Achieving a superior Na storage performance of Fe-based Prussian blue cathode by coating perylene tetracarboxylic dianhydride amine  

作　　者：Xin-Yuan Fu Lu-Lu Zhang Zhao-Yao Chen Yunkai Xu Junxiu Wu Cheng-Cheng Wang Xiao-Kai Ding Xue-Lin Yang Jun Lu 

机构地区：[1]Hubei Provincial Collaborative Innovation Center for New Energy Microgrid,College of Electrical Engineering&New Energy,China Three Gorges University,Yichang,Hubei,China [2]College of Materials and Chemical Engineering,China Three Gorges University,Yichang,Hubei,China [3]College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,China

出　　处：《Carbon Energy》2024年第5期53-64,共12页碳能源（英文）

基　　金：National Key Research and Development Program of China,Grant/Award Number:2022YFB3807700;Hubei Natural Science Foundation Innovation Group Project,Grant/Award Number:2022CFA020;Joint Funds of the Hubei Natural Science Foundation Innovation and Development,Grant/Award Number:2022CFD034;Major Technological Innovation Project of Hubei Science and Technology Department,Grant/Award Number:2019AAA164;National Natural Science Foundation of China,Grant/Award Number:2022CFD034。

摘　　要：Fe-based Prussian blue(Fe-PB)cathode material shows great application potential in sodium(Na)-ion batteries due to its high theoretical capacity,long cycle life,low cost,and simple preparation process.However,the crystalline water and vacancies of Fe-PB lattice,the low electrical conductivity,and the dissolution of metal ions lead to limited capacity and poor cycling stability.In this work,a perylene tetracarboxylic dianhydride amine(PTCDA)coating layer is successfully fabricated on the surface of Fe-PB by a liquid-phase method.The aminated PTCDA(PTCA)coating not only increases the specific surface area and electronic conductivity but also effectively reduces the crystalline water and vacancies,which avoids the erosion of Fe-PB by electrolyte.Consequently,the PTCA layer reduces the charge transfer resistance,enhances the Na-ion diffusion coefficient,and improves the structure stability.The PTCA-coated Fe-PB exhibits superior Na storage performance with a first discharge capacity of 145.2 mAh g^(−1) at 100 mA g^(−1).Long cycling tests exhibit minimal capacity decay of 0.027%per cycle over 1000 cycles at 1 A g^(−1).Therefore,this PTCA coating strategy has shown promising competence in enhancing the electrochemical performance of Fe-PB,which can potentially serve as a universal electrode coating strategy for Na-ion batteries.

关 键 词：cathode material COATING Fe-based Prussian blue Na-ion batteries perylene tetracarboxylic dianhydride amine 

分 类 号：TM912[电气工程—电力电子与电力传动]