作者: Kyungho Kim , Ryan A Adams , Patrick J Kim , Anjela Arora , Enrico Martinez
DOI: 10.1016/J.CARBON.2018.03.013
关键词: Amorphous solid 、 Lithium-ion battery 、 Autoclave 、 Chemical engineering 、 Sublimation (phase transition) 、 Anode 、 Current density 、 Chemical kinetics 、 Materials science 、 Faraday efficiency
摘要: Abstract A facile, one-step, solvent-free ‘dry autoclaving’ synthesis method utilized coffee oil as carbon precursor to obtain micrometer diameter spheroidal particles for lithium ion battery anodes. The morphology resulted from the evaporation of liquid into liquid/gas phase interphase at elevated temperature (700 °C), followed by solid/gas sublimation interactions during cooling (below 350 °C) in a closed autoclave. mechanism formation is proposed considering precursor's composition and chemical autoclaving. solid exhibits 0.85 g cc−1 tap density 5 m2 g−1 surface area. Galvanostatic cycling performed 100 mA g−1 current delivered capacity 290 mAh g−1 after 200 cycles. Battery testing (50 °C) increased (350 mAh cycles 100 mA g−1), but with decreased Coulombic efficiency due faster electrolyte depletion augmented reaction kinetics. spherical structuring are maintained 250 charge-discharge cycles, indicating long term stability Li-ion anode material.