Co9S8 nanoparticles embedded in multiple doped and electrospun hollow carbon nanofibers as bifunctional oxygen electrocatalysts for rechargeable zinc-air battery
Co9S8 nanoparticles embedded in multiple doped and electrospun hollow carbon nanofibers as bifunctional oxygen electrocatalysts for rechargeable zinc-air battery
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DOI：
10.1016/j.apcatb.2019.118437
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发表时间：
2020-07
影响因子：
22.1
通讯作者：
Wei-Ya Peng;Yang Wang;Xiaoxiao Yang;L. Mao;Junhong Jin;Shenglin Yang;K. Fu;Guang Li
中科院分区：
文献类型：
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作者：
Wei-Ya Peng;Yang Wang;Xiaoxiao Yang;L. Mao;Junhong Jin;Shenglin Yang;K. Fu;Guang Li
开发低成本、高效、耐用的氧还原反应（ORR）和析氧反应（OER）电催化剂对可充电锌-空气电池至关重要。本研究采用连续同轴静电纺丝技术，在N/S双掺杂中空多孔碳纳米纤维（Co9S8-NSHPCNF）中嵌入co9s8纳米颗粒，并进行预氧化和碳化处理。由于co9s8纳米颗粒与NSHPCNF的协同作用、更高的比表面积、中空多孔结构、N和S的掺杂以及更好的导电性，Co9S8-NSHPCNF双功能催化剂在ORR （e2 /2= 0.82 V）和OER （Ej = 10 mA cm−2= 1.58 V）上表现出比贵金属基催化剂更好的性能。此外，Co9S8-NSHPCNF用作液态锌-空气电池的阴极催化剂时，表现出优异的耐久性。制备了Co9S8-NSHPCNF全固态锌-空气电池，具有良好的充放电循环性能。
The development of low-cost electrocatalysts with highly efficient catalytic activity and strong durability toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for rechargeable zinc-air battery. In this work, Co9S8nanoparticles embedded in N/S dual-doped hollow and porous carbon nanofibers (Co9S8-NSHPCNF) are prepared via the continuous coaxial electrospinning technology followed by pre-oxidation and carbonization treatment. Attributed to synergistic effects between the Co9S8nanoparticles and NSHPCNF, higher specific surface area, hollow and porous structure, the doping of N and S and better electrical conductivity, the Co9S8-NSHPCNF bifunctional catalysts exhibit preferable performance toward ORR (E1/2= 0.82 V) and OER (Ej = 10 mA cm−2= 1.58 V) compared to precious metal-based catalysts. In addition, when being used as a cathode catalyst in liquid zinc-air battery, Co9S8-NSHPCNF displays excellent durability. An all solid-state zinc-air battery with Co9S8-NSHPCNF is also fabricated and presents superb charge and discharge cycling performance.