Solid-State Batteries: The New Frontier for Robotics Powering Advanced Autonomous Systems

eScience Energy Switzerland

Overview

The rapid evolution of robotics is exposing limitations of conventional lithium-ion batteries, with solid-state batteries (SSBs) emerging as a promising solution. SSBs offer key attributes like non-flammability, wide temperature tolerance, bipolar stacking capability, and geometric versatility, aligning with the unique power demands of modern robotic systems. A recent review examines oxide, sulfide, and polymer-based solid electrolytes for robotics, highlighting that battery demand from this sector has been largely underestimated.

In Depth

Evolving Energy Storage Requirements in Robotics

The swift advancement of robotics, spanning from industrial manipulators to autonomous mobile robots and humanoids, continuously expands their functionalities and application domains. However, this rapid progress increasingly underscores the inherent limitations of conventional liquid-electrolyte lithium-ion batteries, particularly concerning safety, energy density, and adaptability to specific operating environments. To bridge this gap, all-solid-state batteries (SSBs) are attracting significant attention as the next-generation power solution for the field of robotics.

Solid-State Battery Characteristics and Suitability for Robotics

Solid-state batteries possess several crucial characteristics that align well with the stringent demands of robotic systems. Firstly, by utilizing non-flammable solid electrolytes, the risk of fire in the event of an operational accident is drastically reduced, leading to a significant enhancement in safety. Secondly, SSBs can operate stably across a wide temperature range, thereby increasing the reliability of robots in diverse environmental conditions. Furthermore, their potential for high voltage and energy density through bipolar stacking, combined with “geometric versatility” (the ability to be designed in various shapes), offers a major advantage for integrating batteries into complex robotic body structures. The review paper thoroughly discusses how oxide, sulfide, and polymer-based solid electrolytes can be optimized for robotic applications based on their respective properties.

Underestimated Battery Demand in Robotics and Future Prospects

The review emphasizes that the battery demand from the robotics sector has been largely underestimated to date. However, for future robots to operate autonomously and for extended durations, safer and higher-density energy sources are indispensable. SSBs offer the potential for smaller and lighter designs compared to traditional batteries, thereby enhancing a robot’s payload capacity and operational uptime. This for, SSB technology is expected not only to improve robot performance but also to enable the creation of new robotic applications and the realization of robotic systems that surpass current limitations. The synergy between robotics and battery technology is poised to play a critical role in the development of future smart societies.