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Revisiting the open-framework zinc hexacyanoferrate: The role of ternary electrolyte and sodium-ion intercalation mechanism

机译:回顾开放式六氰合铁酸锌:三元电解质和钠离子嵌入机制的作用

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摘要

Non-flammable rechargeable aqueous sodium-ion batteries (RASB) made from natural abundant resources offer promising opportunities in large-scale energy storage, yet the low energy density as well as low voltage output and the limited cycle life hinder their practical applications. Here, we develop a high-voltage RASB based on rhombohedral zinc hexacyanoferrate as cathode materials, carbon-coated NaTi2(PO4)(3) as anode materials and ternary NaClO4-H2O-polyethylene glycol (Na-H2O-PEG) as electrolyte to overcome these drawbacks. Such an RASB can deliver a high voltage output of 1.6 V with a specific energy density of 59 Wh kg(-1) based on the total mass of active electrode materials. In addition, it possesses an excellent rate capability as an ultra-capacitor (2.7 kW kg(-1)). The capacity retention more than 91% is obtained after 100 cycles. Finally, a reversible phase transformation between rhombohedral Zn-3[Fe(CN)(6)](2) and rhombohedral Na2Zn3[Fe(CN)(6)](2) that are accompanied by the insertion/extraction of sodium ion in zinc hexacyanoferrate is unveiled.
机译:由自然丰富的资源制成的不可燃可充电钠离子电池(RASB)在大规模储能方面提供了广阔的机遇,但是低能量密度,低电压输出和有限的循环寿命阻碍了它们的实际应用。在这里,我们开发了一种基于六面铁酸六面体高铁酸锌作为正极材料,碳包覆的NaTi2(PO4)(3)作为负极材料以及三元NaClO4-H2O-聚乙二醇(Na-H2O-PEG)电解质的高压RASB,以克服这些弊端。基于活性电极材料的总质量,这样的RASB可以提供1.6 V的高电压输出,比能量密度为59 Wh kg(-1)。此外,它具有出色的速率能力,可作为超级电容器(2.7 kW kg(-1))。 100次循环后,容量保持率超过91%。最后,菱形Zn-3 [Fe(CN)(6)](2)和菱形Na2Zn3 [Fe(CN)(6)](2)之间的可逆相变,伴随着钠离子的插入/萃取。六氰合铁酸锌问世。

著录项

  • 来源
    《Journal of power sources》 |2018年第15期|135-141|共7页
  • 作者单位

    Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Graphene Technol & Applicat Zhejiang Prov, Ningbo 315201, Zhejiang, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Graphene Technol & Applicat Zhejiang Prov, Ningbo 315201, Zhejiang, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Graphene Technol & Applicat Zhejiang Prov, Ningbo 315201, Zhejiang, Peoples R China;

    Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Graphene Technol & Applicat Zhejiang Prov, Ningbo 315201, Zhejiang, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Open-framework; Ternary electrolyte; Aqueous sodium-ion battery; Intercalation mechanism;

    机译:开放式框架;三元电解质;钠离子电池;嵌入机制;
  • 入库时间 2022-08-18 00:21:23

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