Pillar effect boosting the electrochemical stability of Prussian bluepolypyrrole for potassium ion batteries

作     者：Mengmeng Zhou Xiaomeng Tian Ying Sun Xiaojun He Hui Li Tianyi Ma Qin Zhao Jieshan Qiu Mengmeng Zhou;Xiaomeng Tian;Ying Sun;Xiaojun He;Hui Li;Tianyi Ma;Qin Zhao;Jieshan Qiu

作者机构：Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceInstitute of Clean Energy ChemistryCollege of ChemistryLiaoning UniversityShenyang 110036China Anhui Key Laboratory of Coal Clean Conversion and High Valued UtilizationKey Laboratory of Metallurgical Emission Reduction&Resources Recycling Ministry of EducationSchool of Chemistry and Chemical EngineeringAnhui University of TechnologyMaanshan 243002China School of ScienceRMIT UniversityMelbourne VIC 3000Australia State Key Laboratory of Chemical Resource EngineeringCollege of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第5期

页      面：6326-6333页

核心收录：

学科分类：0808[工学-电气工程] 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] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Nos.22109060,52071171,and 52202248) the 2021 Annual Scientific Research Funding Project of the Educational Department of Liaoning Province(No.LJKZ0101) Liaoning BaiQianWan Talents Program(No.LNBQW2018B0048) Shenyang Science and Technology Project(No.21-108-9-04) Young Scientific and Technological Talents Project of the Department of Education of Liaoning Province(No.LQN202008) Anhui Province Key Laboratory of Coal Clean Conversion and High Valued Utilization,Anhui University of Technology(No.CHV22-05) Australian Research Council(ARC)through Future Fellowship(Nos.FT210100298 and FT210100806) Discovery Project(No.DP220100603) Linkage Project(No.LP210100467,LP210200504,and LP210200345) Industrial Transformation Training Centre(No.IC180100005)schemes,CSIRO Energy Centre and Kick-Start Project. 

主　　题：Prussian blue high-stability framework pillar effect potassium ion batteries polypyrrole 

摘      要：Due to the high theoretical capacity and electrode potential,Prussian blue is regarded as promising cathode material for potassium ion batteries.However,inferior structural stability,poor electronic conductivity,ambiguous energy storage mechanism have limited the application of Prussian blue materials.Herein,a highly stable Prussian blue-polypyrrole(PB-PPY)composite has been prepared by a facile one-step method.PB-PPY displays higher discharging capacity,better rate capacity,and longer cycling lifespan than that of pure Prussian blue in potassium ion batteries.The superior electrochemical performance can be attributed to the unique synthesis strategy to reduce the content of vacancies and crystal water in Prussian blue and enhance the conductivity.Furthermore,partial K ions have been evidenced that could remain in the Prussian blue framework,which contributes the long-term cycling stability.The K ions in the framework play the role of“pillarsto support the framework of Prussian blue and relieve the structural stress during the intercalation and de-intercalation of K ions.This work will reveal a new energy storage mechanism of Prussian blue and promote the design of high stability Prussian blue in the future.