分析了气体分散通道叶片角度、搅拌转速、介质黏度、桨叶组合对气含率的影响.研究结果表明,当气体分散通道叶片角度为 30°时,在转速相同或输入相同的功率时,可以吸入更多的气体.气含率随搅拌转速和介质黏度的增大而增大.适宜的桨...分析了气体分散通道叶片角度、搅拌转速、介质黏度、桨叶组合对气含率的影响.研究结果表明,当气体分散通道叶片角度为 30°时,在转速相同或输入相同的功率时,可以吸入更多的气体.气含率随搅拌转速和介质黏度的增大而增大.适宜的桨叶组合为六直叶圆盘桨+六叶上斜叶桨,该组合具有较高的气体吸入速率和气体分散能力,气含率较高.气含率与单位体积功耗的关系为ε∝(P g /V)2.4,随单位体积功耗增大,气含率明显上升,气液分散效果更好,传质效率较高.展开更多
The formation process of solid electrolyte interphase（SEI） film on spinel LiMn2O4 electrode surface was studied by electrochemical impedance spectroscopy（EIS） during the initial storage in 1 mol/L LiPF6-EC：DMC：D...The formation process of solid electrolyte interphase（SEI） film on spinel LiMn2O4 electrode surface was studied by electrochemical impedance spectroscopy（EIS） during the initial storage in 1 mol/L LiPF6-EC：DMC：DEC electrolyte and in the subsequent first charge-discharge cycle. It has been demonstrated that the SEI film thickness increased with the increase of storage time and spontaneous reactions occurring between spinel LiMn2O4 electrode and electrolyte can be prevented by the SEI film. In the first charge-discharge cycle succeeding the storage, the electrolyte oxidation coupled with Li-ion insertion is evidenced as the main origin to increase the resistance of SEI film. The results also confirm that the variations of the charge transfer resistance（Rot） with the electrode potential（E） can be well described using a classical equation.展开更多
基金supported by the National Natural Science Foundation of China (Grants No.21103013,21473014)the Natural Science Foundation of Shanxi Province (Grant No.2016JM5082)Student′s Platform for Innovation and Entrepreneurship Training Program (Grants No. 201810710113, 201910710469)~~
文摘分析了气体分散通道叶片角度、搅拌转速、介质黏度、桨叶组合对气含率的影响.研究结果表明,当气体分散通道叶片角度为 30°时,在转速相同或输入相同的功率时,可以吸入更多的气体.气含率随搅拌转速和介质黏度的增大而增大.适宜的桨叶组合为六直叶圆盘桨+六叶上斜叶桨,该组合具有较高的气体吸入速率和气体分散能力,气含率较高.气含率与单位体积功耗的关系为ε∝(P g /V)2.4,随单位体积功耗增大,气含率明显上升,气液分散效果更好,传质效率较高.
基金the National Key Basic Research Program of China(No.2002BC211804)
文摘The formation process of solid electrolyte interphase（SEI） film on spinel LiMn2O4 electrode surface was studied by electrochemical impedance spectroscopy（EIS） during the initial storage in 1 mol/L LiPF6-EC：DMC：DEC electrolyte and in the subsequent first charge-discharge cycle. It has been demonstrated that the SEI film thickness increased with the increase of storage time and spontaneous reactions occurring between spinel LiMn2O4 electrode and electrolyte can be prevented by the SEI film. In the first charge-discharge cycle succeeding the storage, the electrolyte oxidation coupled with Li-ion insertion is evidenced as the main origin to increase the resistance of SEI film. The results also confirm that the variations of the charge transfer resistance（Rot） with the electrode potential（E） can be well described using a classical equation.
