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Na batteries electrode material based on inorganic nanoparticles

Technology Number: 

1715

Principal Investigator

Prof.
Reshef
Tenne

Department: 

Materials and Interfaces
Summary 

Preparation of Re-doped inorganic MoS2 nanoparticles with good sodium ion reversible intercalation properties, to be used as cathode material for next generation sodium ion batteries.
Lithium ion batteries (LIB) are currently the leading energy storage solution used in many applications. But lithium is both toxic and limited in quantity (hence expensive) and cannot supply the growing demand for energy storage units as well as the need for cleaner and safer technologies.
Sodium ion batteries (SIB) are attractive new generation batteries as they incorporate the much less toxic and much more abundant sodium ion.
Our novel nanoparticles were shown to have competitive electrochemical performances with specific capacity of about 130 mAh/g at 2C and 74 mAh/g at high discharge rate of 20C.

Applications


  • Electrode material for sodium ion batteries
  • Possible applications in magnesium ion batteries

Advantages


  • Competitive specific capacity
  • Improved electrical conductivity towards Na ions

Technology's Essence


The cathode material's reversible intercalation capacity plays a significant role in determining the total capacity of an energy cell. Intercalation requires entering of ions into the electrode material through diffusion channels.
The faceted structure of inorganic nanoparticles (IF) induces intrinsic dislocations and stacking faults which serve as ion diffusion channels. Doping of the nanoparticles increases both conductivity, due to n-type doping of the Mo metal, and the number of structural defects (hence diffusion channels), resulting in total increased electrical conductivity.
The synthetic procedure for producing Re-doped MoS2 nanoparticles is straightforward, based on known and published protocols.

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