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Molybdenum-Incorporated O3-type Sodium Layered Oxide Cathodes for High-Performance Sodium-Ion Batteries
Energy Technology ( IF 3.6 ) Pub Date : 2023-08-09 , DOI: 10.1002/ente.202300437
Buzaina Moossa 1, 2 , Jeffin James Abraham 2 , R. A. Harindi Gayara 3 , Abdul Moiz Ahmed 4 , Rana Faisal Shahzad 5 , Ramazan Kahraman 1 , Siham Al-Qaradawi 6 , Shahid Rasul 5 , R. A. Shakoor 2
Energy Technology ( IF 3.6 ) Pub Date : 2023-08-09 , DOI: 10.1002/ente.202300437
Buzaina Moossa 1, 2 , Jeffin James Abraham 2 , R. A. Harindi Gayara 3 , Abdul Moiz Ahmed 4 , Rana Faisal Shahzad 5 , Ramazan Kahraman 1 , Siham Al-Qaradawi 6 , Shahid Rasul 5 , R. A. Shakoor 2
Affiliation
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Transition metal layered oxide materials with a general formula NaxMO2 (M = Ni, Mn, Co, Fe) are widely researched with various possible electrode configurations. Herein, O3-type NaNi(1−x)/2Mn(1−x)/2MoxO2 (x = 0, 0.05,0.1) layered oxide cathode materials are synthesized by solid-state reaction method, and its structural, thermal, and electrochemical performance in sodium ion battery is investigated. The structural analysis reveals that a single phase highly crystalline O3-type cathode material with an irregular particle shape is formed. The introduction of molybdenum improves the thermal stability of cathode materials, which can be attributed to the improved TMO2 layers that provide stability to the material. The addition of Mo to Na-layered oxide cathode materials enhances electrochemical performance. The developed cathode materials, the NaNi0.475Mn0.475Mo0.05O2, exhibit excellent specific discharge capacity (≈154 mAh g−1) at C/20 rate, (an increase of ≈20% when compared to the NaNi0.5Mn0.5O2) which can be attributed to the increased capacitance effect by the addition of Mo. The electrochemical impedance spectroscopy study reveals that the diffusion of Na+ into/from the host structure is rapid during the first cycle and then gradually reduces with subsequent cycling due to the formation of the solid electrolyte interface layer, which hinders Na+ migration. This has a potential effect on the improved electrochemical performance of the material.
中文翻译：
用于高性能钠离子电池的掺钼 O3 型钠层状氧化物阴极
具有通式Na x MO 2 (M = Ni、Mn、Co、Fe)的过渡金属层状氧化物材料被广泛研究，具有各种可能的电极配置。本文采用固相反应法合成了O3型NaNi ( 1− x ) /2Mn ( 1− x )/ 2MoxO 2 ( x =0,0.05,0.1)层状氧化物正极材料，并对其结构进行了表征。研究了钠离子电池的热性能和电化学性能。结构分析表明，形成了具有不规则颗粒形状的单相高结晶O3型正极材料。钼的引入提高了正极材料的热稳定性，这可归因于改进的TMO 2层为材料提供了稳定性。在Na层状氧化物正极材料中添加Mo可增强电化学性能。所开发的正极材料NaNi 0.475 Mn 0.475 Mo 0.05 O 2在C/20倍率下表现出优异的比放电容量（约154 mAh g -1）（与NaNi 0.5 Mn 0.5 O相比增加约20%） 2）这可以归因于添加Mo增加的电容效应。电化学阻抗谱研究表明，Na+扩散到主体结构中/从主体结构中扩散在第一个循环中是快速的，然后随着随后的循环逐渐减少，因为固体电解质界面层的形成阻碍了Na+的迁移。这对改善材料的电化学性能具有潜在影响。
更新日期：2023-08-09
中文翻译：
用于高性能钠离子电池的掺钼 O3 型钠层状氧化物阴极
具有通式Na x MO 2 (M = Ni、Mn、Co、Fe)的过渡金属层状氧化物材料被广泛研究，具有各种可能的电极配置。本文采用固相反应法合成了O3型NaNi ( 1− x ) /2Mn ( 1− x )/ 2MoxO 2 ( x =0,0.05,0.1)层状氧化物正极材料，并对其结构进行了表征。研究了钠离子电池的热性能和电化学性能。结构分析表明，形成了具有不规则颗粒形状的单相高结晶O3型正极材料。钼的引入提高了正极材料的热稳定性，这可归因于改进的TMO 2层为材料提供了稳定性。在Na层状氧化物正极材料中添加Mo可增强电化学性能。所开发的正极材料NaNi 0.475 Mn 0.475 Mo 0.05 O 2在C/20倍率下表现出优异的比放电容量（约154 mAh g -1）（与NaNi 0.5 Mn 0.5 O相比增加约20%） 2）这可以归因于添加Mo增加的电容效应。电化学阻抗谱研究表明，Na+扩散到主体结构中/从主体结构中扩散在第一个循环中是快速的，然后随着随后的循环逐渐减少，因为固体电解质界面层的形成阻碍了Na+的迁移。这对改善材料的电化学性能具有潜在影响。
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