Ionic conductive polymers as artificial solid electrolyte interphase films in Li metal batteries - A review

MATERIALS TODAY

卷:40

Review

Gao, Shilun¹  Sun, Feiyuan¹  Liu, Nian²  Yang, Huabin^1,3  Cao, Peng-Fei⁴ 

[1] Nankai Univ, Inst New Energy Mat Chem, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China

[2] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA

[3] Nankai Univ, Tianjin Key Lab Met & Mol Based Mat Chem, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China

[4] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37830 USA

关键词: Artificial solid electrolyte interphase;    Polymer materials;    Ionic conducting;    Li metal batteries;   

DOI  :  10.1016/j.mattod.2020.06.011

来源: Elsevier

【 摘 要 】

Lithium (Li) metal has been considered as the ultimate anode material for next-generation rechargeable batteries due to its ultra-high theoretical specific capacity (3860 mAh g(-1)) and the lowest reduction voltage (-3.04 V vs the standard hydrogen electrode). However, the dendritic Li formation, uncontrolled interfacial reactions, and huge volume variations lead to unstable solid electrolyte interphase (SEI) layer, low Coulombic efficiency and hence short cycling lifetime. Designing artificial solid electrolyte interphase (artificial SEI) films on the Li metal electrode exhibits great potential to solve the aforementioned problems and enable Li-metal batteries with prolonged lifetime. Polymer materials with good ionic conductivity, superior processability and high flexibility are considered as ideal artificial SEI film materials. In this review, according to the ionic conductive groups, recent advances in polymeric artificial SEI films are summarized to afford a deep understanding of Li ion plating/stripping behavior and present design principles of high-performance artificial SEI films in achieving stable Li metal electrodes. Perspectives regarding to the future research directions of polymeric artificial SEI films for Li-metal electrode are also discussed. The insights and design principles of polymeric artificial SEI films gained in the current review will be definitely useful in achieving the Li-metal batteries with improved energy density, high safety and long cycling lifetime toward next-generation energy storage devices.

【 授权许可】

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