P2-type layered high-entropy oxides as sodium-ion cathode materials
作者机构：Institute of NanotechnologyKarlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Helmholtz Institute Ulm(HIU)Electrochemical Energy StorageHelmholtzstrasse 1189081 UlmGermany Joint Research Laboratory Nanomaterials-Technische Universität Darmstadt and Karlsruhe Institute of Technology(KIT)Otto-Berndt-Strasse 364206 DarmstadtGermany Leibniz Institute for Solid State and Materials Research(IFW)DresdenHelmholtzstrasse 2001069 DresdenGermany INM-Leibniz Institute for New MaterialsCampus D2266123 SaarbrückenGermany Department for Materials Science and EngineeringSaarland UniversityCampus D2266123 SaarbrückenGermany SaareneSaarland Center for Energy Materials and SustainabilityCampus C4266123 SaarbrückenGermany Bavarian Center for Battery Technology(BayBatt)University of BayreuthUniversitätsstrasse 3095447 BayreuthGermany Department of ChemistryUniversity of BayreuthUniversitätsstrasse 3095447 BayreuthGermany
出 版 物：《Materials Futures》 (材料展望（英文）)
年 卷 期：2022年第1卷第3期
页 面：171-184页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：financial support from the China Scholarship Council(CSC) financial support by Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)under Germany’s Excellence Strategy,EXC 2154,project number 390874152 financial support from the Federal Ministry of Education and Research(Bundesministerium für Bildung und Forschung,BMBF)under the project‘KaSiLi’(03XP0254D)in the competence cluster‘Excell-BattMat’ financial support from the Helmholtz Association(DigiBat project) support by the German Research Foundation(to H H,Grant No.HA 1344/43-1)is gratefully acknowledged support from EnABLES and EPISTORE,projects funded by the European Union’s Horizon 2020 research and innovation program under Grant Agreement No.730957 and 101017709,respectively funding from the Kera-Solar project(Carl Zeiss Foundation) support at beamline P65 of the PETRA Ⅲ synchrotron(Deutsches Elektronen-Synchrotron DESY,Hamburg,Germany)is gratefully acknowledged Eduard Arzt(INM)for his continuing support Andrea Jung(INM)for her support on ICP-OES measurements the support from the Karlsruhe Nano Micro Facility(KNMF,www.knmf.kit.edu),a Helmholtz research infrastructure at Karlsruhe Institute of Technology(KIT,www.kit.du)
主 题：P2-type layered cathode high-entropy oxides sodium-ion battery gassing behavior manganese leaching
摘 要：P2-type layered oxides with the general Na-deficient composition Na_(x)TMO_(2)(x1,TM:transition metal)are a promising class of cathode materials for sodium-ion *** open Na+transport pathways present in the structure lead to low diffusion barriers and enable high charge/discharge ***,a phase transition from P2 to O2 structure occurring above 4.2 V and metal dissolution at low potentials upon discharge results in rapid capacity *** this work,we demonstrate the positive effect of configurational entropy on the stability of the crystal structure during battery *** different compositions of layered P2-type oxides were synthesized by solid-state chemistry,Na_(0.67)(Mn_(0.55)Ni_(0.21)Co_(0.24))O_(2),Na_(0.67)(Mn_(0.45)Ni_(0.18)Co_(0.24)Ti_(0.1)Mg_(0.03))O_(2) and Na_(0.67)(Mn_(0.45)Ni_(0.18)Co_(0.18)Ti_(0.1)Mg_(0.03)Al_(0.04)Fe_(0.02))O_(2) with low,medium and high configurational entropy,*** high-entropy cathode material shows lower structural transformation and Mn dissolution upon cycling in a wide voltage range from 1.5 to 4.6 *** operando techniques and post-mortem analysis were used to probe the underlying reaction mechanism ***,the high-entropy strategy is a promising route for improving the electrochemical performance of P2 layered oxide cathodes for advanced sodium-ion battery applications.
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