Science Daily February 1, 2022 Using electromagnetics researchers in Finland have developed a free-positioning wireless power transfer technology that can direct power to individual devices without needing plugs, tracking devices , or complex computing. Devices can be charged while they are moving. Multiple transmitters (Txs) are placed in a pad-like area, and the transmitter coils are optimally excited to enable robust and efficient power transfer to movable receivers within the charging area. The configuration enables almost continuous magnetic flux path from a set of Tx coil(s) to another set of Tx coil(s) through the receiver coil ferrite core ensuring efficient […]
Tag Archives: Battery charging
Ultrafast charging of batteries using fully new anode material
Nanowerk November 15, 2021 Nanosizing of active electrode material is a common strategy to increase the effective lithium-ion diffusion transport rate, but it also decreases the volumetric energy/power density and stability of the battery. An international team of researchers (the Netherlands, China, Germany) has demonstrated nickel niobate (NiNb2O6) as a new intrinsic high-rate anode material for lithium-ion batteries without the requirement of realizing nano-architectures. The NiNb2O6 host crystal structure exhibits only a single type of channel for lithium-ion intercalation and can be fully lithiated with a capacity of about 244 mAh g−1 at low current densities. A high diffusion coefficient […]
Thin layer protects battery, allows cold charging
Science Daily August 26, 2020 Stable operation of rechargeable lithium-based batteries at low temperatures is plagued by dendritic Li plating and unstable solid–electrolyte interphase (SEI). A team of researchers in the US (Pennsylvania State University, Argonne National Laboratory, Ohio University, University of Illinois) used a self-assembled monolayer of electrochemically active molecules on current collectors that regulates the nanostructure and composition of the SEI and deposition morphology of Li metal anodes to achieve high performance. A multilayer SEI that contains a lithium fluoride-rich inner phase and amorphous outer layer effectively seals the Li surface, in contrast to the conventional SEI, which […]