Market Assessment: stretchable and wearable textile-based lithium-ion battery electrodes

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New "smart clothing" systems will incorporate a variety of wearable electronic devices, from sensors to detect biometric data to light-emitting displays to display data to the user. For every application, on-board and wearable power sources are needed to enable the continuous function of these wearable devices. Integrating energy storage materials with textiles faces a main challenge of the mismatch between the mechanical properties of brittle, hard energy storage materials and soft, stretchable textiles. We have demonstrated a unique strategy to solve this problem by using a warp-knitted velour fabric in an architectural strain-engineering design to prepare stretchable textile-based lithium-ion battery (LIB) electrodes. The velour fabric enables the integration of the LIB electrode into a single piece of velour fabric, while protecting the brittle electroactive material from strain and subsequent damage. The textile-based stretchable LIB electrode exhibits excellent electrical and electrochemical performance even after 1000 repetitive stretching cycles, demonstrating the protective functionality of the textile-based architectural strain-engineering design. This proposal aims to assess market opportunities for this new wearable technology, with a focus on personal protective equipment, health and wellness, and fashion e-textiles, with an ultimate goal of identifying potential collaborative partners to develop the technology to reach a higher technology readiness level.