3/18/2023 0 Comments Book collector nachen![]() ![]() employed current collectors based on superaligned carbon nanotube films, which also showed better wetting, stronger adhesion, and mechanical durability of cast electrode materials. A variety of carbon-based current collectors including carbon nanotubes, (10−12) carbon paper, (13,14) graphene paper, (15−17) and carbon fiber (18,19) were developed to replace traditional metal foils. (8,9) This limitation has triggered efforts toward developing lightweight current collectors. Traditional metal current collectors are considered to be passive components as they hardly contribute to the overall capacity while accounting for ∼15% (for Al metal collector) and ∼50% (for Cu collector) of total weight of the industrial-scale cathodes and anodes, respectively. (6,7) Importantly, the current collector should not only act as an electrical conductor between the electrode and external circuit but also as a compatible support for coating of electrode materials while being lightweight, mechanically strong, and electrochemically stable. Moreover, the metal surface must be treated to ensure strong adhesion of electrode materials for minimizing the contact resistance and increasing capacity, rate capability, and cycling stability over a pristine metal surface covered with a native oxide layer. ![]() However, they do not contribute to capacity, but add up to the total weight and volume, thus reducing the overall energy density of LIB cells significantly. (4,5) Metal current collectors such as copper (Cu) and aluminum (Al) are typically used as materials for anode and cathode, respectively. These batteries are also taking over the electric/hybrid electric vehicles market because of their high energy density and excellent energy efficiency. ![]() (1−3) Li-ion batteries (LIBs) are currently the dominant technology for portable electronics. Lightweight, flexible, portable electronic devices and wearable gadgets drive demand to develop compact and conformal energy-storage units. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |