Presentation Title

An Optimized Microfluidic Paper-Based NiOOH/Zn Alkaline Battery

Faculty Mentor

Frank Gomez

Start Date

18-11-2017 10:45 AM

End Date

18-11-2017 11:00 AM

Location

9-263

Session

Physical Sciences 3

Type of Presentation

Oral Talk

Subject Area

physical_mathematical_sciences

Abstract

The search for efficient, reliable, clean, and inexpensive power sources has never been as great as today and will continue to grow especially due to the increasing market for portable electronic devices. Nickel-zinc (Ni/Zn) batteries have long been recognized as a viable option for portable power applications due to their attractive electrochemical properties, abundant low-cost materials, and environmentally friendly chemistry. Despite this fact, the widespread use and commercializationof Ni/Zn batteries using liquid electrolytes has yet come to fruition due to difficulties associated with the passivation of the electrodes. In an attempt to overcome these issues and to increase the performance of the batteries, methods have been employed to modify the Ni and Zn electrode surfaces. One such method is employed in this work. An alkaline Nickel-Oxide/Zinc (NiOOH/Zn) battery featuring a cellulose matrix separator between electrodes is presented. The metallic electrodes and paper separator are inserted in a layer-by-layer (LbL) assembly providing mechanical stability to the system resulting in a lightweight and easy-to-use device. The battery functions using a solution (150 μL) of 1.5 M potassium hydroxide (KOH) and was optimized for the amount of NiOOH-ink used at the cathode (11.11 mg/cm2) and thickness of the paper membrane separating the electrodes (260 μm). The battery was able to produce a maximum voltage, current density, and power density of 1.38 V, 11.02 mA/cm², and 0.57 mW/cm², respectively. The battery displayed a maximum current and power of 24.8 mA and 1.27 mW, respectively. Moreover, four batteries connected in series and in a stacked configuration were able to power a small flameless candle for 22 minutes. This work has potential in fulfilling the demands for short-term and lightweight power supplies.

Summary of research results to be presented

The research resulted in a compact 9 cm2 Nickel-Oxide/Zinc battery with electrode areas of both 2.25 cm2. The optimal battery consisted of a zinc electrode, nickel cathode modified with 25 mg of NiOOH ink and a 260 μm thick paper membrane all encompassed in a layer-by-layer design. The battery was able to produce a maximum voltage, current density, and power density of 1.38 V, 11.02 mA/cm², and 0.57 mW/cm², respectively. The battery displayed a maximum current and power of 24.8 mA and 1.27 mW, respectively. Moreover, four batteries connected in series and in a stacked configuration were able to power a small flameless candle for 22 minutes.

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Nov 18th, 10:45 AM Nov 18th, 11:00 AM

An Optimized Microfluidic Paper-Based NiOOH/Zn Alkaline Battery

9-263

The search for efficient, reliable, clean, and inexpensive power sources has never been as great as today and will continue to grow especially due to the increasing market for portable electronic devices. Nickel-zinc (Ni/Zn) batteries have long been recognized as a viable option for portable power applications due to their attractive electrochemical properties, abundant low-cost materials, and environmentally friendly chemistry. Despite this fact, the widespread use and commercializationof Ni/Zn batteries using liquid electrolytes has yet come to fruition due to difficulties associated with the passivation of the electrodes. In an attempt to overcome these issues and to increase the performance of the batteries, methods have been employed to modify the Ni and Zn electrode surfaces. One such method is employed in this work. An alkaline Nickel-Oxide/Zinc (NiOOH/Zn) battery featuring a cellulose matrix separator between electrodes is presented. The metallic electrodes and paper separator are inserted in a layer-by-layer (LbL) assembly providing mechanical stability to the system resulting in a lightweight and easy-to-use device. The battery functions using a solution (150 μL) of 1.5 M potassium hydroxide (KOH) and was optimized for the amount of NiOOH-ink used at the cathode (11.11 mg/cm2) and thickness of the paper membrane separating the electrodes (260 μm). The battery was able to produce a maximum voltage, current density, and power density of 1.38 V, 11.02 mA/cm², and 0.57 mW/cm², respectively. The battery displayed a maximum current and power of 24.8 mA and 1.27 mW, respectively. Moreover, four batteries connected in series and in a stacked configuration were able to power a small flameless candle for 22 minutes. This work has potential in fulfilling the demands for short-term and lightweight power supplies.