A hybrid electrolyte energy storage device with high energy and long life using lithium anode and MnO2 nanoflake cathode

• Published in: Electrochemistry communications Vol. 31; pp. 35 - 38
• Main Authors: Chou, Shu-Lei, Wang, Yun-Xiao, Xu, Jiantie, Wang, Jia-Zhao, Liu, Hua-Kun, Dou, Shi-Xue
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.06.2013; Amsterdam Elsevier; New York, NY
• Subjects: Applied sciences; Capacitors. Resistors. Filters; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Hybrid electrolyte; Ionic liquid; LiSICON; Lithium battery; MnO2; Supercapacitor; Various equipment and components; Lithium battery; MnO2; Supercapacitor; Hybrid electrolyte; LiSICON; Ionic liquid; Cycling; Anode; Cathode; Lithium; Secondary cell; Nanostructure; Electrolytic capacitor; Electrode material; Superionic conductor; Discharge charge cycle; MnO; Manganese Oxides; Specific capacity; Electrical characteristic
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2013.03.003

A hybrid electrolyte energy storage system combining the features of supercapacitors and lithium batteries has been constructed. It consists of MnO2 nanoflakes in 1M Li2SO4 aqueous electrolyte as the cathode and lithium foil in ionic liquid (1M lithium bis(trifluoromethanesulfonyl)imide (LiNTf2) in N-methyl-N-propyl pyrrolidinium bis(trifluoromethanesulfonyl)imide ([C3mpyr][NTf2])) electrolyte as the anode, separated by a lithium super ionic conductor glass ceramic film (LiSICON). This system shows the advantages of both a supercapacitor (long cycle life) and a lithium battery (high energy), as well as low cost and improved safety due to the combination of ionic liquid and ceramic solid state electrolyte in lithium side, which can reduce the formation and prevent the penetration of lithium dendrites. The specific energy for the cathode materials in the hybrid electrolyte system is 170Whkg−1 with more than 85% retention up to 2400cycles. This system is a great candidate for stationary batteries storing solar and wind energy. •Hybrid electrolyte device based on MnO2 nanoflakes supercapacitors and lithium batteries•The specific energy for the cathode materials is 170Whkg−1.•More than 85% retention up to 2400cycles•A great candidate for stationary batteries