Newly devised static negative capacitor could improve computing

Science Daily  April 8, 2019 Previously proposed designs for negative capacitors worked on a temporary, transient basis. An international team of researchers (France, Russia, USA Argonne National Laboratory) created a permanent static negative capacitor which works as a steady-state, reversible device. The prime component of the negative capacitor involves a filling made of a ferroelectric material. By splitting a nanoparticle into two equal ferroelectric domains of opposite polarization, separated by a boundary called a domain wall, they were able to minimize the effect of the total depolarizing electric field. They showed that the ferroelectric nanodot capacitor hosts a stable two-domain […]

3D-Printed Graphene Scaffold Breaks Capacitor Records

Inside Science  October 18, 2018 A team of researchers in the US (UC Santa Cruz, Lawrence Livermore National Laboratory) has made a 3D printed graphene aerogel electrode with MnO2 loading of 182.2 mg cm−2, which achieves a record-high areal capacitance of 44.13 F cm−2. the electrode can simultaneously achieve excellent capacitance normalized to area, gravimetry, and volume, which is the trade-off for most electrodes. The work successfully validates the feasibility of printing practical pseudocapacitive electrodes, which might revolutionize pseudocapacitor fabrication… read more. TECHNICAL ARTICLE