Self-assembled asymmetric membrane containing micron-size germanium for high capacity lithium ion batteries
- Georgia Southern Univ., Statesboro, GA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
We report the formation of novel asymmetric membrane electrode containing micron-size (~5 μm) germanium powders through a self-assembly phase inversion method for high capacity lithium ion battery anode. 850 mA h g-1 capacity (70%) can be retained at a current density of 600 mA g-1 after 100 cycles with excellent rate performance. Such a high retention rate has rarely been seen for pristine micron-size germanium anodes. Moreover, scanning electron microscope studies reveal that germanium powders are uniformly embedded in a networking porous structure consisting of both nanopores and macropores. It is believed that such a unique porous structure can efficiently accommodate the ~260% volume change during germanium alloying and de-alloying process, resulting in an enhanced cycling performance. Finally, these porous membrane electrodes can be manufactured in large scale using a roll-to-roll processing method.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1265847
- Journal Information:
- RSC Advances, Vol. 5, Issue 113; ISSN 2046-2069
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Etching Asymmetric Germanium Membranes with Hydrogen Peroxide for High‐Capacity Lithium‐Ion Battery Anodes
|
journal | January 2020 |
Toward Low-Cost, High-Energy Density, and High-Power Density Lithium-Ion Batteries
|
journal | June 2017 |
Etching Asymmetric Germanium Membranes with Hydrogen Peroxide for High‐Capacity Lithium‐Ion Battery Anodes
|
journal | January 2020 |
Similar Records
Long cycle life microporous spherical carbon anodes for sodium-ion batteries derived from furfuryl alcohol
Tin asymmetric membranes for high capacity sodium ion battery anodes