Inorganic-Rich and Flexible Solid-Electrolyte Interphase Formed Over Dipole-Dipole Interaction for Highly Stable Lithium-Metal Anodes

Jinqi Zhu; Zhe Cui; Shu-Ang HeHao WangMengluan GaoWenqing WangJianmao YangXintong XuJunqing HuAijiang LuRujia Zou

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Inorganic-Rich and Flexible Solid-Electrolyte Interphase Formed Over Dipole-Dipole Interaction for Highly Stable Lithium-Metal Anodes

机译：Inorganic-Rich and Flexible Solid-Electrolyte Interphase Formed Over Dipole-Dipole Interaction for Highly Stable Lithium-Metal Anodes

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The uncontrollable lithium (Li) dendrite growth and unstable solid electrolyte interfaces (SEI) hinder the practical application of Li metal batteries (LMBs). Herein, a PAN/CNTs-based SiO_2-modified vertical-cavity film (PCS-VCF) with a network structure is prepared by a simple spin-coating process to address these challenges. This new current collector with a polar lithiophilic network stabilizes the Li metal anodes by regulating the chemical environment in carbonate electrolytes. The dipole interaction between the C≡N groups and the C=O groups reduces the high reactivity of the carbonates in the electrolyte, forming an SEI layer with higher inorganic components and enhancing the stability of the electrode/electrolyte interface. The special vertical-cavity network structure inside the current collector can decrease local current density and suppress the huge volume expansion of Li metal during the cycling process. Consequently, a high-performance Li metal anode with dendrite-free morphology is achieved (over 1500 cycles with low overpotential at 20 mA cm~(?2) in symmetric cells). Furthermore, full cell with the LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2 cathode delivers a stable capacity of 164.5 mA h g~(?1) for 500 cycles at 5 C, with a capacity decay rate of 0.077% per cycle.

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来源
《Advanced functional materials》 |2022年第44期|2205304.1-2205304.11|共11页
作者
Jinqi Zhu; Zhe Cui; Shu-Ang HeHao WangMengluan GaoWenqing WangJianmao YangXintong XuJunqing HuAijiang LuRujia Zou;
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作者单位

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620, P. R. China;

State Key Lab Modificat Chem Fibers & Polymer Mat, Res Ctr Anal & Measurement Donghua University Shanghai 201620, P. R. China;

College of Integrated Circuits and Optoelectronic Chips Shenzhen Technology University Shenzhen 518118, P. R. ChinaDepartment of Physics Donghua University Shanghai 201620, P. R. China;

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dipole-dipole interaction; lithium dendrites; lithium metal batteries; solid electrolyte interfaces;

Inorganic-Rich and Flexible Solid-Electrolyte Interphase Formed Over Dipole-Dipole Interaction for Highly Stable Lithium-Metal Anodes

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