A Conformal Protective Skin Producing Stable Cathode-Electrolyte Interface for Long-Life Potassium-Ion Batteries

Yan Huang; Xinyuan Zhang; Nan Chen; Ruiyuan Tian; Yi Zeng; Fei Du

doi:10.1002/smll.202302841

A Conformal Protective Skin Producing Stable Cathode-Electrolyte Interface for Long-Life Potassium-Ion Batteries

Yan Huang, Xinyuan Zhang, Nan Chen, Ruiyuan Tian, Yi Zeng, Fei Du

Jilin University

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

8 Scopus citations

Abstract

The development of K-based layered oxide cathodes is essential for boosting the competitiveness of potassium-ion batteries (PIBs) in grid-scale energy storage. However, their service life is dramatically limited by interfacial instability issues, which is still poorly understood. In this work, amorphous FePO₄ (a-FP) is built on K_0.5Ni_0.1Mn_0.9O₂ (KNMO) as the protective skin, whose elasticity for strain relaxation and the K-conducting nature guarantee its integrity during fast and constant K-ion insertion/extraction. The conformal coating leads to a robust interphase on the cathode surface, which qualifies excellent K-transport ability and significantly suppresses the mechanical cracking and transition metal dissolution. Breakthrough in cycle life of the K-based layered cathodes is therefore achieved, which of the amorphous FePO₄ coated K_0.5Ni_0.1Mn_0.9O₂ (KNMO@a-FP) reaches 2500 cycles. The insights gained from the surface protection layer construction and the in-depth analysis of its working mechanism pave the way for further development of K-based layered cathodes with both bulk structural and interfacial stability.

Original language	English
Article number	2302841
Journal	Small
Volume	19
Issue number	40
Early online date	1 Jun 2023
DOIs	https://doi.org/10.1002/smll.202302841
State	Published - 4 Oct 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Funding

Y.H. and X.Y.Z. contributed equally to this work. This work was supported by the National Natural Science Foundation of China with Grant No. 12274176, 51972142, and 52172145. The authors would like to thank the support from the Department of Science and Technology of Jilin Province with Grant No. 20220201118GX and 20210101059JC.

Funders	Funder number
National Natural Science Foundation of China	12274176, 52172145, 51972142
Department of Science and Technology of Jilin Province	20220201118GX, 20210101059JC

Keywords

K-ion batteries
cathode-electrolyte interface
conformal surface protection
cycling stability
layered cathode materials

Access to Document

10.1002/smll.202302841

Cite this

@article{3411ca8f74364944b53d163e7415a59a,

title = "A Conformal Protective Skin Producing Stable Cathode-Electrolyte Interface for Long-Life Potassium-Ion Batteries",

abstract = "The development of K-based layered oxide cathodes is essential for boosting the competitiveness of potassium-ion batteries (PIBs) in grid-scale energy storage. However, their service life is dramatically limited by interfacial instability issues, which is still poorly understood. In this work, amorphous FePO4 (a-FP) is built on K0.5Ni0.1Mn0.9O2 (KNMO) as the protective skin, whose elasticity for strain relaxation and the K-conducting nature guarantee its integrity during fast and constant K-ion insertion/extraction. The conformal coating leads to a robust interphase on the cathode surface, which qualifies excellent K-transport ability and significantly suppresses the mechanical cracking and transition metal dissolution. Breakthrough in cycle life of the K-based layered cathodes is therefore achieved, which of the amorphous FePO4 coated K0.5Ni0.1Mn0.9O2 (KNMO@a-FP) reaches 2500 cycles. The insights gained from the surface protection layer construction and the in-depth analysis of its working mechanism pave the way for further development of K-based layered cathodes with both bulk structural and interfacial stability.",

keywords = "K-ion batteries, cathode-electrolyte interface, conformal surface protection, cycling stability, layered cathode materials",

author = "Yan Huang and Xinyuan Zhang and Nan Chen and Ruiyuan Tian and Yi Zeng and Fei Du",

note = "Publisher Copyright: {\textcopyright} 2023 Wiley-VCH GmbH.",

year = "2023",

month = oct,

day = "4",

doi = "10.1002/smll.202302841",

language = "אנגלית",

volume = "19",

journal = "Small",

issn = "1613-6810",

publisher = "Wiley-VCH Verlag",

number = "40",

}

TY - JOUR

T1 - A Conformal Protective Skin Producing Stable Cathode-Electrolyte Interface for Long-Life Potassium-Ion Batteries

AU - Huang, Yan

AU - Zhang, Xinyuan

AU - Chen, Nan

AU - Tian, Ruiyuan

AU - Zeng, Yi

AU - Du, Fei

PY - 2023/10/4

Y1 - 2023/10/4

N2 - The development of K-based layered oxide cathodes is essential for boosting the competitiveness of potassium-ion batteries (PIBs) in grid-scale energy storage. However, their service life is dramatically limited by interfacial instability issues, which is still poorly understood. In this work, amorphous FePO4 (a-FP) is built on K0.5Ni0.1Mn0.9O2 (KNMO) as the protective skin, whose elasticity for strain relaxation and the K-conducting nature guarantee its integrity during fast and constant K-ion insertion/extraction. The conformal coating leads to a robust interphase on the cathode surface, which qualifies excellent K-transport ability and significantly suppresses the mechanical cracking and transition metal dissolution. Breakthrough in cycle life of the K-based layered cathodes is therefore achieved, which of the amorphous FePO4 coated K0.5Ni0.1Mn0.9O2 (KNMO@a-FP) reaches 2500 cycles. The insights gained from the surface protection layer construction and the in-depth analysis of its working mechanism pave the way for further development of K-based layered cathodes with both bulk structural and interfacial stability.

AB - The development of K-based layered oxide cathodes is essential for boosting the competitiveness of potassium-ion batteries (PIBs) in grid-scale energy storage. However, their service life is dramatically limited by interfacial instability issues, which is still poorly understood. In this work, amorphous FePO4 (a-FP) is built on K0.5Ni0.1Mn0.9O2 (KNMO) as the protective skin, whose elasticity for strain relaxation and the K-conducting nature guarantee its integrity during fast and constant K-ion insertion/extraction. The conformal coating leads to a robust interphase on the cathode surface, which qualifies excellent K-transport ability and significantly suppresses the mechanical cracking and transition metal dissolution. Breakthrough in cycle life of the K-based layered cathodes is therefore achieved, which of the amorphous FePO4 coated K0.5Ni0.1Mn0.9O2 (KNMO@a-FP) reaches 2500 cycles. The insights gained from the surface protection layer construction and the in-depth analysis of its working mechanism pave the way for further development of K-based layered cathodes with both bulk structural and interfacial stability.

KW - K-ion batteries

KW - cathode-electrolyte interface

KW - conformal surface protection

KW - cycling stability

KW - layered cathode materials

UR - http://www.scopus.com/inward/record.url?scp=85160779670&partnerID=8YFLogxK

U2 - 10.1002/smll.202302841

DO - 10.1002/smll.202302841

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

C2 - 37263988

AN - SCOPUS:85160779670

SN - 1613-6810

VL - 19

JO - Small

JF - Small

IS - 40

M1 - 2302841

ER -

A Conformal Protective Skin Producing Stable Cathode-Electrolyte Interface for Long-Life Potassium-Ion Batteries

Abstract

Bibliographical note

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this