• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Flexible Electrocatalytic Nanofiber Membrane Reactor for Lithium/Sulfur Conversion Chemistry
【24h】

Flexible Electrocatalytic Nanofiber Membrane Reactor for Lithium/Sulfur Conversion Chemistry

机译：用于锂/硫转换化学的柔性电催化纳米纤维膜反应器

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

Severe lithium polysulfide (LiPS) shuttle effects and sluggish electrochemical conversion kinetics constitute bottlenecks in developing fast-rechargeable, high-energy, and high-power Li/S batteries. Here, a flexible and conductive TiN-Ti4O7 core-shell nanofiber (TiNOC) membrane reactor is designed to electrocatalytically mediate Li/S conversion chemistry. The Ti, N, and O atoms in the nanofiber function as electrocatalysts and chemical confinement active sites to initiate long-chain LiPS conversion and phase change, as well as to suppress soluble LiPS shuttling. With a sulfur cathode-membrane reactor module configuration, Li/S cells possess a high sulfur utilization of 91.20%, good rate capability of 869.10 mA h g(-1), and high capacity retention of 92.49%, with a coulomb efficiency of 99.57% after 200 cycles at 5 C. Density functional theory (DFT) calculations revealed that the optimized chemisorption configurations facilitate the elongation of Li-S and S-S bonds, as well as charge transfer along Ti-S and Li-N bonds, which favors bond breakage, bond formation, and the activation of solid-state S-8, Li2S2, and Li2S. Layer-by-layer module stacking provides Li/S batteries with a high areal sulfur loading of 12.00 mg cm(-2) to deliver a high areal capacity of 14.40 mA h cm(-2) at 2.26 mA. Two batteries in series can power real-world applications such as light emitting diode (LED) bulbs with a high energy output of 69.00 mW h.
机译：严重锂多硫化物（嘴唇）梭效果和缓慢的电化学转换动力学构成开发快速充电，高能量和高功率LI / S电池的瓶颈。这里，设计柔性和导电锡 - Ti4O7核 - 壳纳米纤维（TINOC）膜反应器，用于电催化介导LI / S转化化学。纳米潜纤维中的Ti，N和O原子用作电催化剂和化学禁闭活性位点，以启动长链唇缘转换和相变，以及抑制可溶性嘴唇梭子。含硫阴极 - 膜反应器模块构造，LI / S细胞具有高硫磺利用率为91.20％，良好的速率能力为869.10 mA hg（-1），高容量保留为92.49％，oulomb效率为99.57％在5℃的200次循环之后。密度函数理论（DFT）计算显示，优化的化学吸取配置有助于Li-S和SS键的伸长，以及沿Ti-S和Li-N键的电荷转移，从而利用粘合粘合，键形成，以及固态S-8，Li2S2和Li2s的活化。逐层模块堆叠为Li / S电池提供12.00mg cm（-2）的高面制硫负载，以在2.26 mA的高度为14.40mA hcm（-2）的高度面积容量。两节串联电池可以电源现实世界的应用，例如发光二极管（LED）灯泡，高能量输出为69.00 MW H。

著录项

  • 来源
    《Advanced Functional Materials》 |2020年第28期|1910533.1-1910533.12|共12页
  • 作者

    Ji Lei; Wang Xia; Jia Yongfeng; Hu Quanli; Duan Limei; Geng Zhibin; Niu Zhiqiang; Li Weishan; Liu Jinghai; Zhang Yuegang; Feng Shouhua;

  • 作者单位

    South China Normal Univ Sch Chem Guangzhou 510000 Peoples R China|Inner Mongolia Univ Nationalities Coll Chem & Mat Sci Inner Mongolia Key Lab Carbon Nanomat Nano Innova Tongliao 028000 Peoples R China;

    Inner Mongolia Univ Nationalities Coll Chem & Mat Sci Inner Mongolia Key Lab Carbon Nanomat Nano Innova Tongliao 028000 Peoples R China;

    Inner Mongolia Univ Nationalities Coll Chem & Mat Sci Inner Mongolia Key Lab Carbon Nanomat Nano Innova Tongliao 028000 Peoples R China;

    Inner Mongolia Univ Nationalities Coll Chem & Mat Sci Inner Mongolia Key Lab Carbon Nanomat Nano Innova Tongliao 028000 Peoples R China;

    Inner Mongolia Univ Nationalities Coll Chem & Mat Sci Inner Mongolia Key Lab Carbon Nanomat Nano Innova Tongliao 028000 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Inorgan Synth & Preparat Chem Changchun 130012 Peoples R China;

    Nankai Univ Coll Chem Renewable Energy Convers & Storage Ctr Key Lab Adv Energy Mat Chem Minist Educ Tianjin 300071 Peoples R China;

    South China Normal Univ Sch Chem Guangzhou 510000 Peoples R China;

    Inner Mongolia Univ Nationalities Coll Chem & Mat Sci Inner Mongolia Key Lab Carbon Nanomat Nano Innova Tongliao 028000 Peoples R China;

    Tsinghua Univ Dept Phys Beijing 100084 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Inorgan Synth & Preparat Chem Changchun 130012 Peoples R China;

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

    chemisorption and electrocatalysis; conversion chemistry; Li; S batteries; membrane reactors; TiN-Ti4O7 core-shell nanofibers;

    机译：化学吸附和电催化;转化化学;李氏电池;膜反应器;锡 - Ti4O7核 - 壳纳料;

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