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首页> 外文期刊>ACS applied materials & interfaces >Rational Construction of a Binder-Free and Universal Electrode for Stable and Fast Alkali-Ion Storage
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Rational Construction of a Binder-Free and Universal Electrode for Stable and Fast Alkali-Ion Storage

机译：用于稳定和快速碱离子储存的无合物和通用电极的合理构建

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摘要

Na-ion batteries (SIBs) and K-ion batteries (PIBs) are considered as promising alternatives to Li-ion batteries (LIBs) for large-scale electrical-energy-storage applications. Thus, developing an advanced anodic material with appropriate structure for both SIBs and PIBs is urgently desirable but remains an eager challenge because of the relatively large ionic radius of Na~(+) or K~(+). Herein, we rationally design a sulfur-mediated three-dimensional graphene aerogel (SMGA) with plant cell wall structure as a binder-free anodic material for SIBs and PIBs as well as LIBs, exhibiting high capacity and excellent rate capability along with long cycling stability. For instance, at 0.1 A g~(–1), the SMGA anodes can deliver a high capacity of 320 mAh g~(–1) in PIBs after 500 cycles and 304 mAh g~(–1) in SIBs and 690 mAh g~(–1) in LIBs after 200 cycles. Furthermore, a detailed electrochemical kinetic calculation manifests that the Li/Na/K-ion storage capability is mainly ascribed to the introduction of sulfur in graphene aerogel (GA) to enlarge the interlayer distance, the three-dimensional interconnected network with porous structure providing sufficient space to accommodate volumetric expansion, and a short transport pathway for electrons/alkali-ions. Our results demonstrate the advanced performance of alkali-ion batteries, thus making it possible to develop a universal electrode for applications of cost-effective next-generation rechargeable batteries.
机译：Na离子电池（SIBS）和K离子电池（PIB）被认为是对大型电能 - 储存应用的锂离子电池（LIBS）的有前途的替代品。因此，迫切需要开发具有适当结构的先进的阳极材料，并且迫切需要，但由于Na〜（+）或K〜（+）的相对大的离子半径仍然是急生而明的攻击。在此，我们将含硫介导的三维石墨烯气凝胶（SMGA）与植物细胞壁结构设计为用于SIB和PIB的无粘合剂阳极材料，以及LIBS，具有高容量和优异的速率能力以及长的循环稳定性。例如，在0.1Ag〜（-1）时，SMGA阳极可以在500次循环和304mah g〜（-1）中的PIB中提供高容量的320mAh g〜（-1），并且在SIBs和690mah g 〜（-1）在200次循环后的libs中。此外，详细的电化学动力学计算表现为Li / Na / K离子储存能力主要归因于石墨烯气凝胶（GA）中的硫的引入，以扩大层间距离，三维互连网络具有多孔结构提供足够的空间容纳体积膨胀，以及电子/碱金属离子的短传输途径。我们的结果表明了碱离子电池的先进性能，从而使得可以开发通用电极，以便具有成本效益的下一代可充电电池的应用。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第43期|共8页
  • 作者

    Yahui Zhao; Jiafeng Ruan; Sainan Luo; Hao Sun; Yuepeng Pang; Junhe Yang; Shiyou Zheng;

  • 作者单位

    School of Materials Science and Engineering University of Shanghai for Science and Technology;

    School of Materials Science and Engineering University of Shanghai for Science and Technology;

    School of Materials Science and Engineering University of Shanghai for Science and Technology;

    School of Materials Science and Engineering University of Shanghai for Science and Technology;

    School of Materials Science and Engineering University of Shanghai for Science and Technology;

    School of Materials Science and Engineering University of Shanghai for Science and Technology;

    School of Materials Science and Engineering University of Shanghai for Science and Technology;

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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

    battery; binder-free; anode; sulfur; graphene;

    机译：电池;无粘合剂;阳极;硫;石墨烯;

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