E.S. Takeuchi, K.J. Takeuchi, A.C. Marschilok
Stony Brook University,
Keywords: energy storage, scalable, architecture
Summary:Commonly used materials and electrode constructs often suffer ion or electron transport limitations that inhibit design of scalable electrodes and systems. Yet, scalable systems are critical for many emerging applications including those related to renewable energy generation. With appropriate architectural design, we demonstrate that ion access from the electrolyte is no longer a limitation for thick electrodes. However, maintaining effective transport among the active materials within the electrode then emerges as a key consideration. Appropriate selection and structure of the conductive matrix allowed preparation of thick electrodes with both adequate conductivity and ion access. The electrochemical function of these purposefully designed electrodes was characterized using operando techniques where the utilization of the electrochemically active materials was visualized as the systems were under discharge or charge. These results facilitate the future design of scalable electrochemical energy storage systems.