%0 Journal Article
%T Self-Generated Nanoporous Silver Framework for High-Performance Iron Oxide Pseudocapacitor Anodes
%J -
%D 2018
%R https://doi.org/10.1021/acsami.8b03725
%X The rapid development of electric vehicles is increasing the demand for next-generation fast-charging energy storage devices with a high capacity and long-term stability. Metal oxide/hydroxide pseudocapacitors are the most promising technology because they show a theoretical capacitance that is 10¨C100 times higher than that of conventional supercapacitors and rate capability and long-term stability that are much higher than those of Li-ion batteries. However, the poor electrical conductivity of metal oxides/hydroxides is a serious obstacle for achieving the theoretical pseudocapacitor performance. Here, a nanoporous silver (np-Ag) structure with a tunable pore size and ligament is developed using a new silver halide electroreduction process. The structural characteristics of np-Ag (e.g., large specific surface area, electric conductivity, and porosity) are desirable for metal oxide-based pseudocapacitors. This work demonstrates an ultra-high-capacity, fast-charging, and long-term cycling pseudocapacitor anode via the development of an np-Ag framework and deposition of a thin layer of Fe2O3 on its surface ([email protected]2O3). The [email protected]2O3 anode shows a capacitance of ˇ«608 F g¨C1 at 10 A g¨C1, and ˇ«84.9% of the capacitance is retained after 6000 charge¨Cdischarge cycles. This stable and high-capacity anode, which can be charged within a few tens of seconds, is a promising candidate for next-generation energy storage devices
%U https://pubs.acs.org/doi/10.1021/acsami.8b03725