Huawei releases solid-state battery patent

On November 5, Huawei announced a new invention of sulfide solid electrolyte, entitled "Doped sulfide materials and their preparation methods, lithium-ion batteries."

The patent application content shows that the doped sulfide material disclosed in this implementation method can be used as a sulfide solid electrolyte in lithium-ion batteries, so that the lithium-ion batteries have a longer service life.

Image source: State Intellectual Property Office

The lithium-ion battery disclosed in the embodiment of the present application has the characteristics of high energy density, high safety, long cycle life, high stability, etc., which can meet the ever-increasing performance requirements of lithium-ion batteries in various application scenarios such as future EVs and energy storage; it also solves the bottleneck problem of severe capacity attenuation caused by the shuttling of polysulfides (LiSx) in liquid lithium-sulfur battery systems.

According to the classification of electrolytes, the technical routes of solid-state batteries mainly include three systems: oxides, sulfides, and polymers. It is worth noting that sulfide solid-state batteries have relatively high ion conductivity and are superior to oxide solid-state batteries in energy density, cycle life, and fast charging.

The time for the solid-state battery industry to be put into operation is getting closer and closer. Judging from the R&D or project progress of major leading companies, semi-solid-state batteries are expected to be mass-produced and installed in batches in 2025; all-solid-state batteries will be mass-produced in small batches by 2027; and all-solid-state batteries are expected to be installed in batches by 2030.