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首页> 外文期刊>ACS applied materials & interfaces >One-Step In Situ Preparation of Polymeric Selenium Sulfide Composite as a Cathode Material for Enhanced Sodium/Potassium Storage
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One-Step In Situ Preparation of Polymeric Selenium Sulfide Composite as a Cathode Material for Enhanced Sodium/Potassium Storage

机译：用于增强钠/钾储存的阴极材料的聚合物硒硫化物复合材料的一步。

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摘要

Alkali metal-sulfur/selenium batteries have attracted much attention because they offer promising high energy density. However, the shuttle effect of the polysulfide dissolutions, poor electrical conductivity, and relatively large volume variations greatly hinder their potential applications. Herein, a novel organic carbon/selenium sulfide (OC/SeS2) composite has been prepared by a one-step in situ method by heating the mixture of commercial polyacrylonitrile (PAN) with selenium sulfide powder in vacuum. The carbonized PAN matrix with an N-doped carbon ring structure could effectively confine SeS2 in the form of small molecules and regulate its electronic structure. The superior sodium/potassium storage performance of the OC/SeS2 composite electrodes stems from their rational chemical structure design, including high electrical conductivity of the N-doped organic carbon network and. chemical binding with SeS2 molecules. As a result, the OC/SeS2 cathode delivers a reversible capacity of 416 mAh g(-1) after 700 cycles for sodium-ion batteries and 216 mAh g(-1) after 500 cycles for potassium-ion batteries at 0.5 A g(-1),respectively. These findings could open a new window to develop selenium sulfide cathode for metal-sulfur/selenium batteries.
机译：碱金属 - 硫/硒电池引起了很多关注，因为它们提供了有希望的高能量密度。然而，长硫化物溶解，导电性差和相对大的体积变化的梭效应极大地阻碍了它们的潜在应用。在此，通过在真空中加热商业聚丙烯腈（盘）的混合物，通过在真空中加热商业聚丙烯腈（盘）的混合物，通过一步地制备新的有机碳/硒硫化物（OC / SES2）复合材料。具有N掺杂碳环结构的碳化盘基质可以有效地限制小分子形式的SES2并调节其电子结构。 OC / SES2复合电极的卓越钠/钾储存性能源于其合理的化学结构设计，包括N掺杂有机碳网络的高电导率和。化学结合SES2分子。结果，OC / SES2阴极在700次循环的钠离子电池和216mAhg（-1）后提供416mAhg（-1）的可逆容量，在500℃的钾离子电池下为0.5克（ -1）分别。这些发现可以打开一个新的窗口，用于为金属 - 硫/硒电池开发硒硫化物阴极。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第33期|共7页
  • 作者

    Zhang Wenchao; Wang Hongqiang; Zhang Na; Liu Huaguang; Chen Zhuo; Zhang Lijuan; Guo Shaopeng; Li Dan; Xu Jianzhong;

  • 作者单位

    Hebei Univ Coll Chem &

    Environm Sci Key Lab Analyt Sci &

    Technol Hebei Prov Baoding 071002 Peoples R China;

    Hebei Univ Coll Chem &

    Environm Sci Key Lab Analyt Sci &

    Technol Hebei Prov Baoding 071002 Peoples R China;

    Hebei Univ Coll Chem &

    Environm Sci Key Lab Analyt Sci &

    Technol Hebei Prov Baoding 071002 Peoples R China;

    Hebei Univ Coll Chem &

    Environm Sci Key Lab Analyt Sci &

    Technol Hebei Prov Baoding 071002 Peoples R China;

    Hebei Univ Coll Chem &

    Environm Sci Key Lab Analyt Sci &

    Technol Hebei Prov Baoding 071002 Peoples R China;

    Univ Wollongong Inst Superconducting &

    Elect Mat Wollongong NSW 2522 Australia;

    Inner Mongolia Univ Sci &

    Technol Sch Energy &

    Environm Baotou 014010 Peoples R China;

    Zhengzhou Univ Coll Chem &

    Mol Engn Zhengzhou 450001 Henan Peoples R China;

    Hebei Univ Coll Chem &

    Environm Sci Key Lab Analyt Sci &

    Technol Hebei Prov Baoding 071002 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    polymeric selenium sulfide composite; cathode; ion diffusivity; sodium-ion batteries; potassium-ion batteries;

    机译：聚合物硒硫化物复合材料;阴极;离子扩散率;钠离子电池;钾离子电池;

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