Cathode and secondary lithium cell using the same

TLDR: In this paper, the utility model relates to a secondary lithium cell cathode, which comprises cathode active materials and water absorbents dispersed in the active materials, wherein the water absorbent has strong water absorbability of dewpoint below-56 DEG C, which can completely adsorb moisture remained in the process of the preparation of a primary lithium cell and soaked by the gas permeability of water molecules when in use.

Abstract: The utility model relates to a secondary lithium cell cathode, which comprises cathode active materials and water absorbents dispersed in the cathode active materials, wherein the cathode active materials comprise carbon materials, such as graphite, carbon filament, carbon nanotubes, etc; in addition, transitional metal or oxide of the transitional metal can be also adopted, such as tin and oxide of the tin; the water absorbent comprises a lithiation molecular sieve, activated carbon, activated alumina, silica gel, calcia, calcium sulphate, etc, and the water absorbent has strong water absorbability of dewpoint below-56 DEG C; the water absorbent can completely adsorb moisture remained in the process of the preparation of a secondary lithium cell and soaked by the gas permeability of water molecules when in use, which can prevent lithium cell poisoning As a consequence, the service life of the secondary lithium cell is enhanced The utility model also relates to a secondary lithium cell using the same cathode