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Title: All Solid-State Li/LLZO/LCO Battery Enabled by Alumina Interfacial Coating

Journal Article · · Journal of the Electrochemical Society

Li7La3Zr2O12(LLZO) garnet-type lithium-ion conductors are being investigated as a promising solid electrolyte for solid-state lithium batteries. To enable a functional all-solid-state configuration intensive investigations are needed to reduce the cathode/electrolyte interfacial resistance which contributes the most to cell performance loss. Among the commercial cathode materials investigated so far, LiCoO2(LCO) is one of the most stable with garnet electrolytes as only a superficial reaction has been detected between the two materials. However, even this minor reaction would block the Li-ion transport through the interface, resulting in deteriorated cell performance. In this work, we demonstrate that a thin aluminum oxide layer (5 nm) can be an effective interlayer to impede the formation of a harmful interphase and enable facile Li-ion transfer between LCO and the LLZO garnet. Room-temperature-sputtered LCO thin films were employed to form an interface with the garnet electrolyte and annealed at 800 °C to reveal the effect of the interfacial reaction on the Li-ion transfer across the interface. An aluminum oxide layer was then introduced between LCO and the garnet electrolyte by sputtering a metallic aluminum layer which is then annealed together with the upper LCO layer in oxygen, or by direct atomic layer deposition of the oxide. Compared to the LCO/LLZO/Li cells without an aluminum oxide interlayer, those with the interlayer exhibited improved performance, i.e., a stable discharge capacity of up to 90 mAh/(g LCO) at a C/10 rate, a rate capability up to 1.68C and a stable galvanostatic cycling at 0.1C for over 100 cycles with a discharge capacity fade rate of 0.15% per cycle. It was determined that aluminum diffused into the LCO layer after preventing the initial detrimental reaction between LCO and the LLZO garnet from happening during high temperature annealing, suggesting that the coating does not have to remain a physically blocking layer during cycling to function.

Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
DOE Contract Number:
EE0008858
OSTI ID:
1980879
Journal Information:
Journal of the Electrochemical Society, Vol. 169, Issue 4; ISSN 0013-4651
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

References (45)

Oxide Electrolytes for Lithium Batteries journal September 2015
Achieving high capacity in bulk-type solid-state lithium ion battery based on Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 electrolyte: Interfacial resistance journal August 2016
Chemical compatibility between garnet-like solid state electrolyte Li6.75La3Zr1.75Ta0.25O12 and major commercial lithium battery cathode materials journal September 2016
Structure, Chemistry, and Charge Transfer Resistance of the Interface between Li 7 La 3 Zr 2 O 12 Electrolyte and LiCoO 2 Cathode journal July 2018
Characterization of the interface between LiCoO2 and Li7La3Zr2O12 in an all-solid-state rechargeable lithium battery journal January 2011
In-situ Li7La3Zr2O12/LiCoO2 interface modification for advanced all-solid-state battery journal August 2014
Fast Charge Transfer across the Li 7 La 3 Zr 2 O 12 Solid Electrolyte/LiCoO 2 Cathode Interface Enabled by an Interphase-Engineered All-Thin-Film Architecture journal July 2020
Garnet-type oxide electrolyte with novel porous-dense bilayer configuration for rechargeable all-solid-state lithium batteries journal July 2017
All-solid-state lithium ion battery using garnet-type oxide and Li3BO3 solid electrolytes fabricated by screen-printing journal September 2013
Electrochemical Nature of the Cathode Interface for a Solid-State Lithium-Ion Battery: Interface between LiCoO 2 and Garnet-Li 7 La 3 Zr 2 O 12 journal October 2016
Interphase Engineering Enabled All-Ceramic Lithium Battery journal March 2018
Mixed Anion Effect in Conductivity of Rapidly Quenched Li4SiO4-Li3BO3 Glasses journal January 1987
Novel LiCoO2 Cathode Material with Al2O3 Coating for a Li Ion Cell journal December 2000
Cathode materials modified by surface coating for lithium ion batteries journal May 2006
Role of surface coating on cathode materials for lithium-ion batteries journal January 2010
Fabrication of All-Solid-State Lithium Polymer Secondary Batteries Using Al 2 O 3 -Coated LiCoO 2 journal November 2005
Nanoscale Interface Modification of LiCoO 2 by Al 2 O 3 Atomic Layer Deposition for Solid-State Li Batteries journal January 2012
Negating interfacial impedance in garnet-based solid-state Li metal batteries journal December 2016
How Do Li Atoms Pass through the Al 2 O 3 Coating Layer during Lithiation in Li-ion Batteries? journal July 2013
Li+ Diffusion in Amorphous and Crystalline Al2O3 for Battery Electrode Coatings journal September 2021
Effects of Li source on microstructure and ionic conductivity of Al-contained Li6.75La3Zr1.75Ta0.25O12 ceramics journal February 2015
LiCoO2/Li6.75La3Zr1.75Nb0.25O12 interface modification enables all-solid-state battery journal October 2021
High-rate lithium cycling in a scalable trilayer Li-garnet-electrolyte architecture journal January 2019
Computation-guided discovery of coating materials to stabilize the interface between lithium garnet solid electrolyte and high-energy cathodes for all-solid-state lithium batteries journal October 2021
LiCoO[sub 2] and LiMn[sub 2]O[sub 4] Thin-Film Electrodes for Rechargeable Lithium Batteries journal January 2003
A garnet structure-based all-solid-state Li battery without interface modification: resolving incompatibility issues on positive electrodes journal January 2019
Avoiding CO 2 Improves Thermal Stability at the Interface of Li 7 La 3 Zr 2 O 12 Electrolyte with Layered Oxide Cathodes journal February 2022
The origin of conductivity variations in Al-stabilized Li7La3Zr2O12 ceramics journal June 2018
The grain boundary impedance of random microstructures: numerical simulations and implications for the analysis of experimental data journal September 2002
Fabrication of LiCoO2 thin-film cathodes for rechargeable lithium microbatteries journal February 2001
High performance sputtered LiCoO2 thin films obtained at a moderate annealing treatment combined to a bias effect journal January 2012
Epitaxial LiCoO 2 Films as a Model System for Fundamental Electrochemical Studies of Positive Electrodes journal April 2015
Impact of the Crystal Orientation of Positive Electrodes on the Interface Resistance across a Solid Electrolyte and Electrode journal June 2020
Raman spectroscopic determination of phase evolutions in LiAlxCo1−xO2 battery materials journal January 2001
Understanding the Role of Temperature and Cathode Composition on Interface and Bulk: Optimizing Aluminum Oxide Coatings for Li-Ion Cathodes journal April 2017
Effects of Al doping on the microstructure of LiCoO2 cathode materials journal January 2001
Effect of Al2O3 coating on electrochemical performance of LiCoO2 as cathode materials for secondary lithium batteries journal May 2004
Garnet-type solid-state fast Li ion conductors for Li batteries: critical review journal January 2014
Theoretical study of cubic-Li7La3Zr2O12(001)/LiCoO2(10–14) interface journal March 2018
First principles study on electrochemical and chemical stability of solid electrolyte–electrode interfaces in all-solid-state Li-ion batteries journal January 2016
First-Principles Studies on Cation Dopants and Electrolyte|Cathode Interphases for Lithium Garnets journal May 2015
Mechanism Study on the Interfacial Stability of a Lithium Garnet-Type Oxide Electrolyte against Cathode Materials journal October 2018
Reactive-sputter-deposited TiN films on glass substrates journal March 1991
Preferred Orientation of Polycrystalline LiCoO[sub 2] Films journal January 2000
Lattice model calculation of the strain energy density and other properties of crystalline LiCoO2 journal June 1998