Weng Wei, Jiang Boming, Wang Zhen, Xiao Wei
School of Resource and Environmental Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430072, P.R. China.
Sci Adv. 2020 Feb 28;6(9):eaay9278. doi: 10.1126/sciadv.aay9278. eCollection 2020 Feb.
Fixation of CO on the occasion of its generation to produce advanced energy materials has been an ideal solution to relieve global warming. We herein report a delicately designed molten salt electrolyzer using molten NaCl-CaCl-CaO as electrolyte, soluble GeO as Ge feedstock, conducting substrates as cathode, and carbon as anode. A cathode-anode synergy is verified for coelectrolysis of soluble GeO and in situ-generated CO at the carbon anode to cathodic Ge nanoparticles encapsulated in carbon nanotubes (Ge@CNTs), contributing to enhanced oxygen evolution at carbon anode and hence reduced CO emissions. When evaluated as anode materials for lithium-ion batteries, the Ge@CNTs hybrid shows high reversible capacity, long cycle life, and excellent high-rate capability. The process contributes to metallurgy with reduced carbon emissions, in operando CO fixation to advanced energy materials, and upgraded conversion of carbon bulks to CNTs.
在一氧化碳生成时将其固定以生产先进能源材料，一直是缓解全球变暖的理想解决方案。我们在此报告一种精心设计的熔盐电解槽，它使用熔融的NaCl-CaCl-CaO作为电解质，可溶性GeO作为锗原料，导电基底作为阴极，碳作为阳极。通过在碳阳极上对可溶性GeO和原位生成的CO进行共电解，验证了阴极-阳极协同作用，生成了包裹在碳纳米管中的阴极锗纳米颗粒（Ge@CNTs），这有助于增强碳阳极上的析氧反应，从而减少CO排放。当作为锂离子电池的阳极材料进行评估时，Ge@CNTs复合材料表现出高可逆容量、长循环寿命和优异的高倍率性能。该过程有助于实现冶金过程中的碳排放减少、将CO原位固定为先进能源材料以及将碳块升级转化为碳纳米管。
