MgO coated P2-Na0.67Mn0.75Ni0.25O2 layered oxide cathode for Na-Ion batteries

被引：4
|
作者：
Gauckler, Cornelius [1 ]
Kucinskis, Gints [1 ,2 ]
Pfeiffer, Lukas Fridolin [1 ]
Abd-El-Latif, Abdelaziz A. [1 ]
Tang, Yushu [4 ,5 ]
Kuebel, Christian [3 ,4 ,5 ]
Maroni, Fabio [1 ]
Gong, Ruihao [1 ]
Wohlfahrt-Mehrens, Margret [1 ,3 ]
Axmann, Peter [1 ]
Marinaro, Mario [1 ]
机构：
[1] Zent Sonnenener & Wasserstoff Forsch Baden Wurtte, Helmholtzstr 8, D-89081 Ulm, Germany
[2] Univ Latvia, Inst Solid State Phys, Kengaraga St 8, LV-1063 Riga, Latvia
[3] Helmholtz Inst Ulm HIU Electrochem Energy Storage, Helmholtz Str 11, D-89081 Ulm, Germany
[4] Karlsruhe Inst Technol KIT, Inst Nanotechnol INT, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
[5] Karlsruhe Inst Technol KIT, Karlsruhe Nano Micro Facil KNMFi, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
来源：
JOURNAL OF POWER SOURCES ADVANCES | 2024年 / 25卷
关键词：
Coating; Layered oxide; Magnesium; Batteries; Sodium; OXYGEN REDOX CHEMISTRY; HIGH-VOLTAGE CATHODE; ANIONIC REDOX; SODIUM; LI; PERFORMANCE; CO; MECHANISM; INSIGHTS;
D O I：
10.1016/j.powera.2024.100135
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：
In this study, we propose an effective strategy to improve the electrochemical performance of a P2-Na0.67Mn0.75Ni0.25O2 (P2-MNO) cathode material for Na -ion batteries based on MgO surface coating. The MgO coating, with a thickness of similar to 20-50 nm, is obtained by means of a facile wet-chemistry approach followed by heat treatment carried out at comparatively low temperatures (400-500 degrees C) in order to avoid possible Mg doping in the bulk of the P2-MNO. Detailed electrochemical investigations demonstrate improved electrochemical performance of the MgO-coated material (M-P2-MNO) in comparison to pristine bare one at both room and elevated (40 degrees C) temperatures. Operando differential electrochemical mass spectroscopy (DEMS) demonstrate that the MgO coating is effective in suppressing unwanted gas evolution due to side reactions thus stabilizing the cathode/electrolyte interface.
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页数：8
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