Multi-element coupling driven high performance sodium-ion phosphate cathode

IF 18.9 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Energy Storage Materials Pub Date : 2025-02-23 DOI:10.1016/j.ensm.2025.104141

Zechen Li, Chen Sun, Xiaoyang Wang, Yang Li, Xuanyi Yuan, Haibo Jin, Yongjie Zhao

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引用次数: 0

Abstract

Balancing energy density and lifespan is an essential issue for NASICON-type cathodes. Fully integrating electrochemical properties of vanadium, manganese and iron elements, regulating voltage plateaus and introducing entropy effects rationally, this work proposes a novel Na_11/3(V,Mn,Fe)_2/3(PO₄)₃ (ME-NVMFP) cathode with a capacity of 111.9 mAh g⁻¹ and high energy density of 339.0 Wh kg⁻¹. Ascribed to reasonable components design, ME-NVMFP achieves an ultra-long cycling lifespan (a capacity retention over 70% after 4000 cycles at 5 C) and potential application in fast charging realm (a capacity retention of 87.6% after 1300 cycles at 20 C). Notably, ME-NVMFP exhibits admirable low temperature adaptability under 0°C (91.6% at 10 C over 1800 cycles) and can still operate well even under -20°C (92.3% at 5 C over 1000 cycles). DRT analysis was conducted to explore sodium-ion storage mechanism, verifying highly reversible evolution of CEI on cathode surface. Ex-situ XRD analysis were performed, revealing an inspiring volume variation ratio of 2.4% and probing the structural evolution of ME-NVMFP. What's more, ME-NVMFP||Hard Carbon cell delivers a high energy density of 330.9 Wh kg⁻¹ at 0.2 C. This article provides a promising strategy of multi-element coupling design to optimize the overall performance of polyanion sodium ion cathodes.

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来源期刊

Energy Storage Materials Materials Science-General Materials Science

CiteScore

33.00

自引率

5.90%

发文量

652

审稿时长

27 days

期刊介绍： Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field. Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy. Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.