By a News Reporter-Staff News Editor at Energy Weekly News -- Current study results on Renewable Energy have been published. According to news originating from Harbin, People's Republic of China, by VerticalNews correspondents, research stated, "Composites of LiFePO4 and activated carbon (LFP-AC) were prepared by a ball milling method, Their morphologies were investigated by scanning electronic microscopy and energy dispersive spectroscopy. Hybrid supercapacitors were assembled using the LFP-AC composites as the positive electrode and Li4Ti5O12 as the negative electrode (LFP-AC/Li4Ti5O12)."
Our news journalists obtained a quote from the research from Harbin Engineering University, "Effects of the positive electrode composition (ratio of LiFePO4 to AC) on the performance of LFP-AC/Li4Ti5O12 were investigated via constant current charge-discharge tests. The results demonstrated that the specific capacity and the specific power of the LFP-AC/Li4Ti5O12 hybrid supercapacitor significantly depend upon the content of LiFePO4. in the LFP-AC positive electrode. At 0.5 A g(-1) charge-discharge current, the specific capacity of the LFP-AC/Li4Ti5O12 with 30 wt. % LiFePO4 and 70 wt. % AC in the positive electrode is 42% higher than that of AC/Li4Ti5O12, and the two supercapacitors have the same specific power."
According to the news editors, the researchers concluded: "After 500 charge-discharge cycles at 1.0 A g(-1), the specific capacity of the LFP-AC/Li4Ti5O12 with 80 wt. % LiFePO4 and 20 wt, % AC in the positive electrode is 53% higher than that of AC/Li4Ti5O12, The hybrid device stores electric energy via both the double-layer electrostatic adsorption and the intercalation/deintercalation of lithium ions."
For more information on this research see: (LiFePO4-AC)/Li4Ti5O12 hybrid supercapacitor: The effect of LiFePO4 content on its performance. Journal of Renewable and Sustainable Energy, 2012;4(3):301-307. Journal of Renewable and Sustainable Energy can be contacted at: Amer Inst Physics, Circulation & Fulfillment Div, 2 Huntington Quadrangle, Ste 1 N O 1, Melville, NY 11747-4501, USA. (American Institute of Physics - www.aip.org/; Journal of Renewable and Sustainable Energy - jrse.aip.org/)
The news correspondents report that additional information may be obtained from S.L. Chen, Harbin Engn Univ, Coll Mat Sci & Chem Engn, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, People's Republic of China.