Li1.2Ni0.25Mn0.55O2: A high-capacity cathode material with a homogeneous monoclinic Li2MnO3-like superstructure

Zhi Liang Wu; Hanjie Xie; Yingzi Li; Fangchang Zhang; Zhenyu Wang; Wei Zheng; Mingyang Yang; Zhenghe Xu; Zhouguang Lu

doi:10.1016/j.jallcom.2020.154202

Li_1.2Ni_0.25Mn_0.55O₂: A high-capacity cathode material with a homogeneous monoclinic Li₂MnO₃-like superstructure

Zhi Liang Wu, Hanjie Xie, Yingzi Li, Fangchang Zhang, Zhenyu Wang, Wei Zheng, Mingyang Yang, Zhenghe Xu^*, Zhouguang Lu

^*Corresponding author for this work

Chemical Engineering

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

21 Scopus citations

Abstract

High-energy lithium-rich and manganese-based layered materials are one of the most promising candidates for the cathode materials of lithium-ion batteries. These cathode materials can deliver anomalously high capacity due to multiple electron transfers involving both cationic and anionic redox processes. An unprecedented homogeneous monoclinic Li₂MnO₃-like structured material Li_1.2Ni_0.25Mn_0.55O₂, which with the highest nickel content among the Li-rich materials, is first disclosed in this work. Our proposed Li_1.2Ni_0.25Mn_0.55O₂ material can deliver a reversible capacity exceeding 295 mAh·g⁻¹ with a high and stable discharge voltage. It is especially encouraging that the as-prepared Li_1.2Ni_0.25Mn_0.55O₂ cathode material displays high charge-discharge efficiency and good capacity retention during cycling. In this work, we applied in-situ EIS and ex-situ XPS methods to systematically investigate the reversible structural evolution of Li_1.2Ni_0.25Mn_0.55O₂ cathode material and cathode-electrolyte interfaces (CEI). These findings will shed light on the design of high-performance cathode materials for lithium-ion batteries.

Original language	English
Article number	154202
Journal	Journal of Alloys and Compounds
Volume	827
DOIs	https://doi.org/10.1016/j.jallcom.2020.154202
State	Published - 25 Jun 2020

Keywords

Anionic redox
Cathode-electrolyte interfaces
Lithium-ion batteries
Lithium-rich cathode materials
Reversible structural variation

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10.1016/j.jallcom.2020.154202

Cite this

@article{70bd8b6d5db14b79a4e112166dfdadbe,

title = "Li1.2Ni0.25Mn0.55O2: A high-capacity cathode material with a homogeneous monoclinic Li2MnO3-like superstructure",

abstract = "High-energy lithium-rich and manganese-based layered materials are one of the most promising candidates for the cathode materials of lithium-ion batteries. These cathode materials can deliver anomalously high capacity due to multiple electron transfers involving both cationic and anionic redox processes. An unprecedented homogeneous monoclinic Li2MnO3-like structured material Li1.2Ni0.25Mn0.55O2, which with the highest nickel content among the Li-rich materials, is first disclosed in this work. Our proposed Li1.2Ni0.25Mn0.55O2 material can deliver a reversible capacity exceeding 295 mAh·g−1 with a high and stable discharge voltage. It is especially encouraging that the as-prepared Li1.2Ni0.25Mn0.55O2 cathode material displays high charge-discharge efficiency and good capacity retention during cycling. In this work, we applied in-situ EIS and ex-situ XPS methods to systematically investigate the reversible structural evolution of Li1.2Ni0.25Mn0.55O2 cathode material and cathode-electrolyte interfaces (CEI). These findings will shed light on the design of high-performance cathode materials for lithium-ion batteries.",

keywords = "Anionic redox, Cathode-electrolyte interfaces, Lithium-ion batteries, Lithium-rich cathode materials, Reversible structural variation",

author = "Wu, {Zhi Liang} and Hanjie Xie and Yingzi Li and Fangchang Zhang and Zhenyu Wang and Wei Zheng and Mingyang Yang and Zhenghe Xu and Zhouguang Lu",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = jun,

day = "25",

doi = "10.1016/j.jallcom.2020.154202",

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T2 - A high-capacity cathode material with a homogeneous monoclinic Li2MnO3-like superstructure

AU - Wu, Zhi Liang

AU - Xie, Hanjie

AU - Li, Yingzi

AU - Zhang, Fangchang

AU - Wang, Zhenyu

AU - Zheng, Wei

AU - Yang, Mingyang

AU - Xu, Zhenghe

AU - Lu, Zhouguang

PY - 2020/6/25

Y1 - 2020/6/25

N2 - High-energy lithium-rich and manganese-based layered materials are one of the most promising candidates for the cathode materials of lithium-ion batteries. These cathode materials can deliver anomalously high capacity due to multiple electron transfers involving both cationic and anionic redox processes. An unprecedented homogeneous monoclinic Li2MnO3-like structured material Li1.2Ni0.25Mn0.55O2, which with the highest nickel content among the Li-rich materials, is first disclosed in this work. Our proposed Li1.2Ni0.25Mn0.55O2 material can deliver a reversible capacity exceeding 295 mAh·g−1 with a high and stable discharge voltage. It is especially encouraging that the as-prepared Li1.2Ni0.25Mn0.55O2 cathode material displays high charge-discharge efficiency and good capacity retention during cycling. In this work, we applied in-situ EIS and ex-situ XPS methods to systematically investigate the reversible structural evolution of Li1.2Ni0.25Mn0.55O2 cathode material and cathode-electrolyte interfaces (CEI). These findings will shed light on the design of high-performance cathode materials for lithium-ion batteries.

AB - High-energy lithium-rich and manganese-based layered materials are one of the most promising candidates for the cathode materials of lithium-ion batteries. These cathode materials can deliver anomalously high capacity due to multiple electron transfers involving both cationic and anionic redox processes. An unprecedented homogeneous monoclinic Li2MnO3-like structured material Li1.2Ni0.25Mn0.55O2, which with the highest nickel content among the Li-rich materials, is first disclosed in this work. Our proposed Li1.2Ni0.25Mn0.55O2 material can deliver a reversible capacity exceeding 295 mAh·g−1 with a high and stable discharge voltage. It is especially encouraging that the as-prepared Li1.2Ni0.25Mn0.55O2 cathode material displays high charge-discharge efficiency and good capacity retention during cycling. In this work, we applied in-situ EIS and ex-situ XPS methods to systematically investigate the reversible structural evolution of Li1.2Ni0.25Mn0.55O2 cathode material and cathode-electrolyte interfaces (CEI). These findings will shed light on the design of high-performance cathode materials for lithium-ion batteries.

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KW - Reversible structural variation

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