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Graphene Protected Si Nano Spheres (Interconnected) For Developing High Energy Density Li Ion Battery

Subcategory (under Clean Energy): Cross Cutting
Technology Readiness Level (TRL): TRL 4 - Early prototype
Technology Outline (Process Description)

Co-deposition of Si nano-spheres and grapheme has been carried out from ionic liquid bath at room temperature on Au, grapheme coated Cu and Cu substrate. The as coated thin-film is used as negative electrode for Li ion battery. In a CR2032 coin cell, the developed codeposited Si showed a charge capacity of 1040 mAh/g at a current rate of 0.2C after 100 cycle compared to only 254 mAh/g for bare Si.

Salient Features/Advantages

  • Si nano-spheres have been stabilized by rapping with graphene in the co-deposition process. The modified electrode showed a better capacity retention than the bare Si counterpart. Higher capacity has been observed in grapheme coated Si electrode as well

Key Outcomes

  • Relatively stable Si negative electrode is designed by rapping it with graphene in a single unit operation on Cu substrate
  • A higher capacity of 1040 mAh/g has been regis- tered after 100 cycle at 0.2C rate

IP Protection details

  • Patent filed (Title, national/International): Nil
  • Patents Granted: Nil
  • Copyrights obtained /progress on commercialisation /Pl. specify connect with industry: Nil

Contact details (for more information)

  • Nodal Person name: Prof. Indrajit Mukhopadhyay
  • Email ID: Indrajit.m@sse.pdpu.ac.in
  • Organisation name (Relevant link/web page): Pandit Deendayal Energy University
Supporting Photographs/Images

Organizations involved in the development (logo/name)

Solar Research and Development Centre, Pandit Deendayal Energy University, Gandhinagar

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