DataVXAdvanced MaterialsPaper
journal article·2024-06

Fast Na+ Kinetics and Suppressed Voltage Hysteresis Enabled by a High‐Entropy Strategy for Sodium Oxide Cathodes

Xian‐Zuo Wang, Yuting Zuo, Yuanbin Qin, Xu Zhu, Shao‐Wen Xu, Yu‐Jie Guo, Tianran Yan, Liang Zhang, Zhibin Gao, Lianzheng Yu, Mengting Liu, Ya‐Xia Yin, Yonghong Cheng, Peng‐Fei Wang, Yu‐Guo Guo

Advanced Materials· Volume 36· Issue 24
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Source abstract

Abstract

Abstract O3‐type layered transition metal cathodes are promising energy storage materials due to their sufficient sodium reservoir. However, sluggish sodium ions kinetics and large voltage hysteresis, which are generally associated with Na+ diffusion properties and electrochemical phase transition reversibility, drastically minimize energy density, reduce energy efficiency, and hinder further commercialization of sodium‐ion batteries (SIBs). Here, this work proposes a high‐entropy tailoring strategy through manipulating the electronic local environment within transition metal slabs to circumvent these issues. Experimental analysis combined with theoretical calculations verify that high‐entropy metal ion mixing contributes to the improved reversibility of redox reaction and O3–P3–O3 phase transition behaviors as well as the enhanced Na+ diffusivity. Consequently, the designed O3‐Na0.9Ni0.2Fe0.2Co0.2Mn0.2Ti0.15Cu0.05O2 material with high‐entropy characteristic could display a negligible voltage hysteresis (<0.09 V), impressive rate capability (98.6 mAh g−1 at 10 C) and long‐term cycling stability (79.4% capacity retention over 2000 cycles at 5 C). This work provides insightful guidance in mitigating the voltage hysteresis and facilitating Na+ diffusion of layered oxide cathode materials to realize high‐rate and high‐energy SIBs.
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Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center of Nanomaterials for Renewable Energy State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 P. R. China

State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 P. R. China

Center for Advancing Materials Performance from the Nanoscale (CAMP‐Nano) State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an Shaanxi 710049 P. R. China

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular Sciences Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China

School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 P. R. China

Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University Suzhou Jiangsu 215123 P. R. China

Jiangsu Jufeng New Energy Technology Co. Ltd. Changzhou Jiangsu 213166 P. R. China

Funding

National Natural Science Foundation of China · State Key Laboratory of Electrical Insulation and Power Equipment

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