Investigation of Water-Soluble Binders for LiNi Mn O -Based Full Cells.

Two water-soluble binders of carboxymethyl cellulose (CMC) and sodium alginate (SA) have been studied in comparison with N-methylpyrrolidone-soluble poly(vinylidene difluoride-co-hexafluoropropylene) (PVdF-HFP) to understand their effect on the electrochemical performance of a high-voltage lithium nickel manganese oxide (LNMO) cathode. The electrochemical performance has been investigated in full cells using a Li Ti O (LTO) anode. At room temperature, LNMO cathodes prepared with aqueous binders provided a similar electrochemical performance as those prepared with PVdF-HFP.

Electrodeposition of Polymer Electrolyte Into Porous LiNiMnO for High Performance All-Solid-State Microbatteries.

We report the electrodeposition of polymer electrolyte (PMMA-PEG) in porous lithium nickel manganese oxide (LiNiMnO) cathode layer by cyclic voltammetry. The cathode-electrolyte interface of the polymer-coated LNMO electrode has been characterized by scanning electron microscopy and electrochemical techniques. Electrochemical measurements consisting of galvanostatic cycling tests and electrochemical impedance spectroscopy revealed a significant improvement of the capacity values and the increase of the operating voltage.

ALD AlO-Coated TiO Nanotube Layers as Anodes for Lithium-Ion Batteries.

The utilization of the anodic TiO nanotube layers, with uniform AlO coatings of different thicknesses (prepared by atomic layer deposition, ALD), as the new electrode material for lithium-ion batteries (LIBs), is reported herein. Electrodes with very thin AlO coatings (∼1 nm) show a superior electrochemical performance for use in LIBs compared to that of the uncoated TiO nanotube layers. A more than 2 times higher areal capacity is received on these coated TiO nanotube layers (∼75 vs 200 μAh/cm) as well as higher rate capability and coulombic efficiency of the charging and discharging reactions.