A preparation method of soft carbon comprises heating heavy oil to raw coke under a condition of 480°C-550°C, heating the raw coke to 850°C-900°C at a first heating rate of 3°C/min to 5°C/min and holding the temperature for 4 hours or more to obtain ...

A method for prelithiating a soft carbon negative electrode (11) includes the steps of: disposing a lithium-containing electrolyte between the soft carbon negative electrode (11) and a lithium metal piece (12); prelithiating the soft carbon negative electr...