Resolving the Role of Configurational Entropy in Improving Cycling Performance of Multicomponent Hexacyanoferrate Cathodes for Sodium-Ion Batteries

被引：109

作者：

Ma, Yanjiao ^{[1
]}

Hu, Yang ^{[2
]}

Pramudya, Yohanes ^{[1
]}

Diemant, Thomas ^{[2
]}

Wang, Qingsong ^{[1
]}

Goonetilleke, Damian ^{[1
]}

Tang, Yushu ^{[1
]}

Zhou, Bei ^{[1
]}

Hahn, Horst ^{[1
,2
,3
,4
]}

Wenzel, Wolfgang ^{[1
]}

Fichtner, Maximilian ^{[1
,2
]}

Ma, Yuan ^{[1
]}

Breitung, Ben ^{[1
]}

Brezesinski, Torsten ^{[1
]}

机构：

[1] Karlsruhe Inst Technol KIT, Inst Nanotechnol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[2] Helmholtz Inst Ulm HIU Electrochem Energy Storage, Helmholtzstr 11, D-89081 Ulm, Germany

[3] Tech Univ Darmstadt, Joint Res Lab Nanomat, Otto Berndt Str 3, D-64206 Darmstadt, Germany

[4] Karlsruhe Inst Technol KIT, Otto Berndt Str 3, D-64206 Darmstadt, Germany

来源：

ADVANCED FUNCTIONAL MATERIALS | 2022年 / 32卷 / 34期

关键词：

high-entropy materials; manganese-based hexacyanoferrates; phase transitions; secondary batteries; sodium-ion cathodes; PRUSSIAN BLUE ANALOGS; ELECTROCHEMICAL PROPERTIES; STORAGE; FE; SPECTROSCOPY; POTASSIUM; MECHANISM; OXIDES; EDGE; MN;

D O I：

10.1002/adfm.202202372

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Mn-based hexacyanoferrate (Mn-HCF) cathodes for Na-ion batteries usually suffer from poor reversibility and capacity decay resulting from unfavorable phase transitions and structural degradation during cycling. To address this issue, the high-entropy concept is here applied to Mn-HCF materials, significantly improving the sodium storage capabilities of this system via a solid-solution mechanism with minor crystallographic changes upon de-/sodiation. Complementary structural, electrochemical, and computational characterization methods are used to compare the behavior of high-, medium-, and low-entropy multicomponent Mn-HCFs resolving, to our knowledge for the first time, the link between configurational entropy/compositional disorder (entropy-mediated suppression of phase transitions, etc.) and cycling performance/stability in this promising class of next-generation cathode materials.

引用

页数：11

共 62 条

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