Are germanium-based materials a potential anode for lithium ion batteries?
Germanium-based materials with extremely high theoretical energy capacities have gained a lot of attention recently as potential anodes for lithium ion batteries.
What are the advantages of germanium based materials?
In addition to the high theoretical capacity, germanium-based materials have many other obvious advantages. 1) High lithium-ion diffusivity. Ge is 400 times faster in lithium ion diffusion than Si (at room temperature, 1.41 × 10 −14 cm 2 s −1 for Si and 6.51 × 10 −12 cm 2 s −1 for Ge ; at 150 °C, 3.1 × 10 −9 cm 2 s −1 for Ge) .
How can germanium NPS improve battery performance?
When germanium NPs are slurry-casted with polyacrylic acid (PAA) binder and co-solvent fluoroethylene carbonate (FEC) in the electrolyte, the battery performance is significantly improved. Its capacity could be as high as over 1000 mA h g −1 when discharging the electrode at up to 20 C .
Are germanium-based anodes suitable for lithiation?
Germanium-based materials for LIBs have been demonstrated to possess ultrafast charge-discharge rate, high stability and robustness after lithiation. Several reviews focused on germanium-based anodes have been published recently [, , , , , ].
How stable is a lithium ion battery after 2000 cycles?
Attractive cycling stability is demonstrated for the materials. After 2000 cycles, the specific capacity still remains up to 1042 mA h g −1 at 0.5 C . The excellent lithium storage performance depends on the olive-like structures with high level dispersed Ge NPs and porous carbon framework, which enhances lithiation/delithiation processes.
What is a battery energy storage system?
A battery energy storage system (BESS) is an electrochemical device that charges from the grid or a power plant and then discharges that energy to provide electricity or other grid services when needed.
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Germanium-based materials with extremely high theoretical energy capacities have gained a lot of attention recently as potential anodes for lithium ion batteries. These materials …
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Germanium (Ge) is a promising anode material for lithium ion batteries due to its high theoretical capacity. However, its poor cycling stability associated with its large volume …
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