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首页> 外文期刊>Advanced Functional Materials >Effective Polysulfide Rejection by Dipole-Aligned BaTiO3 Coated Separator in Lithium-Sulfur Batteries
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Effective Polysulfide Rejection by Dipole-Aligned BaTiO3 Coated Separator in Lithium-Sulfur Batteries

机译：锂硫电池中偶极取向的BaTiO3涂层隔离膜有效地抑制多硫化物

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摘要

Although the exceptional theoretical specific capacity (1672 mAh g(-1)) of elemental sulfur makes lithium-sulfur (Li-S) batteries attractive for upcoming rechargeable battery applications (e.g., electrical vehicles, drones, unmanned aerial vehicles, etc.), insufficient cycle lives of Li-S cells leave a substantial gap before their wide penetration into commercial markets. Among the key features that affect the cyclability, the shuttling process involving polysulfides (PS) dissolution is most fatal. In an effort to suppress this chronic PS shuttling, herein, a separator coated with poled BaTiO3 or BTO particles is introduced. Permanent dipoles that are formed in the BTO particles upon the application of an electric field can effectively reject PS from passing through the separator via electrostatic repulsion, resulting in significantly improved cyclability, even when a simple mixture of elemental sulfur and conductive carbon is used as a sulfur cathode. The coating of BTO particles also considerably suppresses thermal shrinkage of the poly(ethylene) separator at high temperatures and thus enhances the safety of the cell adopting the given separator. The incorporation of poled particles can be universally applied to a wide range of rechargeable batteries (i.e., metal-air batteries) that suffer from cross-contamination of charged species between both electrodes.
机译：尽管元素硫的出色理论比容量（1672 mAh g（-1））使锂硫（Li-S）电池对于即将到来的可充电电池应用（例如，电动汽车，无人机，无人驾驶飞机等）具有吸引力， Li-S电池的不足的循环寿命在其广泛进入商业市场之前留下了巨大的空白。在影响可循环性的关键特征中，涉及多硫化物（PS）溶解的穿梭过程最为致命。为了抑制这种长期的PS穿梭，本文引入了涂覆有极化BaTiO3或BTO颗粒的隔板。施加电场后，BTO颗粒中形成的永久偶极子可有效阻止PS经由静电排斥而通过隔板，从而即使使用简单的元素硫和导电碳的混合物作为碳，也能显着提高循环性。硫阴极。 BTO颗粒的涂层还显着抑制了高温下聚乙烯隔板的热收缩，因此提高了采用给定隔板的电池的安全性。极性粒子的掺入可普遍应用于遭受两个电极之间的带电物质的交叉污染的各种可再充电电池（即，金属-空气电池）。

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  • 来源
    《Advanced Functional Materials》 |2016年第43期|7817-7823|共7页
  • 作者

    Yim Taeeun; Han Seung Ho; Park Nam Hwan; Park Min-Sik; Lee Ji Hoon; Shin Jaeho; Choi Jang Wook; Jung Yongju; Jo Yong Nam; Yu Ji-Sang; Kim Ki Jae;

  • 作者单位

    Incheon Natl Univ, Dept Chem, Acad Ro 119, Inchon 22012, South Korea;

    Korea Elect Technol Inst, Adv Batteries Res Ctr, 68 Yatap Dong, Seongnam 463816, Gyeonggi Do, South Korea;

    Korea Elect Technol Inst, Adv Batteries Res Ctr, 68 Yatap Dong, Seongnam 463816, Gyeonggi Do, South Korea;

    Kyung Hee Univ, Dept Adv Mat Engn Informat & Elect, Deokyoung Daero 1732, Yongin 17104, Gyeonggi Do, South Korea;

    Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil EEWS, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, Inst NanoCentury, 291 Daehak Ro, Daejeon 305701, South Korea;

    Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil EEWS, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, Inst NanoCentury, 291 Daehak Ro, Daejeon 305701, South Korea;

    Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil EEWS, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, Inst NanoCentury, 291 Daehak Ro, Daejeon 305701, South Korea;

    Korea Univ Technol & Educ KOREATECH, Dept Chem Engn, Cheonan 330780, South Korea;

    Korea Elect Technol Inst, Adv Batteries Res Ctr, 68 Yatap Dong, Seongnam 463816, Gyeonggi Do, South Korea;

    Korea Elect Technol Inst, Adv Batteries Res Ctr, 68 Yatap Dong, Seongnam 463816, Gyeonggi Do, South Korea;

    Seoul Natl Univ Sci & Technol, Grad Sch Energy & Environm, 232 Gongneung Ro, Seoul 139743, South Korea;

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