Enabling nickel ferrocyanide nanoparticles for highperformance ammonium ion storage
作者机构：MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and StorageSchool of Chemistry and Chemical EngineeringState Key Lab of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150001China School of Materials Science and Chemical EngineeringNingbo UniversityNingbo 315211China
出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)
年 卷 期：2023年第17卷第2期
页 面：226-235页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
基 金：NSAF joint Fund(Grant No.U1830106) National Natural Science Foundation of China(Grant No.U1632114) Science and Technology Innovation 2025 Major Program of Ningbo(Grant No.2018B10061) K.C.Wong Magna Fund in Ningbo University.
主 题：nickel ferrocyanides NH_(4)^(+) electrochemistry Prussian blue aqueous ammonium ion batteries
摘 要：Prussian blue and its analogs are extensively investigated as a cathode for ammonium-ion batteries.However,they often suffer from poor electronic conductivity.Here,we report a Ni_(2)Fe(CN)_(6)/multiwalled carbon nanotube composite electrode material,which is prepared using a simple coprecipitation approach.The obtained material consists of nanoparticles with sizes 30-50 nm and the multiwalled carbon nanotube embedded in it.The existence of multiwalled carbon nanotube ensures that the Ni_(2)Fe(CN)_(6)/multiwalled carbon nanotube composite shows excellent electrochemical performance,achieving a discharge capacity of 55.1 mAh·g^(-1)at 1 C and 43.2 mAh·g^(-1)even at 15 C.An increase in the ammoniumion diffusion coefficient and ionic/electron conductivity based on kinetic investigations accounts for their high performance.Furthermore,detailed ex situ characterizations demonstrate that Ni_(2)Fe(CN)_(6)/multiwalled carbon nanotube composite offers three advantages:negligible lattice expansion during cycling,stable structure,and the reversible redox couple.Therefore,the Ni_(2)Fe(CN)_(6)/multiwalled carbon nanotube composite presents a long cycling life and high rate capacity.Finally,our study reports a desirable material for ammonium-ion batteries and provides a practical approach for improving the electrochemical performance of Prussian blue and its analogs.
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