Direct growth of mesoporous Carbon on aluminum foil for supercapacitors devices
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Direct growth of mesoporous Carbon on aluminum foil for supercapacitors devices Rafael Vicentini1 · Lenon Henrique Costa1 · Willian Nunes1 · Otávio Vilas Boas1 · Davi Marcelo Soares1 · Thayane Almeida Alves1 · Carla Real1 · Caroline Bueno1 · Alfredo Carlos Peterlevitz1 · Hudson Zanin1 Received: 8 January 2018 / Accepted: 17 April 2018 © Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract Nowadays it is mandatory sustainable energy production and storage. In this scenario, supercapacitors play an important role as ultrafast energy storage devices with long lifetime and high efficiency features. The new era of these devices is based on new materials and electrolytes that are environment-friendly during manufacturing and applications. This paper presents a high surface area mesoporous Carbon (MC) material direct growth on aluminum current collector on an environment-friendly process. MC material showed specific capacitance of ~ 8 F g− 1 and impressive chemical stability. Prepared with two MC electrodes, low-cost cellulosic separator and aqueous neutral electrolyte, the supercapacitor coin cells presented very low equivalent series resistance, ~ 100% device storage and supply efficiency, then almost no Capacitance, Energy and Power lost after dozen thousand cycles (on the optimized cell). The Ragone plot contrasts our data with conventional capacitors, electric double-layer capacitor (EDLC) and batteries, fitting them well into the EDLC category. For our best understanding, the excellent electric contact of MC and Al current collector is the key parameter to achieve a minimal ESR, higher efficiency and longer lifetime. The detailed characterization of material and devices are presented herein, evidencing MC as promising materials for energy storage applications.
1 Introduction On the next three decades, renewable sources of energy are expected to expand four times from the current installed capacity, leading expected C O2 emissions to be half of today’s value. In this scenario electricity is moving to 50% of the worldwide energy. For that, it is imperative to build novel solutions for energy storage that are still unavailable today and can cope with the predicted demands. Also, the worldwide increasing of portable and wearable electronic encourages researches on low-cost, flexible, lightweight, and environmentally friendly energy storage and supply. To store and supply effectively energy, advancement of battery and electric double-layer capacitors (EDLCs) is vital to make them economically more viable for applications from communications to transport. The ability of those to store and redistribute effectively and efficiently energy is dependent on the * Hudson Zanin [email protected] 1
Carbon Sci‑Tech Labs, School of Electrical and Computer Engineering, University of Campinas, Av Albert Einstein 400, Campinas, SP 13083‑852, Brazil
engineering of their constructions, chemistry of the electrode surfaces and electrodes/electrolytes interfaces. High surface area for high electrod
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