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Electricity storage is a growing challenge among a broad range of renewable energy sources.The development of high-energy storage devices has been one of the research areas of top most importance in recent years and rechargeable batteries and/or electrochemical capacitors (supercapacitors) are anticipated to be the primary sources of power for modem-day requirements in portable electronic devices, satellites, and electric vehicles.In the meantime, flexible/stretchable electronics have attracted considerable attention very recent years and have opened the door to many important applications that current, rigid electronics cannot achieve.In order to accommodate these needs, electricity storage devices must be flexible and stretchable in addition to their high energy and power density, light weight, miniaturization in size, and safety requirements.Utilizing nanomaterials and nanostructures such as carbon nanotubes (CNTs) for various electricity storage applications such as electrodes in lithium ion batteries and supercapacitors are under close scrutiny because of the promising electrochemical performance of such nanomaterials.Recently, there has been growing interest in CNT macrostructures, particularly film-like structures because of their unique and usually enhanced properties and tremendous potential for applications in energy conversion and storage.In this presentation, I will report our research efforts on synthesizing 2D CNT macro films using chemical vapor deposition method.The CNT films are flexible,machinable and free-standing that could satisfy the needs to develop flexible and even stretchable electricity storage devices.