Lithiated Spinel LiCo1-xAlxO2 as a Stable Zero-Strain Cathode

Eungje Lee; Bob Jin Kwon; Fulya Dogan; Yang Ren; Jason R. Croy; Michael M. Thackeray

doi:10.1021/acsaem.9b01503

Lithiated Spinel LiCo_1-_xAl_xO₂ as a Stable Zero-Strain Cathode

Eungje Lee^*, Bob Jin Kwon, Fulya Dogan, Yang Ren, Jason R. Croy, Michael M. Thackeray

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

22 Citations (Scopus)

Abstract

We report the discovery of a new zero-strain cathode, LiCo_1-xAl_xO₂ (0 < x ≤ 0.5), which has a lithiated spinel structure synthesized at "low temperature" (LT). Lithiated spinel LiCo_1-xAl_xO₂ operates at the highest average potential (3.7 V vs Li) with the lowest volume change (ΔV ≤ 0.02%) ever reported for a zero-strain lithium electrode. Unlike other zero-strain spinel materials such as Li₄Ti₅O₁₂ and LiRh₂O₄ that undergo a reversible two-phase reaction, lithiated spinel LiCo_1-xAl_xO₂ electrodes operate by a single-phase process. The study opens the door to the design of a new family of zero-strain materials that can be used as a stable cathode for all-solid-state batteries.

Original language	English
Pages (from-to)	6170-6175
Journal	ACS Applied Energy Materials
Volume	2
Issue number	9
Online published	6 Sept 2019
DOIs	https://doi.org/10.1021/acsaem.9b01503
Publication status	Published - 23 Sept 2019
Externally published	Yes

Research Keywords

aluminum substitution
cathode
lithiated spinel
lithium-ion battery
solid-state battery
zero-strain

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Cite this

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title = "Lithiated Spinel LiCo1-xAlxO2 as a Stable Zero-Strain Cathode",

abstract = "We report the discovery of a new zero-strain cathode, LiCo1-xAlxO2 (0 < x ≤ 0.5), which has a lithiated spinel structure synthesized at {"}low temperature{"} (LT). Lithiated spinel LiCo1-xAlxO2 operates at the highest average potential (3.7 V vs Li) with the lowest volume change (ΔV ≤ 0.02%) ever reported for a zero-strain lithium electrode. Unlike other zero-strain spinel materials such as Li4Ti5O12 and LiRh2O4 that undergo a reversible two-phase reaction, lithiated spinel LiCo1-xAlxO2 electrodes operate by a single-phase process. The study opens the door to the design of a new family of zero-strain materials that can be used as a stable cathode for all-solid-state batteries.",

keywords = "aluminum substitution, cathode, lithiated spinel, lithium-ion battery, solid-state battery, zero-strain",

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T1 - Lithiated Spinel LiCo1-xAlxO2 as a Stable Zero-Strain Cathode

AU - Lee, Eungje

AU - Kwon, Bob Jin

AU - Dogan, Fulya

AU - Ren, Yang

AU - Croy, Jason R.

AU - Thackeray, Michael M.

PY - 2019/9/23

Y1 - 2019/9/23

N2 - We report the discovery of a new zero-strain cathode, LiCo1-xAlxO2 (0 < x ≤ 0.5), which has a lithiated spinel structure synthesized at "low temperature" (LT). Lithiated spinel LiCo1-xAlxO2 operates at the highest average potential (3.7 V vs Li) with the lowest volume change (ΔV ≤ 0.02%) ever reported for a zero-strain lithium electrode. Unlike other zero-strain spinel materials such as Li4Ti5O12 and LiRh2O4 that undergo a reversible two-phase reaction, lithiated spinel LiCo1-xAlxO2 electrodes operate by a single-phase process. The study opens the door to the design of a new family of zero-strain materials that can be used as a stable cathode for all-solid-state batteries.

AB - We report the discovery of a new zero-strain cathode, LiCo1-xAlxO2 (0 < x ≤ 0.5), which has a lithiated spinel structure synthesized at "low temperature" (LT). Lithiated spinel LiCo1-xAlxO2 operates at the highest average potential (3.7 V vs Li) with the lowest volume change (ΔV ≤ 0.02%) ever reported for a zero-strain lithium electrode. Unlike other zero-strain spinel materials such as Li4Ti5O12 and LiRh2O4 that undergo a reversible two-phase reaction, lithiated spinel LiCo1-xAlxO2 electrodes operate by a single-phase process. The study opens the door to the design of a new family of zero-strain materials that can be used as a stable cathode for all-solid-state batteries.

KW - aluminum substitution

KW - cathode

KW - lithiated spinel

KW - lithium-ion battery

KW - solid-state battery

KW - zero-strain

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DO - 10.1021/acsaem.9b01503

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JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

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