Tuning crystal structure and electronic properties for enhanced oxygen intercalation pseudocapacitance in perovskite

Yu Liu; Ziyang Zhu; Jiashun Wu; Zhenbin Wang; Hualiang Zhang; Yujie Xu; Xinjing Zhang; Haisheng Chen

doi:10.1016/j.xcrp.2024.101846

Tuning crystal structure and electronic properties for enhanced oxygen intercalation pseudocapacitance in perovskite

Yu Liu^*
, Ziyang Zhu
, Jiashun Wu
, Zhenbin Wang
, Hualiang Zhang
, Yujie Xu
, Xinjing Zhang
, Haisheng Chen^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

6 Citations (Scopus)

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Abstract

Oxygen intercalation supercapacitors with high specific capacitance and power density offer potential advantages in various applications. This study explores the potential of Ruddlesden-Popper (RP) perovskite materials for energy storage, focusing on oxygen intercalation pseudocapacitance properties. The RP structure significantly enhances oxygen intercalation pseudocapacitance by allowing interstitial oxygen intercalation, thereby overcoming limitations associated with oxygen vacancy concentration. Despite the weaker electronic conductivity and lower oxygen vacancy concentration observed in the RP structures, A-site deficiency effectively mitigates these drawbacks. La_0.7Sr_1.2Fe_0.9Co_0.1O₄ (rp-d-LSFC) exhibits a higher concentration of free electrons, leading to improved conductivity and oxygen vacancy concentrations. Consequently, rp-d-LSFC exhibits an excellent specific capacitance of 983.6 F g⁻¹ at 1 A g⁻¹. Additionally, an asymmetric supercapacitor cell achieves an impressive energy density of 40.8 Wh kg⁻¹ at a power density of 1,688.3 W kg⁻¹. Density functional theory calculations further support the above results. This work advances our understanding of oxygen intercalation pseudocapacitance mechanisms. © 2024 The Author(s)

Original language	English
Article number	101846
Number of pages	15
Journal	Cell Reports Physical Science
Volume	5
Issue number	3
Online published	28 Feb 2024
DOIs	https://doi.org/10.1016/j.xcrp.2024.101846
Publication status	Published - 20 Mar 2024

Funding

Y.L. acknowledges support by the National Natural Science Foundation of China under award number no. 52202324. This work is also supported by the Hundred Talents Program of the Chinese Academy of Sciences (CAS). The CAS Nanjing Future Energy System Research Institute independently deploys research project E3550101. Z.W. acknowledges the funding support from City University of Hong Kong Start-up Grant 9020004. The calculations were carried out using the computational facilities at CityU Burgundy, managed and provided by the Computing Service Centre at City University of Hong Kong. X.Z. is thankful for the support from Beijing Natural Science Foundation JQ21010.

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abstract = "Oxygen intercalation supercapacitors with high specific capacitance and power density offer potential advantages in various applications. This study explores the potential of Ruddlesden-Popper (RP) perovskite materials for energy storage, focusing on oxygen intercalation pseudocapacitance properties. The RP structure significantly enhances oxygen intercalation pseudocapacitance by allowing interstitial oxygen intercalation, thereby overcoming limitations associated with oxygen vacancy concentration. Despite the weaker electronic conductivity and lower oxygen vacancy concentration observed in the RP structures, A-site deficiency effectively mitigates these drawbacks. La0.7Sr1.2Fe0.9Co0.1O4 (rp-d-LSFC) exhibits a higher concentration of free electrons, leading to improved conductivity and oxygen vacancy concentrations. Consequently, rp-d-LSFC exhibits an excellent specific capacitance of 983.6 F g−1 at 1 A g−1. Additionally, an asymmetric supercapacitor cell achieves an impressive energy density of 40.8 Wh kg−1 at a power density of 1,688.3 W kg−1. Density functional theory calculations further support the above results. This work advances our understanding of oxygen intercalation pseudocapacitance mechanisms. {\textcopyright} 2024 The Author(s)",

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AU - Liu, Yu

AU - Zhu, Ziyang

AU - Wu, Jiashun

AU - Wang, Zhenbin

AU - Zhang, Hualiang

AU - Xu, Yujie

AU - Zhang, Xinjing

AU - Chen, Haisheng

PY - 2024/3/20

Y1 - 2024/3/20

N2 - Oxygen intercalation supercapacitors with high specific capacitance and power density offer potential advantages in various applications. This study explores the potential of Ruddlesden-Popper (RP) perovskite materials for energy storage, focusing on oxygen intercalation pseudocapacitance properties. The RP structure significantly enhances oxygen intercalation pseudocapacitance by allowing interstitial oxygen intercalation, thereby overcoming limitations associated with oxygen vacancy concentration. Despite the weaker electronic conductivity and lower oxygen vacancy concentration observed in the RP structures, A-site deficiency effectively mitigates these drawbacks. La0.7Sr1.2Fe0.9Co0.1O4 (rp-d-LSFC) exhibits a higher concentration of free electrons, leading to improved conductivity and oxygen vacancy concentrations. Consequently, rp-d-LSFC exhibits an excellent specific capacitance of 983.6 F g−1 at 1 A g−1. Additionally, an asymmetric supercapacitor cell achieves an impressive energy density of 40.8 Wh kg−1 at a power density of 1,688.3 W kg−1. Density functional theory calculations further support the above results. This work advances our understanding of oxygen intercalation pseudocapacitance mechanisms. © 2024 The Author(s)

AB - Oxygen intercalation supercapacitors with high specific capacitance and power density offer potential advantages in various applications. This study explores the potential of Ruddlesden-Popper (RP) perovskite materials for energy storage, focusing on oxygen intercalation pseudocapacitance properties. The RP structure significantly enhances oxygen intercalation pseudocapacitance by allowing interstitial oxygen intercalation, thereby overcoming limitations associated with oxygen vacancy concentration. Despite the weaker electronic conductivity and lower oxygen vacancy concentration observed in the RP structures, A-site deficiency effectively mitigates these drawbacks. La0.7Sr1.2Fe0.9Co0.1O4 (rp-d-LSFC) exhibits a higher concentration of free electrons, leading to improved conductivity and oxygen vacancy concentrations. Consequently, rp-d-LSFC exhibits an excellent specific capacitance of 983.6 F g−1 at 1 A g−1. Additionally, an asymmetric supercapacitor cell achieves an impressive energy density of 40.8 Wh kg−1 at a power density of 1,688.3 W kg−1. Density functional theory calculations further support the above results. This work advances our understanding of oxygen intercalation pseudocapacitance mechanisms. © 2024 The Author(s)

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DO - 10.1016/j.xcrp.2024.101846

M3 - RGC 21 - Publication in refereed journal

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JO - Cell Reports Physical Science

JF - Cell Reports Physical Science

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M1 - 101846

ER -

Tuning crystal structure and electronic properties for enhanced oxygen intercalation pseudocapacitance in perovskite

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Tuning crystal structure and electronic properties for enhanced oxygen intercalation pseudocapacitance in perovskite

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