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首页> 外文期刊>ACS applied materials & interfaces >High-Performance Ga2O3 Anode for Lithium-Ion Batteries
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High-Performance Ga2O3 Anode for Lithium-Ion Batteries

机译：用于锂离子电池的高性能GA2O3阳极

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摘要

There is a great deal:of interest in developing battery systems that can exhibit self-healing behavior, thus enhancing cyclability and stability. Given that gallium. (Ga) is a metal that melts near room temperature, we wanted to test if it could be employed as a self-healing anode material for lithium ion batteries (LIBs). Hbwever, Ga nanoparticles (NPs), when directly applied, tended to aggregate upon charge/discharge cycling. Tp address this issue, we employed carbon-coated' Ga2O3 NPs as an alternative. By controlling the pH of 'the precursor solution, highly dispersed and, ultrafin-Ga2O3 NPs, embedded in carbon shells, could be synthesized through a hydrothermal carbonization method. The particle size of the NPs was 2.6 nm, with an extremely narrow size distribution, as determined by high-resolution transmission electron microscopy and Brunauer Emmettteller measurements. A lithium-ion battery anode based on this material exhibited stable charging and discharging, with a capacity of 721 mAh/g after 200 cycle's. The high cyclability is due to not only the protective effects of the carbon shell but also the formation of Ga during the lithiation process, as indicated by operando X-ray absorption near-edge spectroscopy.
机译：有很多优惠：在开发能够表现出自我愈合行为的电池系统中的兴趣，从而提高可靠性和稳定性。鉴于那镓。 （GA）是一种熔化在室温附近的金属，我们想测试它是否可以用作锂离子电池（LIBS）的自愈合阳极材料。直接施加的Hbwever，Ga纳米颗粒（NPS）倾向于在充电/放电循环时占聚。 TP解决此问题，我们将碳涂层的“GA2O3 NPS作为替代品。通过控制在碳壳中嵌入碳壳中的前体溶液，高度分散的和超高蛋白-Ga2O3 nps的pH可以通过水热碳化法合成。 NPS的粒度为2.6nm，具有极窄的尺寸分布，如通过高分辨率透射电子显微镜和Brunauer Emmetteller测量确定。基于该材料的锂离子电池阳极表现出稳定的充电和放电，其容量为200次循环后的721mAh / g。高可循环性是由于碳壳的保护作用，而且是在锂化过程中形成Ga的形成，如Outmando X射线吸收近边缘光谱所示。

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  • 作者

    Tang Xun; Huang Xin; Huang Yonmin; Gou Yong; Pastore James; Yang Yao; Xiong Yin; Qian Jiangfeng; Brock Joel D.; Lu Juntao; Xiao Li; Abruna Hector D.; Zhuang Lin;

  • 作者单位

    Wuhan Univ Hubei Key Lab Electrochem Power Sources Coll Chem &

    Mol Sci Wuhan 430072 Hubei Peoples R China;

    Cornell Univ Sch Appl &

    Engn Phys Ithaca NY 14853 USA;

    Wuhan Univ Hubei Key Lab Electrochem Power Sources Coll Chem &

    Mol Sci Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Hubei Key Lab Electrochem Power Sources Coll Chem &

    Mol Sci Wuhan 430072 Hubei Peoples R China;

    Cornell Univ Dept Chem &

    Chem Biol Ithaca NY 14853 USA;

    Cornell Univ Dept Chem &

    Chem Biol Ithaca NY 14853 USA;

    Cornell Univ Dept Chem &

    Chem Biol Ithaca NY 14853 USA;

    Wuhan Univ Hubei Key Lab Electrochem Power Sources Coll Chem &

    Mol Sci Wuhan 430072 Hubei Peoples R China;

    Cornell Univ Sch Appl &

    Engn Phys Ithaca NY 14853 USA;

    Wuhan Univ Hubei Key Lab Electrochem Power Sources Coll Chem &

    Mol Sci Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Hubei Key Lab Electrochem Power Sources Coll Chem &

    Mol Sci Wuhan 430072 Hubei Peoples R China;

    Cornell Univ Dept Chem &

    Chem Biol Ithaca NY 14853 USA;

    Wuhan Univ Hubei Key Lab Electrochem Power Sources Coll Chem &

    Mol Sci Wuhan 430072 Hubei 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

    gallium oxide; hydrothermal carbonization; self-healing lithium-ion batteries; anode materials;

    机译：氧化镓;水热碳化;自愈合锂离子电池;阳极材料;

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