Xiangnan Li, Xinyu Tang, Mengdan Zhang, Ming Ge, Xiaojian Liu, Yuantao Cui, Yiwei Xu, Huishuang Zhang, Yanhong Yin, Shu-Ting Yang
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引用次数: 0
摘要
层状过渡金属氧化物在钠离子电池中的发展前景非常好，但也存在一些问题，如循环稳定性差、相变复杂等。针对钠离子电池中 O3 型层状氧化物所面临的挑战，我们开发了球形 NaNi0.25Fe0.15Mn0.3Ti0.1Sn0.05Co0.05Li0.1O2 （SP-HEO）。SP-HEO 材料是通过堆积和高熵合成的。多种策略相结合，提高了电化学性能和空气稳定性。SP-HEO 在 0.1 C 时的比放电容量为 150.1 mA h g-1，在 7 C 时的比放电容量为 100.4 mA h g-1。这项研究不仅介绍了一种高熵设计的高分带密度球形存储材料，还消除了业界对钠离子层状氧化物阴极材料性能的担忧。
Multiple Strategies to Build High-Performance Spherical Na-Ion Layered Oxide Cathodes
The development prospect of layered transition metal oxides in sodium-ion batteries is excellent, but there are some problems, such as poor cycle stability and a complex phase transition. The spherical NaNi0.25Fe0.15Mn0.3Ti0.1Sn0.05Co0.05Li0.1O2 (SP-HEO) has been developed to address the challenges faced by O3-type layered oxide in sodium-ion batteries. The SP-HEO material is synthesized by piling and high entropy. The multiple strategies combine to enhance the electrochemical performance and air stability. The SP-HEO demonstrated a specific discharge capacity of 150.1 mA h g–1 at 0.1 C and 100.4 mA h g–1 at 7 C. Ex situ XRD analysis confirmed that the SP-HEO effectively retards complex phase transitions. This study not only introduces a high-entropy design for high tap density spherical storage materials but also dispels industry concerns regarding the performance of sodium ion layered oxide cathode materials.
期刊介绍：
ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels.
The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.
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