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首页> 外文期刊>Advanced energy materials >Water-Soluble Salt Template-Assisted Anchor of Hollow FeS_2 Nanoparticle Inside 3D Carbon Skeleton to Achieve Fast Potassium-Ion Storage
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Water-Soluble Salt Template-Assisted Anchor of Hollow FeS_2 Nanoparticle Inside 3D Carbon Skeleton to Achieve Fast Potassium-Ion Storage

机译：中空FES_2纳米粒子的水溶性盐模板辅助锚固3D碳骨架内达到快速钾离子储存

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摘要

The rationally structural engineering is an efficient strategy to improve the comprehensive performance of potassium-ion storage anode materials. In this paper, a hybrid with hollow FeS2 nanoparticles anchored into the 3D carbon skeleton (labeled as H-FeS2@3DCS) is successfully constructed through two critical steps of in situ chemical deposition and anion-exchange reaction strategies. In the former, the water-soluble Na2CO3 crystals are used as hard templates for the preparation of 3DCS, while Fe3+-containing aqueous solutions are utilized to remove the Na2CO3 templates. Interestingly, the intense collision between Fe3+ and CO32- in aqueous solution produces nanoscale Fe(OH)(3) colloidal particles, which are firmly anchored into the pores of the carbon skeleton to form a "lotus-seed"-like nanostructure. In the latter case, a central void space is created inside the FeS2 nanoparticles due to the different diffusion rates of S-anions and Fe-cations during the subsequent sulfidation process. Thanks to this unique composition model, the H-FeS2@3DCS hybrid not only alleviates the volume expansion efficiently by rationally hollow structure design, but also provides spacious "roads" (3D carbon skeleton) and "houses" (hollow FeS2 nanoparticles) for fast K-ion transition and storage. As the anode of PIBs and PIHCs, the resultant H-FeS2@3DCS electrode delivers an obviously enhanced K-ions storage performance over state-of-the-art.
机译：合理的结构工程是提高钾离子储存阳极材料的综合性能的有效策略。在本文中，通过原位化学沉积和阴离子交换反应策略的两个临界步骤成功地构建了一种锚固到3D碳骨架中的中空FES2纳米颗粒的杂交体，通过两种临界步骤成功地构建。在前者中，水溶性Na 2 CO 3晶体用作制备3DC的硬模板，而Fe3 + - 甲型水溶液用于除去Na 2 CO 3模板。有趣的是，Fe3 +和CO32-在水溶液之间的强烈碰撞产生纳米级Fe（OH）（3）粒状颗粒，其牢固地锚固到碳骨架的孔中以形成“莲子种子”的纳米结构。在后一种情况下，由于在随后的硫化过程中的S阴离子和Fe-阳离子的不同扩散速率，在FES2纳米颗粒内产生中央空隙空间。由于这种独特的成分模型，H-FES2 @ 3DCS混合动力器不仅可以通过合理的空心结构设计减轻了高效的音量扩展，而且还提供了宽敞的“道路”（3D碳骨架）和“房屋”（空心FES2纳米粒子）的快速K离子过渡和储存。作为PIBS和PIHC的阳极，所得到的H-FES2 @ 3DCS电极通过最先进的k-ions储存性能提供明显增强的k型储存性能。

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  • 来源
    《Advanced energy materials》 |2021年第33期|2101343.1-2101343.12|共2页
  • 作者

    Cui Yongpeng; Feng Wenting; Wang Dandan; Wang Yesheng; Liu Wei; Wang Huanlei; Jin Yongcheng; Yan Youguo; Hu Han; Wu Mingbo; Xue Qingzhong; Yan Zifeng; Xing Wei;

  • 作者单位

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

    Ocean Univ China Sch Mat Sci & Engn Qingdao 266100 Peoples R China;

    Ocean Univ China Sch Mat Sci & Engn Qingdao 266100 Peoples R China;

    Ocean Univ China Sch Mat Sci & Engn Qingdao 266100 Peoples R China;

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

    China Univ Petr East China State Key Lab Heavy Oil Proc Sch Mat Sci & Engn Qingdao 266580 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    carbon skeleton; FeS; (2) nanoparticles; potassium ion storage; salt template; structural engineering;

    机译：碳骨架;FES;（2）纳米颗粒;钾离子储存;盐模板;结构工程;

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