Lithium-Ion Solid-State Battery and Method for Manufacturing the Same

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The invention is a lithium-ion solid-state battery and an efficient process for manufacturing it. Unlike traditional batteries with liquid electrolytes, this battery uses a solid electrolyte layer, specifically comprised of a mixture of lithium vanadium phosphate (LVP), lithium aluminum titanium phosphate (LATP), and lithium titanium phosphate (LTP). The process emphasizes forming a dense electrolyte layer by pressing and sintering, optionally adding interface layers to ensure strong adhesion with the electrodes. The battery is fabricated using standard printing techniques for applying the different layers, making production easier and potentially more cost-effective.

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

• Power supply for electric vehicles (EVs) and hybrid vehicles
• Energy storage systems for renewable energy like solar or wind power plants
• Portable electronic devices such as smartphones, tablets, and laptops
• Medical devices requiring long-lasting, safe batteries
• Wearable devices and Internet of Things (IoT) sensors
• Backup power sources for critical infrastructure

BenefitsContent extracted from patent full text and abstract with AI.

• Improved battery safety due to the absence of flammable liquid electrolytes
• Potentially longer battery lifespan and increased stability through the use of solid electrolytes
• Higher mechanical robustness and better tolerance to environmental stress
• Facilitates scalable production using common printing techniques (screen printing, offset printing, ink-jet printing)
• Flexible material composition enables optimization for both performance and cost
• Reduced risk of leaking, overheating, and toxicity compared to conventional batteries

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Patent Abstract

The invention relates to a lithium ion solid-state battery, comprising an anode, a cathode and a solid electrolyte, wherein the solid electrolyte has a layer thickness between 100 μm and 800 μm, preferably between 200 μm and 500 μm and especially advantageously between 200 μm and 300 μm. The lithium ion solid-state battery comprises a mixture of lithium vanadium phosphate (LVP), lithium aluminum titanium phosphate (LATP), and lithium titanium phosphate (LTP). In order to produce a lithium ion solid-state battery according to the inventon, a pre-calcined electrolyte powder is pressed and is sintered to form an electrolyte layer. Then, the electrodes are applied and sintered on both sides. Before an electrode layer is applied, at least one intermediate layer can optionally be applied to the solid electrolyte for improved attachment of the electrode layer to the solid electrolyte. Preferably all common standard printing processes, such as screen printing, offset printing, or ink-jet printing, can be used to apply the layers.