battery of this invention, such as an alkali metal secondary battery, is more stable under environmental conditions, easier to manufacture, less expensive, has improved rate performance, and significantly increased cycle life.

This invention relates to a high-efficiency, high-capacity silicon-carbon composite anode material, its preparation method, and its application. The silicon-carbon composite anode material comprises: a phosphorus-doped silicon-carbon material, and a composite coating layer covering the outer surface of the phosphorus-doped silicon-carbon material. A Si-P-C bond structure exists between the phosphorus-doped silicon-carbon material and the composite coating layer. The phosphorus-doped silicon-carbon material comprises: a porous carbon matrix, and nano-silicon particles and phosphorus elements deposited in the pores of the porous carbon matrix. The composite coating layer comprises: a carbon coating layer, and C-F bonds formed in situ within the carbon coating layer. Applying the silicon-carbon composite anode material provided in this invention to lithium-ion batteries can improve the first-cycle coulombic efficiency and cycle stability of lithium-ion batteries, and reduce the expansion rate.