Electronegative Nanochannels Accelerating Lithium-Ion Transport for Enabling Highly Stable and High-Rate Lithium Metal Anodes

Zhendong Hao; Chengjie Wang; Yue WuQianqian ZhangHong XuYuhong JinJingbing LiuHao WangXiangming He

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Electronegative Nanochannels Accelerating Lithium-Ion Transport for Enabling Highly Stable and High-Rate Lithium Metal Anodes

机译：Electronegative Nanochannels Accelerating Lithium-Ion Transport for Enabling Highly Stable and High-Rate Lithium Metal Anodes

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Achieving a high Li~+ transference number is an effective strategy to inhibit thenucleation of lithium dendrites on the metal anode according to classicalSand’s time principle. However, improving the Li~+ transference numberusually causes aloss of ionic conductivity of lithium metal batteries. Here,inspired by biological ion channels tuning ion transport, an electronegativenanochannels separator is developed to accelerate Li+ transport for enablingdendrite-free and high-rate lithium metal anodes. Benefiting from selectiveand fast Li~+ transport, the electronegative nanochannels separator cansimultaneously achieve high Li~+ transference number (0.77) and high Li~+conductivity (1.36 mS cm~（?2）) within a liquid lithium metal battery. Such anoptimization of Li+ transport dynamics can significantly prolong thenucleation time of lithium dendrite and thus effectively suppress dendriticgrowth, which contributes to an extremely stable Li plating/stripping cyclingfor over 2000 h at a high current density of 5 mA cm~（?2）. When assembled intolithium metal batteries, the electronegative nanochannels separator enablessuperior comprehensive electrochemical performance compared with thecommercial polyolefin one. This work provides new insights into the design offunctional separators toward dendrite-free and high-rate liquid lithium metalbatteries.

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来源
《Advanced energy materials》 |2023年第28期|2204007.1-2204007.10|共10页
作者
Zhendong Hao; Chengjie Wang; Yue WuQianqian ZhangHong XuYuhong JinJingbing LiuHao WangXiangming He;
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作者单位

Key Laboratory for New Functional Materials of Ministry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124, China;

Institute of Nuclear andNewEnergy TechnologyTsinghua UniversityBeijing 100084, China;

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正文语种英语
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electronegative nanochannels; functional separators; lithium dendrites; Li~+ transference number; ion conductivity;

Electronegative Nanochannels Accelerating Lithium-Ion Transport for Enabling Highly Stable and High-Rate Lithium Metal Anodes

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