High-Voltage Potassium Hexacyanoferrate Cathode via High-Entropy and Potassium Incorporation for Stable Sodium-Ion BatteriesClick to copy article linkArticle link copied!
- Junyi DaiJunyi DaiHefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui, ChinaMore by Junyi Dai
- Sha TanSha TanChemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United StatesMore by Sha Tan
- Lifeng WangLifeng WangHefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui, ChinaMore by Lifeng Wang
- Fangxin LingFangxin LingHefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui, ChinaMore by Fangxin Ling
- Fuqiang DuanFuqiang DuanCollege of Aerospace Science and Engineering, National University of Defense Technology, Chang Sha 410073, Hunan, ChinaMore by Fuqiang Duan
- Mingze MaMingze MaHefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui, ChinaMore by Mingze Ma
- Yu Shao
- Xianhong RuiXianhong RuiSchool of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, ChinaMore by Xianhong Rui
- Yu YaoYu YaoHefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui, ChinaMore by Yu Yao
- Enyuan HuEnyuan HuChemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United StatesMore by Enyuan Hu
- Xiaojun WuXiaojun WuHefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui, ChinaMore by Xiaojun Wu
- Chunyang Li*Chunyang Li*E-mail: [email protected]Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui, ChinaMore by Chunyang Li
- Yan Yu*Yan Yu*Email: [email protected]Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui, ChinaNational Synchrotron Radiation Laboratory, Hefei, Anhui 230026, ChinaMore by Yan Yu
Abstract
Prussian blue analogues (PBAs) used as sodium ion battery (SIB) cathodes are usually the focus of attention due to their three-dimensional open frame and high theoretical capacity. Nonetheless, the disadvantages of a low working voltage and inferior structural stability of PBAs prevent their further applications. Herein, we propose constructing the Kx(MnFeCoNiCu)[Fe(CN)6] (HE-K-PBA) cathode by high-entropy and potassium incorporation strategy to simultaneously realize high working voltage and cycling stability. The reaction mechanism of metal cations in HE-K-PBA are revealed by synchrotron radiation X-ray absorption spectroscopy (XAS), ex situ X-ray photoelectron spectroscopy (XPS), and in situ Raman spectra. We also investigate the entropy stabilization mechanism via finite element simulation, demonstrating that HE-K-PBA with small von Mises stress and weak structure strain can significantly mitigate the structural distortion. Benefit from the stable structure and everlasting K+ (de)intercalation, the HE-K-PBA delivers high output voltage (3.46 V), good reversible capacity (120.5 mAh g–1 at 0.01 A g–1), and capacity retention of 90.4% after 1700 cycles at 1.0 A g–1. Moreover, the assembled full cell and all-solid-state batteries with a stable median voltage of 3.29 V over 3000 cycles further demonstrate the application prospects of the HE-K-PBA cathode.
Cited By
This article is cited by 2 publications.
- Xiaoying Zhao, Ningbo Liu, Mengxian Zheng, Xiaohan Wang, Yinuo Xu, Jingwei Liu, Fujun Li, Liubin Wang. Four-Electron Redox Reaction in Prussian Blue Analogue Cathode Material for High-Performance Sodium-Ion Batteries. ACS Energy Letters 2024, 9
(6)
, 2748-2757. https://doi.org/10.1021/acsenergylett.4c00976
- Zinan Wang, Moulay Tahar Sougrati, Qiong Zheng, Rile Ge, Junhu Wang. Capacitive-Controlled Prussian White with a Nickel Iron Hexacyanoferrate Composite Cathode for Rapid Sodium Diffusion. ACS Applied Materials & Interfaces 2024, 16
(15)
, 18908-18917. https://doi.org/10.1021/acsami.4c00885
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