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<p>Small-scale quadrotors, typically defined as centimeter-scale in size and tens of grams in weight, are increasingly being utilized in applications such as agricultural monitoring or search and rescue operations. These vehicles are typically powered with lithium-ion batteries. However, vehicle operational efficiency and capability are often compromised by the limited energy density of these batteries, resulting in short operational duration. This work explores a high-energy chemistry, aluminum-air (Al-air), as a power source to significantly extend the operational duration of small-scale quadrotors. Rapid corrosion of the aluminum anode in existing Al-air systems has been a barrier to adoption in applications where long-term operation is required. However, corrosion is less of a concern in the small-scale quadrotor application, where the battery is typically under continuous use over a short period of time. The electrochemical and packaging design of a micro-Al-air pouch cell battery is optimized for two operating points: an energy density of 325 <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:\frac{Wh}{k{g}_{battery}}\)</EquationSource> </InlineEquation> above a power density of 500 <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:\frac{W}{k{g}_{battery}}\)</EquationSource> </InlineEquation>, and an energy density of <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\:240\)</EquationSource> </InlineEquation> <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\:\frac{Wh}{k{g}_{battery}}\)</EquationSource> </InlineEquation> above a power density of 800 <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(\:\frac{W}{k{g}_{battery}}\)</EquationSource> </InlineEquation>, both of which far surpass the performance of equivalent commercial lithium-ion batteries. A 3D-printed small-scale quadrotor platform is used to evaluate flight duration. The micro Al-air battery delivers 13.1&#xa0;min of flight time, compared to the 4.5&#xa0;min of flight time provided by the commercial micro lithium-ion battery. This work demonstrates the feasibility of Al-air batteries that simultaneously possess sufficiently high power density to achieve small-scale quadrotor flight, and sufficiently high energy density to achieve extended duration of that flight.</p>

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Micro aluminum-air batteries for extended operational duration of small-scale quadrotors

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月23日

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  • Yanghang Huang,
  • Chenhao Wang,
  • Haoxuan Lyu,
  • Mark G. Allen,
  • Sue Ann Bidstrup Allen

摘要

Small-scale quadrotors, typically defined as centimeter-scale in size and tens of grams in weight, are increasingly being utilized in applications such as agricultural monitoring or search and rescue operations. These vehicles are typically powered with lithium-ion batteries. However, vehicle operational efficiency and capability are often compromised by the limited energy density of these batteries, resulting in short operational duration. This work explores a high-energy chemistry, aluminum-air (Al-air), as a power source to significantly extend the operational duration of small-scale quadrotors. Rapid corrosion of the aluminum anode in existing Al-air systems has been a barrier to adoption in applications where long-term operation is required. However, corrosion is less of a concern in the small-scale quadrotor application, where the battery is typically under continuous use over a short period of time. The electrochemical and packaging design of a micro-Al-air pouch cell battery is optimized for two operating points: an energy density of 325 \(\:\frac{Wh}{k{g}_{battery}}\) above a power density of 500 \(\:\frac{W}{k{g}_{battery}}\) , and an energy density of \(\:240\) \(\:\frac{Wh}{k{g}_{battery}}\) above a power density of 800 \(\:\frac{W}{k{g}_{battery}}\) , both of which far surpass the performance of equivalent commercial lithium-ion batteries. A 3D-printed small-scale quadrotor platform is used to evaluate flight duration. The micro Al-air battery delivers 13.1 min of flight time, compared to the 4.5 min of flight time provided by the commercial micro lithium-ion battery. This work demonstrates the feasibility of Al-air batteries that simultaneously possess sufficiently high power density to achieve small-scale quadrotor flight, and sufficiently high energy density to achieve extended duration of that flight.