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An Energy-Dense Solvent-Free Dual-Ion Battery

机译：一种能量致密的无溶剂双离子电池

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摘要

Ever-increasing energy demands call for alternative energy storage technologies with balanced performance and cost characteristics to meet current and emerging applications. Dual-ion batteries (DIBs) are considered particularly attractive owing to the potentially high specific energy, a rich variety of charge carrier combinations, and the applicability of metal-free cathode and earth-abundant anode materials. However, their performance falls far below expectations because of a large excess of solvent needed to dissolve electroactive species that induces side reactions and contributes parasitic weight, which penalizes the reversible capacity and cell-level energy density. Herein, a solvent-free DIB utilizing a binary alkali metal molten salt based on bis(fluorosulfonyl)amide as the electrolyte to solve these issues is demonstrated. The cell (NaK-DIB) operates in a temperature range of 90-120 degrees C and exhibits high theoretical energy densities of 246 Wh kg(-1)and 533 Wh L(-1)based on active materials and capacity-matched electrolyte, far surpassing those of reported DIBs. Further improvements could realize affordable grid-scale energy storage.
机译：不断增长的能源需求要求具有平衡性能和成本特性的替代能源存储技术，以满足当前和新兴应用。由于潜在的高能量，丰富的电荷载体组合，以及无金属阴极和地球 - 宽阳极材料的适用性，两离子电池（DIBs）被认为特别有吸引力。然而，它们的性能远远低于预期，因为溶解诱导副反应的电活性物质所需的大量溶剂并有助于寄生物重量，这惩罚了可逆能力和细胞级能量密度。这里，证明了利用基于双（氟磺酰基）酰胺的二元碱金属熔融盐作为用于解决这些问题的电解质的无溶剂DIB。电池（NaK-Dib）在90-120℃的温度范围内操作，并且基于活性材料和容量匹配的电解质表现出246WH kg（-1）和533WH（-1）的高理论能量密度，远远超过报告的dibs。进一步的改进可以实现经济实惠的网格级能量存储。

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  • 来源
    《Advanced Functional Materials》 |2020年第39期|2003557.1-2003557.8|共8页
  • 作者

    Chen Chih-Yao; Matsumoto Kazuhiko; Kubota Keigo; Hagiwara Rika; Xu Qiang;

  • 作者单位

    Kyoto Univ Natl Inst Adv Ind Sci & Technol AIST Chem Energy Mat Open Innovat Lab ChEM OIL AIST Sakyo Ku Kyoto 6068501 Japan;

    Kyoto Univ Natl Inst Adv Ind Sci & Technol AIST Chem Energy Mat Open Innovat Lab ChEM OIL AIST Sakyo Ku Kyoto 6068501 Japan|Kyoto Univ Grad Sch Energy Sci Sakyo Ku Kyoto 6068501 Japan;

    Kyoto Univ Natl Inst Adv Ind Sci & Technol AIST Chem Energy Mat Open Innovat Lab ChEM OIL AIST Sakyo Ku Kyoto 6068501 Japan|Natl Inst Adv Ind Sci & Technol Res Inst Electrochem Energy Ikeda Osaka 5638577 Japan;

    Kyoto Univ Natl Inst Adv Ind Sci & Technol AIST Chem Energy Mat Open Innovat Lab ChEM OIL AIST Sakyo Ku Kyoto 6068501 Japan|Kyoto Univ Grad Sch Energy Sci Sakyo Ku Kyoto 6068501 Japan;

    Kyoto Univ Natl Inst Adv Ind Sci & Technol AIST Chem Energy Mat Open Innovat Lab ChEM OIL AIST Sakyo Ku Kyoto 6068501 Japan|Natl Inst Adv Ind Sci & Technol Res Inst Electrochem Energy Ikeda Osaka 5638577 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    dual-ion batteries; ionic liquid electrolytes; liquid metals; molten salt electrolytes; Na-K alloys;

    机译：双离子电池;离子液体电解质;液态金属;熔融盐电解质;Na-K合金;

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