US2020251784A1PendingUtilityA1

High-performance thin-film battery with an interfacial layer

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Assignee: IBMPriority: Oct 2, 2017Filed: Apr 14, 2020Published: Aug 6, 2020
Est. expiryOct 2, 2037(~11.2 yrs left)· nominal 20-yr term from priority
Inventors:Ning LiJoel P. De SouzaYun Seog LeeDevendra K. Sadana
Y02P70/50Y02E60/10H01M 10/0525H01M 10/0562H01M 4/0426H01M 2220/30H01M 10/0583H01M 4/366
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Claims

Abstract

An all solid-state lithium-based thin-film battery is provided. The all solid-state lithium-based thin-film battery includes a battery material stack of, from bottom to top, an anode-side electrode, an anode region, an aluminum oxide interfacial layer, a solid-state electrolyte layer, a cathode layer, and a cathode-side electrode layer. The all solid-state lithium-based thin-film battery stack is formed by first forming the anode-side of the battery stack and thereafter forming the cathode-side. All solid-state lithium-based thin-film batteries including the aluminum oxide interfacial layer located between the anode region and the solid-state electrolyte layer have improved performance, high capacity, and high reliability.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A solid-state lithium-based battery comprising:
 an anode-side electrode located on a substrate;   an aluminum oxide interfacial layer located on the anode-side electrode;   a lithium-based solid-state electrolyte layer located on the aluminum oxide interfacial layer;   a lithiated cathode material layer located on the lithium-based solid-state electrolyte layer; and   a cathode-side electrode located the lithiated cathode material layer.   
     
     
         2 . The solid-state lithium-based battery of  claim 1 , further comprising an anode region located between the aluminum oxide interfacial layer and the anode-side electrode. 
     
     
         3 . The solid-state lithium-based battery of  claim 2 , wherein the anode region is a lithium accumulation region formed during a charging/recharging process. 
     
     
         4 . The solid-state lithium-based battery of  claim 2 , wherein the anode region is a deposited anode material. 
     
     
         5 . The solid-state lithium-based battery of  claim 1 , wherein the aluminum oxide interfacial layer has a thickness from 1 nm to 50 nm. 
     
     
         6 . The solid-state lithium-based battery of  claim 1 , wherein the substrate has a textured surface. 
     
     
         7 . The solid-state lithium-based battery of  claim 1 , wherein the solid-state lithium-based battery has a charge rate of greater than 3 C. 
     
     
         8 . The solid-state lithium-based battery of  claim 1 , wherein the solid-state lithium-based battery has a specific charge capacity of greater than 50 mAh/g. 
     
     
         9 . The solid-state lithium-based battery of  claim 2 , wherein the aluminum oxide interfacial layer prevents oxidation of the anode region. 
     
     
         10 . The solid-state lithium-based battery of  claim 1 , wherein the aluminum oxide interfacial layer provides for a uniform lithium distribution in the battery. 
     
     
         11 . A method of forming a solid-state lithium-based battery, the method comprising:
 forming an anode-side electrode on a substrate;   forming an aluminum oxide interfacial layer directly on a surface of the anode-side electrode;   forming a lithium-based solid-state electrolyte layer on the aluminum oxide interfacial layer;   forming a lithiated cathode material layer the lithium-based solid-state electrolyte layer;   forming a cathode-side electrode on the lithiated cathode material layer; and   forming an anode region between the aluminum oxide interfacial layer and the anode-side electrode, wherein the forming the anode region comprises performing a charging/recharging process after forming the cathode-side electrode.   
     
     
         12 . The method of  claim 11 , wherein the aluminum oxide interfacial layer has a thickness from 1 nm to 50 nm. 
     
     
         13 . The method of  claim 11 , wherein the substrate has a textured surface. 
     
     
         14 . The method of  claim 11 , wherein the solid-state lithium-based battery has a charge rate of greater than 3 C. 
     
     
         15 . The method of  claim 11 , wherein the solid-state lithium-based battery has a specific charge capacity of greater than 50 mAh/g. 
     
     
         16 . The method of  claim 11 , wherein the aluminum oxide interfacial layer prevents oxidation of the anode region. 
     
     
         17 . The method of  claim 11 , wherein the aluminum oxide interfacial layer provides for a uniform lithium distribution in the battery. 
     
     
         18 . A method of forming a solid-state lithium-based battery, the method comprising:
 forming an anode-side electrode on a substrate;   forming, via a deposition process, an anode region directly on a surface of the anode-side electrode;   forming an aluminum oxide interfacial layer directly on a surface of the anode region;   forming a lithium-based solid-state electrolyte layer on the aluminum oxide interfacial layer;   forming a lithiated cathode material layer the lithium-based solid-state electrolyte layer; and   forming a cathode-side electrode on the lithiated cathode material layer.   
     
     
         19 . The method of  claim 18 , wherein the aluminum oxide interfacial layer prevents oxidation of the anode region. 
     
     
         20 . The method of  claim 18 , wherein the aluminum oxide interfacial layer provides for a uniform lithium distribution in the battery.

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