Depolarization of Li-rich Mn-based oxide via electrochemically active Prussian blue interface providing superior rate capability

被引：57

作者：

Hao, Youchen ^{[1
,2
]}

Li, Xifei ^{[1
,2
]}

Liu, Wen ^{[1
,2
]}

Wang, Jingjing ^{[1
,2
]}

Shan, Hui ^{[1
,2
]}

Li, Wenbin ^{[1
,2
]}

Liu, Xingjiang ^{[3
]}

Lin, Liangxu ^{[4
]}

Wang, Xianyou ^{[5
]}

Sun, Xueliang ^{[6
]}

机构：

[1] Xian Univ Technol, Inst Adv Electrochem Energy, Xian Key Lab New Energy Mat & Devices, Shaanxi Int Joint Res Ctr Surface Technol Energy, Xian 710048, Peoples R China

[2] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China

[3] Tianjin Inst Power Sources, Sci & Technol Power Sources Lab, Tianjin 300384, Peoples R China

[4] Fujian Normal Univ, Strait Inst Flexible Elect SIFE, Future Technol, Fuzhou 350017, Fujian, Peoples R China

[5] Xiangtan Univ, Sch Chem, Key Lab Environ Friendly Chem & Applicat, Minist Educ, Xiangtan, Hunan, Peoples R China

[6] Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada

来源：

CARBON ENERGY | 2023年 / 5卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Li-rich Mn-based oxide; Prussian blue coating layer; synchronous redox; high-rate cyclability; METAL-ORGANIC FRAMEWORKS; CATHODE MATERIALS; RECENT PROGRESS; VOLTAGE DECAY;

D O I：

10.1002/cey2.272

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The high-rate cyclability of Li-rich Mn-based oxide (LMO) is highly limited by the electrochemical polarization resulting from the slow kinetic of the Li2MnO3 phase. Herein, the Prussian blue (PB) coating layer with specific redox potential is introduced as a functionalized interface to overcome the side effect and the escaping of O on the surface of LMO, especially its poor rate capability. In detail, the PB layer can restrict the large polarization of LMO by sharing overloaded current at a high rate due to the synchronous redox of PB and LMO. Consequently, an enhanced high rate performance with capacity retention of 87.8% over 300 cycles is obtained, which is superior to 50.5% of the pristine electrode. Such strategies on the high-rate cyclability of Li-rich Mn-based oxide compatible with good low-rate performances may attract great attention for pursuing durable performances.

引用

页数：9

共 32 条

[1] Potential of Metal-Organic Frameworks for Separation of Xenon and Krypton [J].