Separator-Free Energy Storage Devices and Methods

Principal Investigators: Jianjun Wei

Application Number: PCT/US18/25083

UNCG Innovation: 15-0018

Category: Nanoscience


The invention is a method to deposit transition metal oxide at carbon electrodes with morphology controllable nanostructures that provide enhanced energy storage capability. The metal oxide materials are derived from may be of high dielectric (high-k) constant and/or redox properties. The carbon substrate can be composited of nano-carbon materials, such carbon nanotubes, carbon nanofibers, carbon nanodots. The methods used in this invention for morphology control including electrochemical deposition, atomic layered deposition (ALD) or traditional chemical vapor deposition (CVD). Currently we have developed a process using electrochemical deposition to obtain different types of nanofeatured metal oxide on carbon nanofiber or carbon nanotube papers/films and demonstrated improved energy storage, potentially generate high performance electrochemical double-layered supercapacitors (or pseudocapacitors).

Immediate/Future Application:

  • A method/process to deposit metal oxide to a conductive substrate;
  • Controllable morphology of the metal oxide at a conductive substrate can be produced
  • The conductive substrate with metal oxide can be used as electrode that provides capability of energy storage
  • The metal oxide/conductive electrodes can form an electrochemical double layer capacitor (EDLC) with enhanced energy storage (supercapacitors or pseudocapacitors, or chargeable batteries)

Inventor info: Jianjun Wei