Optimizing Interface Chemistry with Novel Covalent Molecule for Highly Sustainable and Kinetics-Enhanced Sodium Metal Batteries

IF 18.9 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Energy Storage Materials Pub Date : 2024-11-07 DOI:10.1016/j.ensm.2024.103898
Xiaolong Cheng, Dongjun Li, Yu Yao, Fanfan Liu, Biao Ma, Pengcheng Shi, Yu Shao, Fangzhi Huang, Yingjie Sun, Yu Jiang, Shikuo Li
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Abstract

Metallic sodium has attracted increasing attention as an ideal anode material for next-generation high energy density and low-cost secondary batteries. However, it is highly desired yet remains challenging to improve their cycling stability and safety due to unstable solid electrolyte interphase and dendrite growth. Herein, a hybrid interface layer composed of Na2Se and Na3P is constructed on the surface of Na (Na@NPS) via in situ spontaneous reaction. The hybrid interface layer with merits of high sodiophilicity and high Na-ion conductivity can effectively induce homogeneous Na-ion flux distribution, accelerate the reaction kinetics and suppress decomposition of electrolyte components. Benefitting from the above advantages, the Na@NPS symmetric cell delivers a long cycle life (1000 h at 1 mA cm–2 and 1 mAh cm–2). Furthermore, the full cell coupling with Na3V2(PO4)3-based cathode provides an exceptionally long lifespan (1500 cycles) at 20 C with a capacity retention of 98.2% and high energy density (226 Wh kg–1). Therefore, the enhanced electrochemical performance illustrates the feasibility of the covalent molecule derived hybrid multifunctional interfaces in solving the irregular deposition of Na-ion and expediting reaction kinetics in Na metal batteries.
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利用新型共价分子优化界面化学,实现高度可持续和动力学增强型金属钠电池
金属钠作为下一代高能量密度和低成本二次电池的理想阳极材料,已引起越来越多的关注。然而,由于不稳定的固体电解质相间和树枝状晶生长,提高其循环稳定性和安全性仍是一项挑战。本文通过原位自发反应,在 Na(Na@NPS)表面构建了由 Na2Se 和 Na3P 组成的混合界面层。该混合界面层具有高亲钠性和高Na离子传导性的优点,能有效诱导均匀的Na离子通量分布,加速反应动力学,抑制电解质成分的分解。得益于上述优势,Na@NPS 对称电池具有较长的循环寿命(在 1 mA cm-2 和 1 mAh cm-2 条件下分别为 1000 h)。此外,与基于 Na3V2(PO4)3 的阴极耦合的全电池在 20 C 温度下具有超长的使用寿命(1500 次循环),容量保持率高达 98.2%,能量密度高(226 Wh kg-1)。因此,电化学性能的提高说明了共价分子衍生混合多功能界面在解决 Na 离子不规则沉积和加快 Na 金属电池反应动力学方面的可行性。
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来源期刊
Energy Storage Materials
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.
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