Stabilizing High-Voltage Cathodes via Ball-Mill Coating with Flame-Made Nanopowder Electrolytes.

LiMnNiO (LMNO) spinel has recently been the subject of intense research as a cathode material because it is cheap, cobalt-free, and has a high discharge voltage (4.7 V). However, the decomposition of conventional liquid electrolytes on the cathode surface at this high oxidation state and the dissolution of Mn have hindered its practical utility.

LiAlO/LiAlO Membranes Derived from Flame-Synthesized Nanopowders as a Potential Electrolyte and Coating Material for All-Solid-State Batteries.

Recently, γ-LiAlO has attracted considerable attention as a coating in Li-ion battery electrodes. However, its potential as a Li ceramic electrolyte is limited due to its poor ionic conductivity (<10 S cm). Here, we demonstrate an effective method of processing LiAlO membranes (<50 μm) using nanopowders (NPs) produced via liquid-feed flame spray pyrolysis (LF-FSP).

Solid Electrolytes for Li-S Batteries: Solid Solutions of Poly(ethylene oxide) with LiPON- and LiSiPON-Based Polymers.

We report here efforts to synthesize free-standing, dry polymer electrolytes that exhibit superior ionic conductivities at ambient for Li-S batteries. Co-dissolution of poly(ethylene oxide) (PEO) ( 900k) with LiPON and LiSiPON polymer systems at a ratio of approximately 3:2 followed by casting provides transparent, solid-solution films 25-50 μm thick, lowering PEO crystallinity, and providing measured impedance values of 0.1-2.

Polymer Precursor Derived LiPON Electrolytes: Toward Li-S Batteries.

Efforts to develop polymer precursor electrolytes that offer properties anticipated to be similar or superior to (lithium phosphorus oxynitride, LiPON) glasses are reported. Such precursors offer the potential to be used to process LiPON-like thin glass/ceramic coatings for use in all solid state batteries, ASBs. Here, LiPON glasses provide a design basis for the synthesis of sets of oligomers/polymers by lithiation of OP(NH)(NH) [from OP(NH)],OP(NH)(NHSiMe) and [P═N](NHSiMe)(NH).