Electrostatic spray deposition based lithium ion capacitor

Richa Agrawal; Chunhui Chen; Chunlei Wang

doi:10.1117/12.2228899

17 May 2016 Electrostatic spray deposition based lithium ion capacitor

Richa Agrawal, Chunhui Chen, Chunlei Wang

Proceedings Volume 9865, Energy Harvesting and Storage: Materials, Devices, and Applications VII; 986508 (2016) https://doi.org/10.1117/12.2228899
Event: SPIE Commercial + Scientific Sensing and Imaging, 2016, Baltimore, MD, United States

Abstract

Conventional Electrochemical double-layer capacitors (EDLCs) are well suited as power devices that can provide large bursts of energy in short time periods. However, their relatively inferior energy densities as compared to their secondary battery counterparts limit their application in devices that require simultaneous supply of both high energy and high power. In the wake of addressing this shortcoming of EDLCs, the concept of hybridization of lithium-ion batteries (LIBs) and EDLCs has attracted significant scientific interest in recent years. Such a device, generally referred to as the "lithium-ion capacitor" typically utilizes a lithium intercalating electrode along with a fast charging capacitor electrode. Herein we have constructed a lithium hybrid electrochemical capacitor comprising a Li₄Ti₅O₁₂-TiO₂ (LTO-TiO₂) anode and a reduced graphene oxide and carbon nanotube (rGO-CNT) composite cathode using electrostatic spray deposition (ESD). The electrodes were characterized using scanning electron microscopy and X-ray diffraction studies. Cyclic voltammetry and galvanostatic charge-discharge measurements were carried out to evaluate the electrochemical performance of the individual electrodes and the full hybrid cells.

Citation Download Citation

Richa Agrawal, Chunhui Chen, and Chunlei Wang "Electrostatic spray deposition based lithium ion capacitor", Proc. SPIE 9865, Energy Harvesting and Storage: Materials, Devices, and Applications VII, 986508 (17 May 2016); https://doi.org/10.1117/12.2228899

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