Entropy‐Tuned Layered Oxide Cathodes for Potassium‐Ion Batteries

Shu Li; Lichen Wu; Hongwei Fu; Apparao M. Rao; Limei Cha; Jiang Zhou; Bingan Lu

doi:10.1002/smtd.202300893

Entropy‐Tuned Layered Oxide Cathodes for Potassium‐Ion Batteries

Shu Li, Lichen Wu, Hongwei Fu^*, Apparao M. Rao, Limei Cha, Jiang Zhou, Bingan Lu^*

^*Corresponding author for this work

Materials Science and Engineering

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

8 Scopus citations

Abstract

The manganese-based layered oxides as a promising cathode material for potassium ion batteries (PIBs) have attracted considerable interest owing to their simple synthesis, high specific capacity, and low cost. However, due to the irreversible phase transition and the Jahn–Teller distortion of the Mn3+, its application in potassium ion batteries is limited, leading to slow potassium ion kinetics and severe capacity attenuation. Here, entropy-tuning by changing the content of cathode material composition is proposed to address the above challenges. Compared to low and high entropy variants of K0.45MnxCo(1-x)/4Mg(1-x)/4Cu(1-x)/4Ti(1-x)/4O2, where x = 0.8, 0.6, and 0.4, the medium entropy K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 shows more balanced electrochemical properties in the PIBs. Benefiting from entropy-tuned suppression of the Jahn–Teller distortion of the Mn3+, the K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 can achieve a high K+ ion transport rate and alleviated volume variation while retaining high specific capacity. Accordingly, the medium entropy K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 cathode in the full cell exhibits a high capacity of 100 mAh g−1 at 50 mA g−1, delivers superior rate capability (65.8 mAh g−1 at 500 mA g−1) and cycling stability (67.8 mAh g−1 after 350 cycles at 100 mA g−1). The entropy-tuning strategy is expected to open new avenues in designing PIB cathode materials and beyond.

Original language	English
Journal	Small Methods
DOIs	https://doi.org/10.1002/smtd.202300893
State	Published - 15 Sep 2023

Access to Document

10.1002/smtd.202300893

https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/smtd.202300893

Cite this

@article{fea8a5de781b4818a1659bc69b50429d,

title = "Entropy‐Tuned Layered Oxide Cathodes for Potassium‐Ion Batteries",

abstract = "The manganese-based layered oxides as a promising cathode material for potassium ion batteries (PIBs) have attracted considerable interest owing to their simple synthesis, high specific capacity, and low cost. However, due to the irreversible phase transition and the Jahn–Teller distortion of the Mn3+, its application in potassium ion batteries is limited, leading to slow potassium ion kinetics and severe capacity attenuation. Here, entropy-tuning by changing the content of cathode material composition is proposed to address the above challenges. Compared to low and high entropy variants of K0.45MnxCo(1-x)/4Mg(1-x)/4Cu(1-x)/4Ti(1-x)/4O2, where x = 0.8, 0.6, and 0.4, the medium entropy K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 shows more balanced electrochemical properties in the PIBs. Benefiting from entropy-tuned suppression of the Jahn–Teller distortion of the Mn3+, the K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 can achieve a high K+ ion transport rate and alleviated volume variation while retaining high specific capacity. Accordingly, the medium entropy K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 cathode in the full cell exhibits a high capacity of 100 mAh g−1 at 50 mA g−1, delivers superior rate capability (65.8 mAh g−1 at 500 mA g−1) and cycling stability (67.8 mAh g−1 after 350 cycles at 100 mA g−1). The entropy-tuning strategy is expected to open new avenues in designing PIB cathode materials and beyond.",

author = "Shu Li and Lichen Wu and Hongwei Fu and Rao, {Apparao M.} and Limei Cha and Jiang Zhou and Bingan Lu",

year = "2023",

month = sep,

day = "15",

doi = "10.1002/smtd.202300893",

language = "英语",

journal = "Small Methods",

issn = "2366-9608",

publisher = "John Wiley and Sons Ltd",

}

TY - JOUR

T1 - Entropy‐Tuned Layered Oxide Cathodes for Potassium‐Ion Batteries

AU - Li, Shu

AU - Wu, Lichen

AU - Fu, Hongwei

AU - Rao, Apparao M.

AU - Cha, Limei

AU - Zhou, Jiang

AU - Lu, Bingan

PY - 2023/9/15

Y1 - 2023/9/15

N2 - The manganese-based layered oxides as a promising cathode material for potassium ion batteries (PIBs) have attracted considerable interest owing to their simple synthesis, high specific capacity, and low cost. However, due to the irreversible phase transition and the Jahn–Teller distortion of the Mn3+, its application in potassium ion batteries is limited, leading to slow potassium ion kinetics and severe capacity attenuation. Here, entropy-tuning by changing the content of cathode material composition is proposed to address the above challenges. Compared to low and high entropy variants of K0.45MnxCo(1-x)/4Mg(1-x)/4Cu(1-x)/4Ti(1-x)/4O2, where x = 0.8, 0.6, and 0.4, the medium entropy K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 shows more balanced electrochemical properties in the PIBs. Benefiting from entropy-tuned suppression of the Jahn–Teller distortion of the Mn3+, the K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 can achieve a high K+ ion transport rate and alleviated volume variation while retaining high specific capacity. Accordingly, the medium entropy K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 cathode in the full cell exhibits a high capacity of 100 mAh g−1 at 50 mA g−1, delivers superior rate capability (65.8 mAh g−1 at 500 mA g−1) and cycling stability (67.8 mAh g−1 after 350 cycles at 100 mA g−1). The entropy-tuning strategy is expected to open new avenues in designing PIB cathode materials and beyond.

AB - The manganese-based layered oxides as a promising cathode material for potassium ion batteries (PIBs) have attracted considerable interest owing to their simple synthesis, high specific capacity, and low cost. However, due to the irreversible phase transition and the Jahn–Teller distortion of the Mn3+, its application in potassium ion batteries is limited, leading to slow potassium ion kinetics and severe capacity attenuation. Here, entropy-tuning by changing the content of cathode material composition is proposed to address the above challenges. Compared to low and high entropy variants of K0.45MnxCo(1-x)/4Mg(1-x)/4Cu(1-x)/4Ti(1-x)/4O2, where x = 0.8, 0.6, and 0.4, the medium entropy K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 shows more balanced electrochemical properties in the PIBs. Benefiting from entropy-tuned suppression of the Jahn–Teller distortion of the Mn3+, the K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 can achieve a high K+ ion transport rate and alleviated volume variation while retaining high specific capacity. Accordingly, the medium entropy K0.45Mn0.6Co0.1Mg0.1Cu0.1Ti0.1O2 cathode in the full cell exhibits a high capacity of 100 mAh g−1 at 50 mA g−1, delivers superior rate capability (65.8 mAh g−1 at 500 mA g−1) and cycling stability (67.8 mAh g−1 after 350 cycles at 100 mA g−1). The entropy-tuning strategy is expected to open new avenues in designing PIB cathode materials and beyond.

U2 - 10.1002/smtd.202300893

DO - 10.1002/smtd.202300893

M3 - 文章

SN - 2366-9608

JO - Small Methods

JF - Small Methods

ER -

Entropy‐Tuned Layered Oxide Cathodes for Potassium‐Ion Batteries

Abstract

Access to Document

Fingerprint

Cite this