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Investigation of polysulfone film on high-performance anode with stabilized electrolyte/electrode interface for lithium batteries

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Journal of Energy Chemistry 2020年第3期29卷 49-55页

作者： Yuyan Ma Chen Dong Qiuli Yang Yuxin Yin Xiaoping Bai Shuying Zhen Cheng Fan Kening Sun Beijing Key Laboratory for Chemical Power Source and Green Catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Yinlong Energy Co. Ltd.Zhuhai 519040GuangdongChina Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

Lithium metal has been considered to be the most promising anode material for the new generation of energy-storage system.However,challenges still stand in protecting lithium metal from spontaneous reactions with electrolytes and preventing the dendritic propagation,both of which would lead to undesirable decrease in Coulombic efficiency.Polysulfone(PSf)membrane with high rigidity and free-volume cavities of approximately 0.3 nm was employed to provide a stable interface on the surface of anodic electrode.The isotropic channels were constructed by the interconnected and uniformly distributed free volumes in the polymer matrix,and were expected to be swelled by solvent molecules and anions of lithium salt and to allow Li+ions to pass through onto the electrode surface.As a result,dendrite-free morphology of deposited lithium was observed.The stabilized interface arose from the PSf film was verified by the promoted performances of Cu|Li cells and steady voltage polarization of Li|Li cells.The full cell with PSf coated anode exhibited excellent cyclability(85%capacity retention rate over 400 cycles at 1C)and an outstanding rate capability(117 m Ah g-1 at 5C).The beneficial performances were further verified by the EIS results.This work provides a new strategic idea to settle the dendritic problems of Li metal anodes.

关键词： Lithium metal electrolyte/electrode interface Dendrite-free Polysulfone Free volume

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Interface science in polymer-based composite solid electrolytes in lithium metal batteries

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SusMat 2022年第3期2卷 264-292页

作者： Lingqiao Wu Yongtao Wang Xianwei Guo Peipei Ding Zhiyuan Lin Haijun Yu Faculty of Materials and Manufacturing Institute of Advanced Battery Materials and DevicesBeijing University of TechnologyBeijingChina Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijingChina

Solid-state lithium metal batteries(SSLMBs)have attracted considerable attention as one of the most promising energy storage systems owing to their high safety and energy density.Solid electrolytes,particularly polymer-based composite solid electrolytes(CSEs),are considered promising electrolyte candidates for SSLMBs.However,theirwide application is inhibited by various electrochemical issues,such as low ionic conductivity,the growth of lithium dendrites,and poor cycling stability,which are related to interface issues within SSLMBs.In this review,the parameters related to various interfaces in the CSE of SSLMBs,including the interfaces between the polymer matrix and inorganic fillers,between the CSEs and the cathode,and between the CSEs and the lithium metal anode,are examined.Relevant issues and corresponding remediation strategies are proposed.Finally,future perspectives based on interfacial engineering and the characterization of polymer/inorganic filler interactions are proposed for building high-performance CSEs for use in SSLMBs.

关键词： composite solid electrolyte interface electrolyte/electrode organic-inorganic composite solid electrolyte solid-state lithium metal battery

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Designing solid-state interfaces on lithium-metal anodes: a review

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Science China Chemistry 2019年第10期62卷 1286-1299页

作者： Chen-Zi Zhao Hui Duan Jia-Qi Huang Juan Zhang Qiang Zhang Yu-Guo Guo Li-Jun Wan Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China University of Chinese Academy of Sciences Beijing 100049China

Li-metal anodes are one of the most promising energy storage systems that can considerably exceed the current technology to meet the ever-increasing demand of power applications. The apparent cycling performances and dendrite challenges of Li-metal anodes are highly influenced by the interface layer on the Li-metal anode because the intrinsic high reactivity of metallic Li results in an inevitable solid-state interface layer between the Li-metal and electrolytes. In this review, we summarize the recent progress on the interfacial chemistry regarding the interactions between electrolytes and ion migration through dynamic interfaces. The critical factors that affect the interface formation for constructing a stable interface with a low resistance are reviewed. Moreover, we review emerging strategies for rationally designing multiple-structured solid-state electrolytes and their interfaces, including the interfacial properties within hybrid electrolytes and the solid electrolyte/electrode interface. Finally, we present scientific issues and perspectives associated with Li-metal anode interfaces toward a practical Li-metal battery.

关键词： lithium-metal anode solid-state electrolyte energy chemistry rechargeable lithium-metal batteries solid electrolyte/electrode interface

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