• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Ultrathin and Non-Flammable Dual-Salt Polymer Electrolyte for High-Energy-Density Lithium-Metal Battery
【24h】

Ultrathin and Non-Flammable Dual-Salt Polymer Electrolyte for High-Energy-Density Lithium-Metal Battery

机译：用于高能密度锂金属电池的超薄和不易燃双盐聚合物电解质

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Rechargeable batteries with Li-metal anodes and Ni-rich LiNixMnyCozO2 (x + y + z = 1, NMC) cathodes promise high-energy-density storage solutions. However, commercial carbonate-based electrolytes (CBEs) induce deteriorative interfacial reactions to both Li-metal and NMC, leading to Li dendrite formation and NMC degradation. Moreover, CBEs are thermally unstable and flammable, demonstrating severe safety risks. In this study, an ultrathin and non-flammable dual-salt polymer electrolyte (DSPE) is proposed via lightweight polytetrafluoroethylene scaffold, poly(vinylidene fluoride-co-hexafluoropropylene) polymeric matrix, dual-salt, and adiponitrile/fluoroethylene carbonate functional plasticizers. The as-obtained DSPE exhibits an ultralow thickness of 20 mu m, high room temperature ionic conductivity of 0.45 mS cm(-1), and a large electrochemical window (4.91 V versus Li/Li+). The dual-salt synergized with functional plasticizers is used to fabricate a stable interface layer on both anode and cathode. In-depth experimental and theoretical analyses have revealed the formation of stable interfaces between the DSPE and the anode/cathodes. As a result, the DSPE effectively prevents Li/DSPE/Li symmetric cell from short-circuiting after 1200 h, indicating effective suppression of Li dendrites. Moreover, the Li/DSPE/NMC cell delivers outstanding cyclic stability at 2 C, maintaining a high capacity of 112 mAh g(-1) over 1000 cycles.
机译：带有Li-Metal Anodes和Ni-Linixmnycozo2（X + Y + Z = 1，NMC）阴极的可充电电池可以承诺高能密度存储解决方案。然而，商业碳酸盐基电解质（CBE）诱导Li金属和NMC的劣化界面反应，导致Li Dendrite形成和NMC降解。此外，CBE是热不稳定和易燃的，展示严重的安全风险。在该研究中，通过轻质的聚四氟乙烯支架，聚（偏二氟乙烯 - 共六氟丙烯）聚合物基质，双盐和己二腈/氟乙基碳酸酯官能增塑剂提出了超薄和不易燃的双盐聚合物电解质（DSPE）。如所获得的DSPE表现出20μm的超级厚度，高室温离子电导率为0.45ms cm（-1）和大电化学窗口（4.91V与Li / Li +）。用功能性增塑剂协同的双盐用于在阳极和阴极上制造稳定的界面层。深入的实验和理论分析揭示了DSPE和阳极/阴极之间的稳定界面的形成。结果，DSPE有效地防止了1200小时后从短路中进行的Li / DSPE / Li对称细胞，表明有效抑制Li Dendrites。此外，Li / DSPE / NMC电池在2℃下提供出色的循环稳定性，高容量超过1000个循环的112mAhg（-1）。

著录项

  • 来源
    《Advanced Functional Materials》 |2021年第17期|2010261.1-2010261.8|共8页
  • 作者

    Lin Xidong; Yu Jing; Effat Mohammed B.; Zhou Guodong; Robson Matthew J.; Kwok Stephen C. T.; Li Haijun; Zhan Shiying; Shang Yongliang; Ciucci Francesco;

  • 作者单位

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China|Assiut Univ Dept Mech Engn Assiut 71516 Egypt;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China|Guangzhou HKUST Fok Ying Tung Res Inst Guangzhou 511458 Peoples R China;

    Yinlong Energy Co Ltd Zhuhai 519015 Peoples R China;

    Yinlong Energy Co Ltd Zhuhai 519015 Peoples R China;

    Yinlong Energy Co Ltd Zhuhai 519015 Peoples R China;

    Hong Kong Univ Sci & Technol Dept Mech & Aerosp Engn Hong Kong Peoples R China|Guangzhou HKUST Fok Ying Tung Res Inst Guangzhou 511458 Peoples R China|Hong Kong Univ Sci & Technol Dept Chem & Biol Engn Hong Kong Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    high#8208; energy#8208; density; lithium#8208; metal batteries; non#8208; flammable; polymer electrolytes; ultrathin dual#8208; salt polymer electrolyte;

    机译：高＆＃8208;能量＆＃8208;密度;锂＆＃8208;金属电池;非＆＃8208;易燃;聚合物电解质;超薄双＆＃8208;盐聚合物电解质;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号