TY - JOUR ID - 15079 TI - A high energy 3V lithium-ion capacitor synthesized via electrostatic spray deposition JO - Advanced Materials Letters JA - AML LA - en SN - 0976-3961 AU - Agrawal, Richa AU - Chen, Chunhui AU - Dages, Samantha AU - Wang, Chunlei AD - Y1 - 2017 PY - 2017 VL - 8 IS - 7 SP - 783 EP - 790 KW - Anatase TiO2 KW - Graphene KW - Carbon nanotubes KW - lithium KW - ion capacitors KW - electrostatic spray deposition DO - 10.5185/amlett.2017.7098 N2 - Reduced graphene oxide-carbon nanotube (rGO-CNT) and anatase TiO2-Li4Ti5O12 (ATO-LTO) composite electrodes were synthesized via electrostatic spray deposition (ESD) and analyzed as cathode and anode vs. lithium, respectively.  The rGO-CNT and ATO-LTO electrodes were able to deliver discharge capacities of ca. 63 mAhg -1 and 95 mAhg -1 , respectively for a current rate of 0.1 Ag -1 with superior rate capability and cycle stability. Post electrode analyses, lithium-ion hybrid electrochemical capacitors (Li-HEC) were constructed comprising a prelithiated ATO-LTO anode and an activated rGO-CNT cathode in a carbonate based 1M LiPF6 salt electrolyte. The Li-HEC cells were stable for a cell potential of  0.05-3V and were able to deliver a maximum gravimetric energy density of 33.35 Whkg -1 and a maximum power density of 1207.4 Wkg -1 , where the cell parameters were normalized with the total mass of the anode and cathode active materials. Furthermore the Li-HEC cells were able to retain ~77% of the initial capacity after 100 cycles. The superior Li-HEC performance is attributed to the utilization of a prelithiated lithium-intercalating anode and a double layer cathode in an asymmetric configuration. The feasibility of using a low-cost, facile process like ESD was therefore shown to produce high performance Li-HECs. UR - https://aml.iaamonline.org/article_15079.html L1 - https://aml.iaamonline.org/article_15079_90ac4b1c7a443c4a9bd00e7666c37405.pdf ER -