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首页> 外文期刊>Advanced Functional Materials >Controllable Urchin-Like NiCo_2S_4 Microsphere Synergized with Sulfur-Doped Graphene as Bifunctional Catalyst for Superior Rechargeable Zn-Air Battery
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Controllable Urchin-Like NiCo_2S_4 Microsphere Synergized with Sulfur-Doped Graphene as Bifunctional Catalyst for Superior Rechargeable Zn-Air Battery

机译：硫掺杂石墨烯协同可控的Urchin样NiCo_2S_4微球作为双功能催化剂，用于高级可充电锌空气电池

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摘要

Rechargeable zinc-air batteries (ZnABs) are attracting great interest due to their high theoretical specific energy, safety, and economic viability. However, their performance and large-scale practical applications are largely limited by poor durability and high overpotential on the air-cathode due to the slow kinetics of the oxygen reduction and evolution reactions (ORR/OER). Therefore, it is highly desired to exploit an ideal bifunctional catalyst to endow the obtained ZnABs with excellent ORR/OER catalytic performances. Herein, a new nonprecious-metal bifunctional catalyst of urchin-like NiCo2S4 microsphere synergized with sulfur-doped graphene nanosheets (S-GNS/NiCo2S4) is controllably designed and synthesized by simply tailoring the structure and electronic arrangement, which endow the as-prepared catalyst with excellent electroactivity and long-term durability toward ORR and OER. Importantly, ZnABs constructed by this outstanding catalyst exhibit high power density, small charge/discharge voltage gap, and excellent cycle stability, notably outperforming the more costly commercial Pt/C + Ir/C mixture catalyst. These excellent electrocatalytic performances together with the simplicity of the synthetic method, make the urchin-like NiCo2S4 microsphere/S-GNS hybrid nanostructure exhibit great promise as a superior air-cathode catalyst for high-performance rechargeable ZnABs.
机译：可充电锌空气电池（ZnABs）由于其较高的理论比能，安全性和经济可行性而引起了人们的极大兴趣。但是，由于氧气还原和放出反应（ORR / OER）的动力学缓慢，耐用性差和空气阴极上的高过电势极大地限制了它们的性能和大规模的实际应用。因此，非常需要开发一种理想的双功能催化剂，以使所获得的ZnAB具有优异的ORR / OER催化性能。在此，通过简单地调整结构和电子结构，可控地设计合成了一种新型的与硫掺杂的石墨烯纳米片协同合成的顽童状NiCo2S4微球非贵金属双功能催化剂，为制备的催化剂提供了条件。具有出色的电活性和对ORR和OER的长期耐久性。重要的是，由这种出色的催化剂构成的ZnAB表现出高功率密度，小的充电/放电电压间隙和出色的循环稳定性，尤其是优于价格更高的商用Pt / C + Ir / C混合催化剂。这些出色的电催化性能以及合成方法的简便性，使这种顽固的类NiCo2S4微球/ S-GNS杂化纳米结构作为高性能可充电ZnAB的优异空气阴极催化剂具有广阔的前景。

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  • 来源
    《Advanced Functional Materials》 |2018年第11期|1706675.1-1706675.11|共11页
  • 作者

    Liu Wenwen; Zhang Jing; Bai Zhengyu; Jiang Gaopeng; Li Matthew; Feng Kun; Yang Lin; Ding Yuanli; Yu Tongwen; Chen Zhongwei; Yu Aiping;

  • 作者单位

    Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada;

    Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Fine Chem Green, Sch Chem & Chem Engn, Minist Educ,Key Lab Green Chem Media & React, Xinxiang 453007, Peoples R China;

    Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada;

    Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Fine Chem Green, Sch Chem & Chem Engn, Minist Educ,Key Lab Green Chem Media & React, Xinxiang 453007, Peoples R China;

    Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada;

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  • 正文语种 eng
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  • 关键词

    bifunctional catalysts; rechargeable Zn-air batteries; sulfur-doped graphene; urchin-like NiCo2S4 microspheres;

    机译：双功能催化剂;可再充电锌空气电池;硫掺杂石墨烯;类胆碱NiCo2S4微球;

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