Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras

Binary Reaction Embedded Anode for High Current Density and Long Cycle Life Lithium Ion Battery

Categories for this Invention

Categories: Electronics & Circuits | Chemistry & Chemical Analysis

Industry: Energy Storage Technology

Applications: Portable Electronics, e-vehicles, Renewable Energy Storage, Consumer Electronics, Automotive, Energy Storage Systems

Market: The global lithium-ion battery anode market was worth USD 7.1 B in 2020 and is further projected to reach USD 24.8 B by 2027, growing at a CAGR of 19.6% in forecast period.

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Problem Statement

  • Lightweight, high-power rechargeable batteries are crucial for compact devices.
  • Lithium-ion batteries are ideal for portability.
  • Electrode material integrity is key for high current density and long battery life.
  • Graphite is used in commercial lithium ion batteries due to its cycle stability and long cycle life, but has limited storage capacity.
  • Silicon nanostructures offer higher ion storage but may lead to SEI formation.
  • There is a pressing need for improved battery materials with higher capacity & durability.
  • The instant patent disclosure addresses above mentioned issues, and provides an innovative, high-capacity, long-lasting anode.

Technology

The present patent disclosure provides a Binary Reaction Embedded Anode for High Current Density and Long Cycle Life Lithium Ion Battery, comprises:

  • a carbon nanotube material having partially exfoliated carbon nanotubes; and sulphur, wherein the sulphur is bonded to the carbon in the carbon nanotube matrix.
  • conducting carbon, and polyvinylidene fluoride (PVDF) binder.

The carbon nanotubes are any of single walled carbon nanotubes, multi-walled carbon nanotubes or other metal oxide based structures modified with sulphur.

Method:

Key Features / Value Proposition

  • The cell is capable of forming a stable solid-electrolyte interphase at a current density of 150 mA g-1 or greater.
  • The cell retains a capacity of 200 mA h g-1 at a current density of 10 A g-1 for 7370 cycles or more and the discharge capacity of the cell after 10,000 cycles is 150 mA h g-1 or more.
  • The anode is substantially free of elemental Sulphur. The carbon to Sulphur ratio is 9:1.

Questions about this Technology?

Contact For Licensing

sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in

Research Lab

Prof. Ramaprabhu S 

Department of Physics

Intellectual Property

  • IITM IDF Ref.: 1449
  • IP Grant No.: 394781

Technology Readiness Level

TRL- 3

Validated in Lab

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