POROUS AMORPHOUS GeOx AND ITS APPLICATION AS AN ANODE MATERIAL IN LI-ION BATTERIES
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United States of America Patent
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Issued Date -
Jun 18, 2015
app pub date -
Nov 30, 2012
filing date -
Dec 2, 2011
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Abstract
Amorphus germanium oxide materials are provided that are composed of germanium and oxygen having a formula GeOx, where 0.01≦x≦1.99. The germanium oxide forms nanoscale hierarchical porous agglomerates that have high capacity, high diffusivity of lithium, and enhanced cycling stability. The enhanced or superior performance (structural stability and reactivity) of these materials is due to the formation of ultrafine primary nanoparticles, amorphization, pore formation, preferably of nanoscale nature, and the incorporation of oxygen. These amorphous germanium oxide materials may serve as high-capacity anode materials and afford an enhanced capacity applicable for electrochemical cells such as Li-ion batteries.
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