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首页> 外文期刊>Advanced Functional Materials >Emerging Dual-Channel Transition-Metal-Oxide Quasiaerogels by Self-Em bedded Templating
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Emerging Dual-Channel Transition-Metal-Oxide Quasiaerogels by Self-Em bedded Templating

机译：新兴的双通道过渡金属氧化物Quasierogels通过自我嵌入床模板

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摘要

The lack of precise control of particle sizes is the critical challenge in the assembly of 3D interconnected transition-metal oxide (TMO) for newly-emerging energy conversion devices. A self-embedded templating strategy for preparing the TMO@carbon quasiaerogels (TMO@C-QAs) is proposed. By mimicking an aerogel structure at a microscale, the TMO@C-QA successfully assembles size-controllable TMO nanoparticles into 3D interconnected structure with surface-enriched carbon species. The morphological evolutions of intermediates verify that the self-embedded Ostwald ripening templating approach is responsible for the dual-channel TMO@C-QA formation. The general self-embedded templating strategy is easily extended to prepare various TMO@C-QAs, including the Co3O4@C-QA, Mn3O4@C-QA, Fe2O3@C-QA, and NiO@C-QA. Benefiting from the unparalleled 3D interconnected network of aerogels, the Co3O4@C-QA displays superior bifunctional catalytic activities for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), as well as high specific capacity and excellent long-term stability for lithium-ion battery (LIB) anode. A proof-of-concept battery-powered electrolyzer with Co3O4@C-QA cathode and anode powered by a full LIB with Co3O4@C-QA anode is presented. The battery-powered electrolyzer made of the state-of-the-art TMOs can exhibit great competitive advantages due to its supreme multifunctional energy conversion performance for future water electrolysis.
机译：在为新兴的能量转换设备组装3D互连过渡金属氧化物（TMO）时，缺乏对粒度的精确控制是至关重要的挑战。提出了一种用于制备TMO @碳准气凝胶（TMO @ C-QAs）的自嵌入模板策略。通过在微观尺度上模拟气凝胶结构，TMO @ C-QA成功地将尺寸可控的TMO纳米颗粒组装成具有表面富集碳物质的3D互连结构。中间体的形态演变证明，自嵌入的奥斯特瓦尔德成熟模板方法是双通道TMO @ C-QA形成的原因。通用的自我嵌入模板策略可以轻松扩展以制备各种TMO @ C-QA，包括Co3O4 @ C-QA，Mn3O4 @ C-QA，Fe2O3 @ C​​-QA和NiO @ C-QA。得益于无与伦比的3D气凝胶互连网络，Co3O4 @ C-QA对氧气析出反应（OER）和氢气析出反应（HER）表现出优异的双功能催化活性，以及​​对锂的高比容量和出色的长期稳定性离子电池（LIB）阳极。提出了一种概念验证的电池供电的电解槽，该电解槽具有Co3O4 @ C-QA阴极，阳极由带有LI3的完整LiB供电，并带有Co3O4 @ C-QA阳极。由最先进的TMO制成的电池供电的电解槽具有极好的竞争优势，这是因为它具有用于未来水电解的卓越的多功能能量转换性能。

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  • 来源
    《Advanced Functional Materials》 |2020年第15期|2000024.1-2000024.11|共11页
  • 作者

    Guo Hele; Zhou Jun; Li Qianqian; Li Yueming; Zong Wei; Zhu Jixin; Xu Jingsan; Zhang Chao; Liu Tianxi;

  • 作者单位

    Donghua Univ Coll Mat Sci & Engn State Key Lab Modificat Chem Fibers & Polymer Mat Shanghai 201620 Peoples R China|Jiangnan Univ Sch Chem & Mat Engn Minist Educ Key Lab Synthet & Biol Colloids Wuxi 214122 Jiangsu Peoples R China;

    Donghua Univ Coll Mat Sci & Engn State Key Lab Modificat Chem Fibers & Polymer Mat Shanghai 201620 Peoples R China;

    Northwestern Polytech Univ Shaanxi Inst Flexible Elect 127 West Youyi Rd Xian 710072 Peoples R China;

    Queensland Univ Technol Sch Chem Phys & Mech Engn Brisbane Qld 4001 Australia;

    Donghua Univ Coll Mat Sci & Engn State Key Lab Modificat Chem Fibers & Polymer Mat Shanghai 201620 Peoples R China|Jiangnan Univ Sch Chem & Mat Engn Minist Educ Key Lab Synthet & Biol Colloids Wuxi 214122 Jiangsu Peoples R China|Zhengzhou Univ Minist Educ Key Lab Mat Proc & Mold Zhengzhou 450002 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    dual-channel heterostructures; quasiaerogels; self-embedded templating; transition-metal oxides; water electrolysis;

    机译：双通道异质结构;准气凝胶;自我嵌入的模板;过渡金属氧化物;水电解;

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