李S - 用于全固态锂金属电池的基于聚环氧乙烷的复合聚合物电解质
Li S -Integrated PEO-Based Polymer Electrolytes for All-Solid-State Lithium-Metal Batteries.
作者信息
Fang Ruyi, Xu Biyi, Grundish Nicholas S, Xia Yang, Li Yutao, Lu Chengwei, Liu Yijie, Wu Nan, Goodenough John B
机构信息
Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA.
College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
出版信息
Angew Chem Int Ed Engl. 2021 Aug 2;60(32):17701-17706. doi: 10.1002/anie.202106039. Epub 2021 Jun 30.
The integration of Li S within a poly(ethylene oxide) (PEO)-based polymer electrolyte is demonstrated to improve the polymer electrolyte's ionic conductivity because the strong interplay between O and Li from Li S reduces the crystalline volume within the PEO. The Li/electrolyte interface is stabilized by the in situ formation of an ultra-thin Li S/Li S layer via the reaction between Li S and lithium metal, which increases the ionic transport at the interface and suppresses lithium dendrite growth. A symmetric Li/Li cell with the Li S -integrated composite electrolyte has excellent cyclability and a high critical current density of 0.9 mA cm at 40 °C. Impressive electrochemical performance is demonstrated with all-solid-state Li/LiFePO and high-voltage Li/LiNi Mn Co O cells at 40 °C.
将Li₂S整合到基于聚环氧乙烷（PEO）的聚合物电解质中，被证明可以提高聚合物电解质的离子电导率，因为Li₂S中O和Li之间的强烈相互作用减少了PEO中的结晶体积。通过Li₂S与锂金属之间的反应原位形成超薄的Li₂S/Li₂S层，稳定了Li/电解质界面，这增加了界面处的离子传输并抑制了锂枝晶的生长。具有Li₂S整合复合电解质的对称Li/Li电池具有出色的循环性能，在40°C时临界电流密度高达0.9 mA cm⁻²。在40°C下，全固态Li/LiFePO₄和高压Li/LiNi₀.₅Mn₀.₃Co₀.₂O₂电池展示出令人印象深刻的电化学性能。
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