Fabrication of Organometallic Halide Perovskite Electrochemical Supercapacitors utilizing Quasi-Solid-

State Electrolytes for Energy Storage Devices

Idris Popoolaa,b, Mohammed Gondala,b*, Luqman Oloorea,b, AbdulJelili Popoolaa,b and Jwaher AlGhamdic

aLaser Research Group, Physics Department, King Fahd University of Petroleum and Minerals, P.O. Box 5047, Dhahran 31261, Saudi Arabia.bKing Abdullah Center for Atomic and Renewable Energy (KACARE)cDepartment of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, Dammam 31113, Saudi Arabia

*Corresponding author. E-mail address: magondal@kfupm.edu.sa (M.A. Gondal), Telephone: +96613-8602351/8603274;

Supplementary Information

Figure S1: a) LSV curve of the CHLPVAKOH quasi-solid-state electrolyte in the potential window between 0 V and 3 V at a sweep rate of 0.1 V s-1. b) LSV curve of the CHLPVAKOHMAI quasi-solid-state electrolyte in the potential window between 0 V and 3 V at a sweep rate of 0.1 V s-1.

Figure S2: a) Areal capacitance as a function of scan rate obtained from CV measurement for device PES01 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte without separator. b) Areal capacitance as a function of scan rate obtained from CV measurement for device PES02 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte without separator. c) Areal capacitance as a function of scan rate obtained from CV measurement for device PES03 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte with separator. d) Areal capacitance as a function of scan rate obtained from CV measurement for device PES04 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte with separator.

Figure S3: a) Impedance phase angle versus frequency for device PES01 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte without separator. b) Impedance phase angle versus frequency for device PES02 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte without separator. c) Impedance phase angle versus frequency for device PES03 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte with separator. d) Impedance phase angle versus frequency for device PES04 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte with separator.

Figure S4: a) Areal capacitance as a function of scan rate obtained from CV measurement for device PES05 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte without separator. b) Areal capacitance as a function of scan rate obtained from CV measurement for device PES06 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte without separator. c) Areal capacitance as a function of scan rate obtained from CV measurement for device PES07 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte with separator. d) Areal capacitance as a function of scan rate obtained from CV measurement for device PES08 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte with separator.

Figure S5: a) Impedance phase angle versus frequency for device PES05 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte without separator. b) Impedance phase angle versus frequency for device PES06 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte without separator. c) Impedance phase angle versus frequency for device PES07 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte with separator. d) Impedance phase angle versus frequency for device PES08 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte with separator.

Figure S6: a) Evolution of real (C`, brown plot) and imaginary (C”, olive plot) capacitances with frequency for device PES05 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte without separator. b) Evolution of real (C`, brown plot) and imaginary (C”, olive plot) capacitances with frequency for device PES06 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte without separator. c) Evolution of real (C`, brown plot) and imaginary (C”, olive plot) capacitances with frequency for device PES07 one-step fabricated perovskite active electrode utilizing CHLPVAKOH electrolyte with separator. d) Evolution of real (C`, brown plot) and imaginary (C”, olive plot) capacitances with frequency for device PES08 one-step fabricated perovskite active electrode utilizing CHLPVAKOHMAI electrolyte with separator.