Microstructure- and Interface-Modified Ni-Rich Cathode for High-Energy-Density All-Solid-State Lithium Batteries

Un Hyuck Kim; Tae Yeon Yu; Jin Wook Lee; Han Uk Lee; Ilias Belharouak; Chong Seung Yoon; Yang Kook Sun

doi:10.1021/acsenergylett.2c02715

Microstructure- and Interface-Modified Ni-Rich Cathode for High-Energy-Density All-Solid-State Lithium Batteries

Un Hyuck Kim
, Tae Yeon Yu
, Jin Wook Lee
, Han Uk Lee
, Ilias Belharouak
, Chong Seung Yoon
, Yang Kook Sun

Electrification and Energy Infrastructur

Research output: Contribution to journal › Article › peer-review

67 Scopus citations

Abstract

Electric vehicles powered by Li-ion batteries pose a potential safety risk because the flammable liquid electrolytes can, under certain conditions, cause explosions. All-solid-state batteries (ASSBs) are safe alternative battery technologies. However, realizing high-energy-density ASSBs by employing Ni-rich layered cathodes is difficult because of the detrimental volume contraction near charge end. This study shows that the simultaneous B doping and coating of a Ni-rich Li[Ni_0.9Co_0.05Mn_0.05]O₂ cathode, which modifies the cathode microstructure and cathode-solid electrolyte interface, respectively, afford an ASSB that cycles stably for 300 cycles with minimal capacity fading. An ASSB featuring the B-doped, B-coated Li[Ni_0.9Co_0.05Mn_0.05]O₂ cathode demonstrates a discharge capacity of 214 mAh g^-1, which represents one of the highest discharge capacities achieved by an ASSB; moreover, the ASSB retains 91% of its initial capacity after 300 cycles and easily outperforms previously reported ASSBs in terms of energy density without compromising cycling stability.

Original language	English
Pages (from-to)	809-817
Number of pages	9
Journal	ACS Energy Letters
Volume	8
Issue number	1
DOIs	https://doi.org/10.1021/acsenergylett.2c02715
State	Published - Jan 13 2023

Funding

This work was supported by the Human Resources Development Program (No. 20214000000320) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), funded by the Ministry of Trade, Industry, and Energy of the Korean Government. This work was also supported by the Technology Innovation Program (20012330, Development of manufacturing technology for high performance cathode electrode with an areal capacity of 6 mAh/cm for all solid state battery) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). 2

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title = "Microstructure- and Interface-Modified Ni-Rich Cathode for High-Energy-Density All-Solid-State Lithium Batteries",

abstract = "Electric vehicles powered by Li-ion batteries pose a potential safety risk because the flammable liquid electrolytes can, under certain conditions, cause explosions. All-solid-state batteries (ASSBs) are safe alternative battery technologies. However, realizing high-energy-density ASSBs by employing Ni-rich layered cathodes is difficult because of the detrimental volume contraction near charge end. This study shows that the simultaneous B doping and coating of a Ni-rich Li[Ni0.9Co0.05Mn0.05]O2 cathode, which modifies the cathode microstructure and cathode-solid electrolyte interface, respectively, afford an ASSB that cycles stably for 300 cycles with minimal capacity fading. An ASSB featuring the B-doped, B-coated Li[Ni0.9Co0.05Mn0.05]O2 cathode demonstrates a discharge capacity of 214 mAh g-1, which represents one of the highest discharge capacities achieved by an ASSB; moreover, the ASSB retains 91\% of its initial capacity after 300 cycles and easily outperforms previously reported ASSBs in terms of energy density without compromising cycling stability.",

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T1 - Microstructure- and Interface-Modified Ni-Rich Cathode for High-Energy-Density All-Solid-State Lithium Batteries

AU - Kim, Un Hyuck

AU - Yu, Tae Yeon

AU - Lee, Jin Wook

AU - Lee, Han Uk

AU - Belharouak, Ilias

AU - Yoon, Chong Seung

AU - Sun, Yang Kook

PY - 2023/1/13

Y1 - 2023/1/13

N2 - Electric vehicles powered by Li-ion batteries pose a potential safety risk because the flammable liquid electrolytes can, under certain conditions, cause explosions. All-solid-state batteries (ASSBs) are safe alternative battery technologies. However, realizing high-energy-density ASSBs by employing Ni-rich layered cathodes is difficult because of the detrimental volume contraction near charge end. This study shows that the simultaneous B doping and coating of a Ni-rich Li[Ni0.9Co0.05Mn0.05]O2 cathode, which modifies the cathode microstructure and cathode-solid electrolyte interface, respectively, afford an ASSB that cycles stably for 300 cycles with minimal capacity fading. An ASSB featuring the B-doped, B-coated Li[Ni0.9Co0.05Mn0.05]O2 cathode demonstrates a discharge capacity of 214 mAh g-1, which represents one of the highest discharge capacities achieved by an ASSB; moreover, the ASSB retains 91% of its initial capacity after 300 cycles and easily outperforms previously reported ASSBs in terms of energy density without compromising cycling stability.

AB - Electric vehicles powered by Li-ion batteries pose a potential safety risk because the flammable liquid electrolytes can, under certain conditions, cause explosions. All-solid-state batteries (ASSBs) are safe alternative battery technologies. However, realizing high-energy-density ASSBs by employing Ni-rich layered cathodes is difficult because of the detrimental volume contraction near charge end. This study shows that the simultaneous B doping and coating of a Ni-rich Li[Ni0.9Co0.05Mn0.05]O2 cathode, which modifies the cathode microstructure and cathode-solid electrolyte interface, respectively, afford an ASSB that cycles stably for 300 cycles with minimal capacity fading. An ASSB featuring the B-doped, B-coated Li[Ni0.9Co0.05Mn0.05]O2 cathode demonstrates a discharge capacity of 214 mAh g-1, which represents one of the highest discharge capacities achieved by an ASSB; moreover, the ASSB retains 91% of its initial capacity after 300 cycles and easily outperforms previously reported ASSBs in terms of energy density without compromising cycling stability.

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SN - 2380-8195

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JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 1

ER -

Microstructure- and Interface-Modified Ni-Rich Cathode for High-Energy-Density All-Solid-State Lithium Batteries

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