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Fabrication of carbon cloth supporting MnOx and its application in Li-O-2 batteries

机译:支撑MNOX的碳布制造及其在Li-O-2电池中的应用

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High-efficiency and low-cost electrocatalysts are generally believed to be the critical factor and have been highly researched to catalyze the oxygen reduction reaction (ORR) during the operation of Li-O-2 battery (LOB). The catalysts with better ORR performance are essential for high-performance LOBs. Herein, a binder-free MnOx@carbon cloth cathode composed of Mn3O4 nanoparticles and Mn2O3 nanosheets were directly synthesized on the carbon cloth by electrodeposition and subsequently heat treatment at different temperature (from 200 degrees C to 400 degrees C). With the increase of temperature, the Mn3O4 nanospheres gradually transformed into Mn2O3 nanosheets. The MnOx obtained at 350 degrees C exhibited the best ORR performance. And MnOx-350 degrees C could operate more than 80 cycles at 340 mA g(-1) with a limiting specific capacity of 1000 mAh g(-1), and its first discharge specific capacity could nearly achieve 8000 mAh g(-1) at 200 mA g(-1).
机译:通常认为高效率和低成本电催化剂是临界因素,并且已经高度研究以催化在Li-O-2电池(LOB)的操作过程中氧还原反应(ORR)。 具有更好ORR性能的催化剂对于高性能LOB至关重要。 在此,通过电沉积在碳布上直接在碳布中直接合成一种无粘合的MNOX碳布阴极,然后在不同温度(从200℃至400℃下加热处理)。 随着温度的增加,Mn3O4纳米球逐渐转化为Mn2O3纳米晶片。 在350℃下获得的MNOX表现出最佳的ORR性能。 MNOX-350 C可以在340 mA G(-1)下运行超过80个循环,限制特定容量为1000mAh(-1),其第一个放电特定容量几乎达到8000mAhg(-1) 在200 ma g(-1)。

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