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首页> 外文期刊>Advanced energy materials >Double-Shelled NiO-NiCo_2O_4 Heterostructure@Carbon Hollow Nanocages as an Efficient Sulfur Host for Advanced Lithium–Sulfur Batteries
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Double-Shelled NiO-NiCo_2O_4 Heterostructure@Carbon Hollow Nanocages as an Efficient Sulfur Host for Advanced Lithium–Sulfur Batteries

机译：双壳NiO-NiCo_2O_4异质结构@碳空心纳米笼作为高级锂硫电池的高效硫基质

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摘要

Double-shelled NiO-NiCo2O4 heterostructure@carbon hollow nanocages as efficient sulfur hosts are synthesized to overcome the barriers of lithium-sulfur (Li-S) batteries simultaneously. The double-shelled nanocages can prevent the diffusion of lithium polysulfides (LiPSs) effectively. NiO-NiCo2O4 heterostructure is able to promote polysulfide conversion reactions. Furthermore, the thin carbon layer outside can improve the electrical conductivity during cycling. Besides, such unique double-shelled hollow nanocage architecture can also accommodate the volumetric effect of sulfur upon cycling. As a result, the prepared S/NiO-NiCo2O4@carbon (C) electrode exhibits good rate capacities and stable cycling life up to 500 cycles at 0.5 C with a very low capacity decay rate of only approximate to 0.059% per cycle.
机译：合成了双壳NiO-NiCo2O4杂化结构@碳空心纳米笼作为有效的硫主体，可同时克服锂硫（Li-S）电池的障碍。双壳纳米笼可以有效地防止多硫化锂（LiPSs）的扩散。 NiO-NiCo2O4异质结构能够促进多硫化物转化反应。此外，外部的薄碳层可以改善循环过程中的导电性。此外，这种独特的双壳中空纳米笼结构还可以适应循环时硫的体积效应。结果，所制备的S / NiO-NiCo 2 O 4碳（C）电极在0.5C下表现出良好的倍率容量和高达500次循环的稳定循环寿命，并且极低的容量衰减率仅为每循环约0.059％。

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  • 来源
    《Advanced energy materials》 |2018年第23期|1800709.1-1800709.8|共8页
  • 作者

    Hu Linyu; Dai Chunlong; Liu Heng; Li Yi; Shen Bolei; Chen Yuming; Bao Shu-Juan; Xu Maowen;

  • 作者单位

    Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China;

    Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China;

    Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China;

    Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China;

    Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China;

    MIT, Dept Mat Sci & Engn, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA;

    Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China;

    Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    double-shelled hollow nanocages; heterostructures; lithium-sulfur batteries; NiO-NiCo2O4; reaction kinetics;

    机译：双壳空心纳米笼;异质结构;锂硫电池;NiO-NiCo2O4;反应动力学;

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