High-Lithiophilicity Host with Micro/Nanostructured Active Sites based on Wenzel Wetting Model for Dendrite-Free Lithium Metal Anodes

Mei Yang; Zhou Jiahui; Hao YutongHu XinLin JiaoHuang YongxinLi LiFeng ChanggenWu FengChen Renjie

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High-Lithiophilicity Host with Micro/Nanostructured Active Sites based on Wenzel Wetting Model for Dendrite-Free Lithium Metal Anodes

机译：High-Lithiophilicity Host with Micro/Nanostructured Active Sites based on Wenzel Wetting Model for Dendrite-Free Lithium Metal Anodes

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Superior lithophilicity for the 3D host is essential to enable both uniform molten lithium (Li) infusion during synthesis and a low Li nucleation barrier during cycling. The wetting behavior between the host surface and molten Li can be reasonably predicted by the typical Wenzel model. Herein, inspired by the model, a lotus-leaf-like carbon nanotube (CNT)/NiO spheres hybrid structure is employed to improve the wettability and regulate Li plating/stripping. First, the CNTs interweave to form a highly conductive and robust sponge with accelerated Li+ transport and reinforced stability. Second, the embedded NiO microspheres possess the Li-active nature. More importantly, the surface roughness caused by nano-sized protuberances over its surface further stronger the lithiophilicity. By the in situ optical microscope and calculations, this multistage structure is proven to homogenize the Li deposition and inhibit dendrite growth. As a result, the composite anode enables excellent cycling performance at both symmetric and full cells. This design of micro/nanostructured host provides a new perspective on the development of an excellent wettable host for Li-metal anode.

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来源
《Advanced functional materials》 |2021年第50期|2106676.1-2106676.9|共9页
作者
Mei Yang; Zhou Jiahui; Hao YutongHu XinLin JiaoHuang YongxinLi LiFeng ChanggenWu FengChen Renjie;
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Beijing Inst Technol, Beijing Key Lab Environm Sci & Engn, Sch Mat Sci & Engn, Beijing 100081, Peoples R China;

Beijing Inst Technol, Beijing Key Lab Environm Sci & Engn, Sch Mat Sci & Engn, Beijing 100081, Peoples R China|Beijing Inst Technol, Adv Technol Res Inst Jinan, Jinan 250300, Peoples R China;

Beijing Inst Technol, Beijing Key Lab Environm Sci & Engn, Sch Mat Sci & Engn, Beijing 100081, Peoples R China|Beijing Inst Technol, Adv Technol Res Inst Jinan, Jinan 250300, Peoples R China|Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing 100081, PBeijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China;

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lithiophilicity; long cycling; metallic lithium anodes; micro; nanostructures; Wenzel model;

High-Lithiophilicity Host with Micro/Nanostructured Active Sites based on Wenzel Wetting Model for Dendrite-Free Lithium Metal Anodes

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