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首页> 外文期刊>Advanced energy materials >A High-Capacity, Long-Cycling All-Solid-State Lithium Battery Enabled by Integrated Cathode/Ultrathin Solid Electrolyte
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A High-Capacity, Long-Cycling All-Solid-State Lithium Battery Enabled by Integrated Cathode/Ultrathin Solid Electrolyte

机译：通过集成阴极/超固体电解质实现的高容量，长循环的全固态锂电池

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摘要

Current all-solid-state lithium battery (ASSLB) manufacturing typically involves laborious fabrication and assembly of individual electrodes and solid electrolyte, which inevitably result in large interfacial resistances. Moreover, due to the unfavorable mechanical strength, most solid electrolytes are fabricated to be overly thick and are incapable of retarding lithium dendrite formation. These factors limit the attainable energy density and cyclability of ASSLBs. Here, a novel integrated cathode/solid electrolyte for scalable ASSLB manufacturing is reported by directly fabricating an ultrathin yet robust fiber network reinforced solid electrolyte on the cathode. The integrated design allows continuous ion conduction at both the interface and the entire cathode, thereby considerably reducing interfacial resistance and enabling higher cathode loading. Meanwhile, the strong fiber network endows the solid electrolyte with an ultrasmall thickness and superior dendrite suppression capability. As a result, the newly-developed Li/LiFePO4 ASSLB achieves a high capacity of 155.2 mAh g(-1) at 0.5 C and 45 degrees C with capacity retention of 84.3% after 500 cycles. Even with a cathode loading of 13 mg cm(-2), the battery still delivers a capacity of 124.1 mAh g(-1). Additionally, a pouch cell with this integrated design displays good electrochemical performance and safety, showing great promise for practical applications.
机译：目前的全固态锂电池（ASSLB）制造通常涉及单独电极和固体电解质的费力制造和组装，这不可避免地导致大的界面电阻。此外，由于不利的机械强度，制造大多数固体电解质以越厚，并且不能延迟锂枝晶形成。这些因素限制了Asslbs的可达到的能量密度和可阻碍性。这里，通过直接在阴极上直接制造超薄又强大的纤维网络增强固体电解质来报告用于可伸缩ASSLB制造的新型集成阴极/固体电解质。综合设计允许在界面和整个阴极上连续离子传导，从而显着降低界面抗性并实现更高的阴极载荷。同时，强纤维网络具有超大厚度和优异的树突抑制能力的固体电解质。结果，新开发的Li / Lifepo4 AsslB在0.5℃和45摄氏度下实现了155.2mahg（-1）的高容量，在500次循环后容量保持84.3％。即使具有13mg cm（-2）的阴极负载，电池仍可提供124.1mahg（-1）的容量。此外，具有这种集成设计的袋电池显示出良好的电化学性能和安全性，对实际应用表示了很大的承诺。

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  • 来源
    《Advanced energy materials》 |2021年第35期|2101612.1-2101612.9|共9页
  • 作者

    Lin Yanke; Wu Maochun; Sun Jing; Zhang Leicheng; Jian Qinping; Zhao Tianshou;

  • 作者单位

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol HKUST Energy Inst Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol HKUST Energy Inst Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol HKUST Energy Inst Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol HKUST Energy Inst Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol HKUST Energy Inst Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol HKUST Energy Inst Hong Kong 999077 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    ASSLBs; high cathode loading; interfaces; scalable manufacturing; ultrathin solid electrolytes;

    机译：ASSLBS;高阴极加载;界面;可扩展的制造;超薄固体电解质;

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