Selective doping of Li-rich layered oxide cathode materials for high-stability rechargeable Li-ion batteries

Dongwook Han; Kwangjin Park; Jun Ho Park; Dong Jin Yun; You Hwan Son

doi:10.1016/j.jiec.2018.07.044

Selective doping of Li-rich layered oxide cathode materials for high-stability rechargeable Li-ion batteries

Dongwook Han, Kwangjin Park, Jun Ho Park, Dong Jin Yun, You Hwan Son

Dept. of Future Energy Convergence

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

21 Scopus citations

Abstract

We report the discovery of Li-rich Li_1+x[(Ni_0.225Co_0.15Mn_0.625)_1−yV_y]O₂ as a cathode material for rechargeable lithium-ion batteries in which a small amount of tetravalent vanadium (V⁴⁺) is selectively and completely incorporated into the manganese sites in the lattice structure. The unwanted oxidation of vanadium to form a V₂O₅-like secondary phase during high-temperature crystallization is prevented by uniformly dispersing the vanadium ions in coprecipitated [(Ni_0.225Co_0.15Mn_0.625)_1−yV_y](OH)₂ particles. Upon doping with V⁴⁺ ions, the initial discharge capacity (>275 mA h g⁻¹), capacity retention, and voltage decay characteristics of the Li-rich layered oxides are improved significantly in comparison with those of the conventional undoped counterpart.

Original language	English
Pages (from-to)	180-186
Number of pages	7
Journal	Journal of Industrial and Engineering Chemistry
Volume	68
DOIs	https://doi.org/10.1016/j.jiec.2018.07.044
State	Published - 25 Dec 2018

Keywords

Coprecipitation
Lithium-rich layered oxide
Rechargeable lithium-ion batteries
Selective doping site
Vanadium ion

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jiec.2018.07.044

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title = "Selective doping of Li-rich layered oxide cathode materials for high-stability rechargeable Li-ion batteries",

abstract = "We report the discovery of Li-rich Li1+x[(Ni0.225Co0.15Mn0.625)1−yVy]O2 as a cathode material for rechargeable lithium-ion batteries in which a small amount of tetravalent vanadium (V4+) is selectively and completely incorporated into the manganese sites in the lattice structure. The unwanted oxidation of vanadium to form a V2O5-like secondary phase during high-temperature crystallization is prevented by uniformly dispersing the vanadium ions in coprecipitated [(Ni0.225Co0.15Mn0.625)1−yVy](OH)2 particles. Upon doping with V4+ ions, the initial discharge capacity (>275 mA h g−1), capacity retention, and voltage decay characteristics of the Li-rich layered oxides are improved significantly in comparison with those of the conventional undoped counterpart.",

keywords = "Coprecipitation, Lithium-rich layered oxide, Rechargeable lithium-ion batteries, Selective doping site, Vanadium ion",

author = "Dongwook Han and Kwangjin Park and Park, \{Jun Ho\} and Yun, \{Dong Jin\} and Son, \{You Hwan\}",

note = "Publisher Copyright: {\textcopyright} 2018 The Korean Society of Industrial and Engineering Chemistry",

year = "2018",

month = dec,

day = "25",

doi = "10.1016/j.jiec.2018.07.044",

language = "English",

volume = "68",

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journal = "Journal of Industrial and Engineering Chemistry",

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T1 - Selective doping of Li-rich layered oxide cathode materials for high-stability rechargeable Li-ion batteries

AU - Han, Dongwook

AU - Park, Kwangjin

AU - Park, Jun Ho

AU - Yun, Dong Jin

AU - Son, You Hwan

PY - 2018/12/25

Y1 - 2018/12/25

N2 - We report the discovery of Li-rich Li1+x[(Ni0.225Co0.15Mn0.625)1−yVy]O2 as a cathode material for rechargeable lithium-ion batteries in which a small amount of tetravalent vanadium (V4+) is selectively and completely incorporated into the manganese sites in the lattice structure. The unwanted oxidation of vanadium to form a V2O5-like secondary phase during high-temperature crystallization is prevented by uniformly dispersing the vanadium ions in coprecipitated [(Ni0.225Co0.15Mn0.625)1−yVy](OH)2 particles. Upon doping with V4+ ions, the initial discharge capacity (>275 mA h g−1), capacity retention, and voltage decay characteristics of the Li-rich layered oxides are improved significantly in comparison with those of the conventional undoped counterpart.

AB - We report the discovery of Li-rich Li1+x[(Ni0.225Co0.15Mn0.625)1−yVy]O2 as a cathode material for rechargeable lithium-ion batteries in which a small amount of tetravalent vanadium (V4+) is selectively and completely incorporated into the manganese sites in the lattice structure. The unwanted oxidation of vanadium to form a V2O5-like secondary phase during high-temperature crystallization is prevented by uniformly dispersing the vanadium ions in coprecipitated [(Ni0.225Co0.15Mn0.625)1−yVy](OH)2 particles. Upon doping with V4+ ions, the initial discharge capacity (>275 mA h g−1), capacity retention, and voltage decay characteristics of the Li-rich layered oxides are improved significantly in comparison with those of the conventional undoped counterpart.

KW - Coprecipitation

KW - Lithium-rich layered oxide

KW - Rechargeable lithium-ion batteries

KW - Selective doping site

KW - Vanadium ion

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U2 - 10.1016/j.jiec.2018.07.044

DO - 10.1016/j.jiec.2018.07.044

M3 - Article

AN - SCOPUS:85051380909

SN - 1226-086X

VL - 68

SP - 180

EP - 186

JO - Journal of Industrial and Engineering Chemistry

JF - Journal of Industrial and Engineering Chemistry

ER -

Selective doping of Li-rich layered oxide cathode materials for high-stability rechargeable Li-ion batteries

Abstract

Keywords

UN SDGs

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