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Germanium Oxide Nanoparticlesfor Superior Battery Electrodes

Brookhaven National Laboratory

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Technology Marketing Summary

Compared to the graphite found in some batteries, similar elements such as tin, silicon, and germanium have much higher theoretical capacities for lithium ions, making them strong candidates for electrode materials. These new amorphous germanium oxide nanoparticles demonstrate a very high capacity for lithium that also resists degradation over many charge-discharge cycles.

Description

The germanium oxide forms nanoscale hierarchical porous agglomerates that have high capacity, high diffusivity of lithium, and enhanced cycling stability. The 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. The germanium oxide is made by employing a modified in-situ one-pot wet-chemistry method that includes preparing germinate ions by reacting a germanium precursor with a hydroxide ion precursor. The generate ion is subsequently reduced, and the resulting germanium oxide can be collected.

Benefits

These porous amorphous germanium oxide electrode materials have a lithium capacity and are resistant to capacity fading, making for better, longer lasting lithium ion batteries. The one-pot synthesis method is both inexpensive and easily scalable.

Applications and Industries

The primary use of these electrode materials is in lithium-ion battery anodes for a wide range of devices, but they may also be used in hybrid electrochemical cells (HECs).

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Application 20150171426
Application
20150171426
POROUS AMORPHOUS GeOx AND ITS APPLICATION AS AN ANODE MATERIAL IN LI-ION BATTERIES
Amorphus germanium oxide materials are provided that are composed of germanium and oxygen having a formula GeO.sub.x, where 0.01.ltoreq.x.ltoreq.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.
Brookhaven National Laboratory 11/30/2012
Filed
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
BSA 12-01PrototypeAvailable03/30/201503/30/2015

Contact BNL About This Technology

To: Avijit Sen<asen@bnl.gov>