Synthesis of Li₂Mn₃O₇and Application to Hybrid Capacitor

Abstract

:In order to apply hybrid capacitor, Li 2 Mn 3 O 7 was synthesized by combustion method using LiNO 3 , Li(CH 3 COO)·2H 2 O and Mn(CH 3 COO) 2 ·4H 2 O. Spinel pattern was identified the samples calcined over 400 o C in XRD. Intensity of Mn 2 O 3 peak increased as the calcination temperature increased. To decide n/p ratio and to investigate electrochemical properties, charge-discharge tests of Li/ Li 2 Mn 3 O 7 and Li/AC half-cell were carried out. Applying to AC/Li 2 Mn 3 O 7 hybrid capacitor, it had high discharge capacitance of 32.8 F/cc at 100 mA/g.

Synthesis and Electrochemical Characteristics of Spherical Li4Ti5O12/CNT Composite Materials for Hybrid Capacitors

“…The resulting hybrid systems, or hybrid capacitors (HCs), are determined from the different electrochemical mechanisms arising in the cathode and anode as well as by the active materials composing each electrode. For example, the electrodes of HCs are assembled using LIB cathodes such as lithium manganese oxide (LMO) [6][7][8] with EC anodes such as activated carbon (AC); conversely, HCs could be assembled using LIB anodes such as lithium titanium oxide (LTO) [9,10] or graphite [11,12] with EC cathodes such as AC. As a result, the hybrid system can enhance the energy density with twice the capacitance of electric double-layer capacitors (EDLCs) [13].…”