Waste Toner-Derived Carbon/Fe3o4 Nano Composite For High Performance Supercapacitor. Homepage › Forums › Toner News Main Forums › Waste Toner-Derived Carbon/Fe3o4 Nano Composite For High Performance Supercapacitor. Tonernews.com, December 10, 2019. USA This topic is empty. Viewing 1 post (of 1 total) Author Posts #107561 tonerKeymaster Author December 10, 2019 at 11:43 AM Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In Its Free! Click Here to Share your Success Stories with Tonernews.com and We'll Publish it for You!