Solid State Cell and Associated Manufacturing Method

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes an improved solid-state cell and solid-state battery that use a NaSICON-based solid electrolyte. The core innovation is either applying a continuous material layer (such as a polymer or resin) or modifying the chemical composition of the electrolyte's outer surface (for example, with salts or by chemical reaction) on regions not in contact with the electrodes. These modifications significantly reduce the formation of harmful sodium filaments or dendrites during operation, enabling the cell to operate at much higher current densities and improving safety and longevity.

Use CasesContent extracted from patent full text and abstract with AI.

• Stationary energy storage systems, especially for renewable energy sources like wind and solar power.
• Rechargeable sodium-ion solid-state batteries for grid storage and backup power applications.
• Batteries requiring high safety, longevity, and tolerance to high current densities.
• Replacement for traditional lithium-based solid-state or liquid-electrolyte batteries, particularly where sodium cost and material availability are advantageous.
• Industrial or critical infrastructure energy storage where high operating current and safety are vital.

BenefitsContent extracted from patent full text and abstract with AI.

• Prevents formation of sodium filaments and dendrites, reducing short-circuit risks and battery failure.
• Allows stable battery operation at much higher current densities (2–3 times higher than previous technologies).
• Improves battery safety due to solid-state electrolyte and robust design against dendrite growth.
• Enables use of cost-effective and abundant sodium-based materials instead of scarcer lithium.
• Simpler and lower-cost manufacturing using easily available resins, polymers, or salts.
• Material layer/barrier is chemically inert and does not react with sodium, preserving battery integrity.
• Improved air and moisture resistance via the protective layer or outer surface modification.
• Enhanced longevity and cycling life for energy storage applications.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a solid state cell, a solid state battery, and an associated method for manufacturing a solid state cell. A solid state cell (10) has an electrolyte (20) which comprises NaSICON. The solid state cell (10) comprises a first electrode (12) located on a first region (21) of the electrolyte (20), and a second electrode (14) located on a second region (22) of the electrolyte (20). A continuous material layer (30) is located on at least a third region (23) of the electrolyte (20) on an outer surface (25) of the electrolyte (20). Alternatively, a chemical composition of the outer surface (25) in the third region (23) of the electrolyte (20) is modified. This makes it possible to effectively prevent the formation of filaments or dendrites and to operate at significantly increased current densities.