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首页> 外文期刊>Advanced Functional Materials >Stable Na Metal Anode Enabled by a Reinforced Multistructural SEI Layer
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Stable Na Metal Anode Enabled by a Reinforced Multistructural SEI Layer

机译：增强的多结构SEI层可实现稳定的Na金属阳极

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摘要

Metallic sodium (Na) is one of the most promising anode candidates for next-generation secondary batteries. The development of Na metal batteries with a high energy density and low cost is desirable to meet the requirements of both portable and stationary electrical energy storage. Unfortunately, several problems caused by the unstable Na metal anode severely hinder the practical applications of these batteries. Here reported is a facile but effective methodology to form a multistructural interphase layer containing a sodium fluoride-rich solid electrolyte interphase (SEI) and crisscrossed Na3Sb bars on the Na electrode surface. The reinforced Na-alloy network and chemically/electrochemically complementary SEI formation greatly improve the interphase strength and Na+ conductivity. The well-protected Na metal electrode in symmetric Na|Na cells is stable and dendrite-free in the plating and stripping cycling processes with a negligible voltage divergence, even at a large current density of 5 mA cm(-2) or with a high deposition capacity of 10 mAh cm(-2). Moreover, this anode is especially compatible with different cathodes and demonstrates outstanding cycle performance in the full cells. It is believed that this approach provides a practical solution toward stable Na metal anodes and related battery systems.
机译：金属钠（Na）是下一代二次电池最有希望的负极材料之一。为了满足便携式和固定电能存储的需求，期望开发具有高能量密度和低成本的Na金属电池。不幸的是，由不稳定的Na金属阳极引起的几个问题严重阻碍了这些电池的实际应用。这里报道了一种简便而有效的方法，以形成包含富氟化钠固体电解质中间相（SEI）和Na电极表面上纵横交错的Na3Sb棒的多结构中间层。增强的钠合金网络和化学/电化学互补的SEI形成极大地提高了相间强度和Na +电导率。即使在5 mA cm（-2）的大电流密度下或在高电流密度下，对称Na | Na电池中受良好保护的Na金属电极在镀覆和剥离循环过程中也稳定且无枝晶，电压发散可忽略不计沉积容量为10 mAh cm（-2）。此外，该阳极与不同的阴极特别兼容，并在全电池中表现出出色的循环性能。相信该方法为稳定的Na金属阳极和相关的电池系统提供了实用的解决方案。

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  • 来源
    《Advanced Functional Materials》 |2019年第27期|1901924.1-1901924.10|共10页
  • 作者

    Xu Zhixin; Yang Jun; Zhang Tao; Sun Limin; Nuli Yanna; Wang Jiulin; Hirano Shin-ichi;

  • 作者单位

    Shanghai Jiao Tong Univ, Shanghai Electrochem Energy Devices Res Ctr, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Shanghai Electrochem Energy Devices Res Ctr, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Shanghai Electrochem Energy Devices Res Ctr, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Instrumental Anal Ctr, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Shanghai Electrochem Energy Devices Res Ctr, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Shanghai Electrochem Energy Devices Res Ctr, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Hirano Inst Mat Innovat, Shanghai 200240, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    batteries; dendrite prevention; Na metal anodes; Na3Sb alloy; NaF;

    机译：电池;防枝晶;钠金属阳极;Na3Sb合金;NaF;

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