High Na-content P2 and P2-O3 layered oxide cathodes for high performance Na-ion batteries

被引：8

作者：

Nair, Neeraja ^{[1
]}

Nair, Shantikumar, V ^{[1
]}

Baskar, Senthilkumar ^{[1
]}

机构：

[1] Amrita Vishwa Vidyapeetham, Amrita Inst, Med Sci Res Ctr, Sch Nanosci & Mol Med, Kochi 682041, Kerala, India

来源：

MATERIALS LETTERS | 2024年 / 354卷

关键词：

Na-ion batteries; Cathode; Capacity; Cationic potential; Dual doping;

D O I：

10.1016/j.matlet.2023.135397

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

P2-NaxTMO2, (x <= 0.67, TM-transition metal) oxides are promising cathode materials for Na-ion batteries, however they suffer from Na+-vacancy ordering and huge structural transformations (P2 -> O2 -> OP4). In contrast, high Na content in P2-type cathodes enables high structural stability and promotes active elements to their lower oxidation state and thereby achieving high capacity and cycling stability. Herein, light-weight elements boron and lithium doped in P2-type Na0.67Ni0.33Mn0.67O2 using cationic potential approach, aiming to improve the Na content. Li-B doped Na0.8Ni0.3Mn0.6Li0.05B0.05O2 delivers a capacity of 85 mAh/g and excellent capacity retention (88 % after 500 cycles). The effects of Li-B doping in P2-type Na0.67Ni0.33Mn0.67O2 are systematically investigated.

引用

页数：4

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