商用碳酸盐电解质中无阳极锂金属电池用连续释放添加剂制备的富N, s - SEI

IF 13 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Small Pub Date : 2024-12-20 DOI:10.1002/smll.202410486
Ruining Jiang, Zhenglu Zhu, Xiaoqun Qi, Fengyi Yang, Haoran Du, Jie Ji, Renyuan Zhang, Zhikang Liu, Long Qie
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引用次数: 0

摘要

无阳极锂金属电池(afb)具有尽可能高的能量密度,但仍然受到容量快速衰减的挑战,特别是对于在商业碳酸盐岩电解质中运行的电池,这可以归因于阳极侧形成的固体电解质界面(SEI)稳定性差和不断破裂/形成。本文提出了在碳酸盐电解质中溶解度低且可以连续释放的牺牲添加剂。牺牲和持续释放的特性使添加剂能够在长期循环过程中形成和修复SEI,从而最大限度地减少活性锂的损失,并使具有高负载LiNi0.8Co0.1Mn0.1O2 (21.7 mg cm−2)阴极的aflmb在商业碳酸盐电解质中循环50次后具有68.9%的高容量保持率,而对照电池在30次循环后失效。这项工作为aflmb的实际应用提供了一个简单而潜在的策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

N, S-Rich SEI Derived From Continuously-Releasing Additive for Anode-Free Lithium-Metal Batteries in Commercial Carbonate Electrolyte

N, S-Rich SEI Derived From Continuously-Releasing Additive for Anode-Free Lithium-Metal Batteries in Commercial Carbonate Electrolyte

Featured with the highest possible energy density, anode-free lithium-metal batteries (AFBs) are still challenged by the fast capacity decay, especially for the ones operated in commercial carbonate electrolytes, which can be ascribed to the poor stability and continual broken/formation of the solid-electrolyte interface (SEI) formed on the anode side. Here, sacrificial additives, which have low solubility in carbonate electrolytes and can be continuously released, are proposed for AFBs. The sacrificial and continuously-releasing feature gifts the additives the capability to form and heal the SEI during the long-term cycling process, thus minimizing the loss of active Li and enabling the AFLMBs with high loading LiNi0.8Co0.1Mn0.1O2 (21.7 mg cm−2) cathode a high capacity-retention of 68.9% after 50 cycles in commercial carbonate electrolyte, in contrast to the control cell failed after 30 cycles. This work presents a simple and potential strategy for the practical applications of AFLMBs.

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来源期刊
Small
Small 工程技术-材料科学:综合
CiteScore
17.70
自引率
3.80%
发文量
1830
审稿时长
2.1 months
期刊介绍: Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.
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