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Hollow Mesoporous Carbon Nanospheres Decorated with Metal Oxide Nanoparticles as Efficient Earth‐Abundant Zinc‐Air Battery Catalysts
ChemElectroChem ( IF 3.5 ) Pub Date : 2021-01-07 , DOI: 10.1002/celc.202001526 Yingjie He 1 , Drew Aasen 2 , Alexandra McDougall 2 , Haoyang Yu 1 , Matthew Labbe 2 , Chuyi Ni 1 , Sarah Milliken 1 , Douglas G. Ivey 2 , Jonathan G. C. Veinot 1
ChemElectroChem ( IF 3.5 ) Pub Date : 2021-01-07 , DOI: 10.1002/celc.202001526 Yingjie He 1 , Drew Aasen 2 , Alexandra McDougall 2 , Haoyang Yu 1 , Matthew Labbe 2 , Chuyi Ni 1 , Sarah Milliken 1 , Douglas G. Ivey 2 , Jonathan G. C. Veinot 1
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Hybrids comprising hollow mesoporous nitrogen‐doped carbon (HMC) nanospheres and metal‐oxide nanoparticles were prepared through a hydrothermal synthesis. These materials exhibit excellent bifunctional catalytic activity in the oxygen reduction and evolution reactions (ORR and OER, respectively) that are core to the efficient operation of Zn‐air batteries. When incorporated into prototype devices, Co3O4 and MnCo2O4 nanoparticle‐decorated HMC exhibited discharge potentials of 1.26 and 1.28 V at 10 mA cm−2, respectively. ‘CoFeNiO’‐decorated HMC exhibited a charging potential of 1.96 V at 10 mA cm−2. These metrics are far superior to benchmark Pt−Ru, which displayed discharge and charging potentials of 1.25 and 2.01 V, respectively, at the same current density. The battery equipped with Co3O4‐decorated HMC demonstrated 63 % initial efficiency before cycling. After cycling at 10 mA cm−2 for 100 hours, the battery efficiency was maintained at 56.5 %, outperforming the battery with Pt−Ru (50.2 % after 50 h).
中文翻译：
空心介孔碳纳米球装饰有金属氧化物纳米粒子，可作为高效的富含地球的锌空气电池催化剂
通过水热合成制备了包含空心介孔氮掺杂碳（HMC）纳米球和金属氧化物纳米颗粒的杂化物。这些材料在氧还原和放出反应（分别为ORR和OER）中表现出出色的双功能催化活性，这是锌空气电池高效运行的核心。当将其掺入原型设备中时，用Co 3 O 4和MnCo 2 O 4修饰的纳米颗粒在10 mA cm -2时分别表现出1.26 V和1.28 V的放电电位。装饰有“ CoFeNiO”的HMC在10 mA cm -2时表现出1.96 V的充电电位。这些指标远远优于基准Pt-Ru，后者在相同的电流密度下分别显示出1.25和2.01 V的放电和充电电位。装有Co 3 O 4装饰的HMC的电池在循环前显示63％的初始效率。在10 mA cm -2下循环100小时后，电池效率保持在56.5％，优于Pt-Ru电池（50 h后为50.2％）。
更新日期：2021-01-07
中文翻译：
空心介孔碳纳米球装饰有金属氧化物纳米粒子，可作为高效的富含地球的锌空气电池催化剂
通过水热合成制备了包含空心介孔氮掺杂碳（HMC）纳米球和金属氧化物纳米颗粒的杂化物。这些材料在氧还原和放出反应（分别为ORR和OER）中表现出出色的双功能催化活性，这是锌空气电池高效运行的核心。当将其掺入原型设备中时，用Co 3 O 4和MnCo 2 O 4修饰的纳米颗粒在10 mA cm -2时分别表现出1.26 V和1.28 V的放电电位。装饰有“ CoFeNiO”的HMC在10 mA cm -2时表现出1.96 V的充电电位。这些指标远远优于基准Pt-Ru，后者在相同的电流密度下分别显示出1.25和2.01 V的放电和充电电位。装有Co 3 O 4装饰的HMC的电池在循环前显示63％的初始效率。在10 mA cm -2下循环100小时后，电池效率保持在56.5％，优于Pt-Ru电池（50 h后为50.2％）。
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