Loading patent…
AssigneeZhuhai Cosmx Battery Co., Ltd.
InventorsWeichao Tang, Suli Li, Wei Zhao, Hao Yuan, Chunyang Liu, Junyi Li, Yanming Xu
Estimating the term…
A positive electrode piece and a secondary battery including the same. By selecting a type of polymer electrolyte prepared from a polymer different from that in the prior art as the solid electrolyte in the positive electrode piece, the solid electrolyte have both a bonding function and a lithium conduction function, may replace a binder and a solid electrolytes in an existing electrode piece, can effectively improve and enhance the lithium ion transmission performance, and reduce the internal resistance of the battery. Meanwhile, the positive electrode piece including the solid electrolyte has a low porosity, below about 5%, which greatly reduces voids and holes in the positive electrode piece, increases the content of the positive-electrode active material in unit volume, improves the transmission of lithium ions and electrons, and effectively improves the energy density, cycling performance and rate performance of the battery.
A positive electrode piece, wherein the positive electrode piece comprises a positive-electrode current collector and a positive-electrode active material layer coated on one or both surfaces of the positive-electrode current collector, the positive-electrode active material layer comprises a positive-electrode active material, a conductive agent and a polymer electrolyte, wherein the polymer electrolyte comprises a polymer and a lithium salt, and the polymer comprises a repeating unit as shown in Formula 1 below:
Dependencies are inferred from the claim text.