Eriksson, T. 2001. LiMn2O4 as a Li-Ion Battery Cathode. From Bulk to Electrolyte Interface. Acta Universitatis Upsaliensis. Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 651. 53 pp. Uppsala. ISBN 91-554-5100-4. LiMn2O4 is ideal as a high-capacity Li-ion battery cathode material by virtue of its low toxicity, low cost, and the high natural abundance ...

After a first suggestion of the use of lithium transition-metal oxides in the cathode of lithium-ion battery (LIB) [1], many researchers have investigated to improve its performance such as higher-energy density, longer-life, and lower-cost. For the systematic, effective development, various transition-metals for the cathode active material have been investigated and chemical state characteriza...

The rapid insertion and extraction of Li ions from a cathode material is imperative for the functioning of a Li-ion battery. In many cathode materials such as LiCoO2, lithiation proceeds through solid-solution formation, whereas in other materials such as LiFePO4 lithiation/delithiation is accompanied by a phase transition between Li-rich and Li-poor phases. We demonstrate using scanning transm...

Recently, intensive efforts are dedicated to convert and store the solar energy in a single device. Herein, dye-synthesized solar cell technology is combined with lithium-ion materials to investigate light-assisted battery charging. In particular we report the direct photo-oxidation of lithium iron phosphate nanocrystals in the presence of a dye as a hybrid photo-cathode in a two-electrode syst...

Behavior of the xenon dispenser hollow cathode is known to be complex, exhibiting high through-anode ion emission, unusual particle energy distributions, and high plume erosion rates. A flight-type T6 hollow cathode was characterized using several diagnostic methods. Measurements involved a retarding potential analyzer, quadrupole mass spectrometer, and Langmuir probe. Far-field energy, flux, p...

Rechargeable magnesium batteries are poised to be viable candidates for large-scale energy storage devices in smart grid communities and electric vehicles. However, the energy density of previously proposed rechargeable magnesium batteries is low, limited mainly by the cathode materials. Here, we present new design approaches for the cathode in order to realize a high-energy-density rechargeabl...

Recent advances in cold cathode field emitters have produced improvements in emission efficiency and thus enhanced the applicability of such devices. This article considers heating due to electron field emission from a polycrystalline diamond cathode. Temperature measurements from infrared thermography reveal highly localized heating due to nonuniform emission from the cathode. Power dissipatio...