非晶氧化铝涂层NaFe0.33Ni0.33Mn0.33O2正极材料：增强高性能钠离子电池的界面电荷转移,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

非晶氧化铝涂层NaFe0.33Ni0.33Mn0.33O2正极材料：增强高性能钠离子电池的界面电荷转移
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-10-24 , DOI: 10.1021/acsami.3c09242
Bao Zhang ₁ , Yi Zhao ₁ , Minghuang Li ₁ , Qi Wang ₁ , Xingyuan Wang ₁ , Lei Cheng ₂ , Lei Ming ₁ , Xing Ou ₁ , Xiaowei Wang ₁

Affiliation

钠离子电池（SIB）的层状正极材料由于其高容量和工业可扩展性的潜力而作为有前途的候选材料而受到广泛关注。尽管如此，较大离子半径物质的沉积导致的应力和结构退化带来了挑战，导致循环稳定性和倍率性能下降。在这项研究中，我们提出了一种新颖而简单的策略，结合了非晶氧化铝涂层和铝离子掺杂的协同效应。该方法有效解决了SIB材料中晶粒开裂的问题，并扩大了碱金属离子的层间距，从而提高了其整体性能。因此，它优化了载流子的扩散并促进界面电荷转移，从而显着提高了具有 0.4 wt% 非晶氧化铝涂层的NaNi 0.33 _Mn 0.33 _Fe 0.33 _O 2_材料（NNMF-0.4A）的性能，其表现出在0.1、0.5、1、2、5和10 C下的可逆容量分别为135.7、114.3、106.8、99.9、89.5和77.1 mAh g ^–1。^{此外，NNMF-0.4A材料在800 mA g –1} (10 C )电流密度下循环500次后容量仍保持在76.7 mA g ^–1，容量保持率为98.2%。我们的研究结果为改性高功率钠离子电池正极材料提供了一条突破性的途径，有助于可持续能源存储技术的进步。

"点击查看英文标题和摘要"

Amorphous Aluminum Oxide-Coated NaFe0.33Ni0.33Mn0.33O2 Cathode Materials: Enhancing Interface Charge Transfer for High-Performance Sodium-Ion Batteries

Layered cathode materials for sodium-ion batteries (SIBs) have gained considerable attention as promising candidates owing to their high capacity and potential for industrial scalability. Nonetheless, challenges arise from stress and structural degradation resulting from the deposition of larger ion radius species, leading to diminished cyclic stability and rate performance. In this study, we present a novel and straightforward strategy that combines the synergistic effects of an amorphous aluminum oxide coating and aluminum ion doping. This approach effectively addresses the issues of grain cracking and expands the interlayer spacing of alkali metal ions in SIB materials, thereby enhancing their overall performance. Consequently, it optimizes the diffusion of charge carriers and facilitates interfacial charge transfer, leading to remarkable improvements in the performance of the NaNi_0.33Mn_0.33Fe_0.33O₂ material with 0.4 wt % amorphous aluminum oxide coating (NNMF-0.4A), which exhibits reversible capacities of 135.7, 114.3, 106.8, 99.9, 89.5, and 77.1 mAh g^–1 at 0.1, 0.5, 1, 2, 5, and 10 C, respectively. Furthermore, the NNMF-0.4A material maintains a capacity of 76.7 mA g^–1 after 500 cycles at a current density of 800 mA g^–1 (10 C), with a capacity retention rate of 98.2%. Our findings present a groundbreaking pathway for modifying high-power sodium-ion battery cathode materials, contributing to the advancement of sustainable energy storage technologies.

更新日期：2023-10-24

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南