Whether a traditional disposable battery (e.g., AA) or a rechargeable lithium-ion battery (used in cell phones, laptops and cars), a battery stores chemical energy and releases electrical energy. In this Science 101: How Does a Battery Work? video, scientist Lei Cheng explains how the electrochemistry inside of batteries powers our daily lives. Cheng mentions her research interests which are focused on batteries for electric vehicles and for the electric grid. For the latter, the goal is to use

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