Design of high-entropy P2/O3 hybrid layered oxide cathode material for high-capacity and high-rate sodium-ion batteries

Hao，Dingbang1; Zhang，Gaoyuan1; Ning，De2; Zhou，Dong3; Chai，Yan1; Xu，Jin3; Yin，Xingxing4; Du，Ruijie1; Schuck，Götz5; Wang，Jun6; Li，Yongli1

2024-06-15

10.1016/j.nanoen.2024.109562

Nano Energy   影响因子和分区

2211-2855

High-entropy layered cathode materials have garnered significant attention due to their exceptional structural stability and capacity retention. However, the complex composition of these materials has posed challenges for performance optimization. Herein, an innovative high-entropy P2/O3 hybrid layered oxide cathode material with impressive reversible capacity and high-rate capabilities is designed according to the configurational entropy adjustment strategy. Specifically, the unique structure of NaLiNiFeMnTiO (LNFMT) exhibits not only enhanced anionic activity but also mitigated migration of transition metals at high voltage. The high-entropy effect facilitates the migration of Li to Na layer, forming a pseudo-tetrahedral structure that hinders the movement of Fe. Additionally, the robust Ti-O bond ensures the internal cohesion of transition metal layers, enhancing the structural stability during de-/intercalation processes. As a result, the undesirable P2-O2 phase transformation is effectively suppressed in 1.5–4.5 V, leading to a remarkable capacity retention of over 70% after 100 cycles at 0.2 C. Moreover, LNFMT shows a high discharge capacity of 116 mAh/g at 10 C with excellent capacity retention of 94.23% after 150 cycles in 2.0–4.2 V, demonstrating its superior rate capability. This research showcases the significant impact of the high-entropy effect and provides a novel perspective for the design of sodium-ion cathode materials.

High entropy Hybrid phase Layered oxide cathode materials Sodium-ion batteries Structural evolution

SCI ; EI

英语

其他

2-s2.0-85189499743

Scopus

1.Institute for Clean Energy Technology,North China Electric Power University,Beijing,102206,China
2.Centre for Photonics Information and Energy Materials,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen,518055,China
3.Institute of Advanced Science Facilities,Shenzhen,518107,China
4.School of Materials,Sun Yat-Sen University,Shenzhen,518107,China
5.Helmholtz-Zentrum Berlin für Materialen und Energie,Berlin,12489,Germany
6.School of Innovation and Entrepreneurship,Southern University of Science and Technology,Shenzhen,518055,China

Hao，Dingbang,Zhang，Gaoyuan,Ning，De,et al. Design of high-entropy P2/O3 hybrid layered oxide cathode material for high-capacity and high-rate sodium-ion batteries[J]. Nano Energy,2024,125.

Hao，Dingbang.,Zhang，Gaoyuan.,Ning，De.,Zhou，Dong.,Chai，Yan.,...&Li，Yongli.(2024).Design of high-entropy P2/O3 hybrid layered oxide cathode material for high-capacity and high-rate sodium-ion batteries.Nano Energy,125.

Hao，Dingbang,et al."Design of high-entropy P2/O3 hybrid layered oxide cathode material for high-capacity and high-rate sodium-ion batteries".Nano Energy 125(2024).