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Flexible Thin Film Solid State Lithium Ion Batteries

National Renewable Energy Laboratory

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Technology Marketing Summary

Batteries are electrochemical cells which store and supply electrical energy as a product of a chemical reaction. In their simplest conceptualization, batteries have two electrodes, one that supplies electrons by virtue of an oxidation process occurring at that electrode and a second one that consumes electrons by virtue of a reduction process occurring at that electrode. Thin film ion batteries, including those of the thin film solid state lithium ion type, can be prepared from various deposition techniques to fabricate anode, cathode, and electrolyte materials bonded together to form the battery, individual cells of which may typically be less than about 25 microns in thickness. Such techniques may typically include depositing thin films of such materials using vacuum deposition or other techniques that result in similar thin films, to produce the thin film batteries. Thin film batteries are often employed in applications in which space and weight may preferably be conserved and extremely long cycle life may be desired.


Scientists at the National Renewable Energy Laboratory (NREL) have created a novel way of arranging thin film battery structures, using flexible thin films on thin, flexible substrates. The structures allow stacking or rolling of thin film batteries in a way such that the storage density of such structures can rival bulk batteries while retaining the beneficial attributes of the thin film batteries (e.g., long cycle life).

  • Conserved space and weight
  • Long cycle life
Applications and Industries
  • Intermediate to large power applications for secondary batteries
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Application 20110117417
Flexible Thin Film Solid State Lithium Ion Batteries
Exemplary flexible thin film solid state lithium ion batteries (10) and methods for making the same are disclosed. An exemplary flexible solid state thin film electrochemical device (10) may include a flexible substrate (12), first (14) and second electrodes (18), and an electrolyte (16) disposed between the first (14) and second electrodes (18). The electrolyte (16) is disposed on the flexible substrate (12). The first electrode (14) is disposed on the electrolyte (16), and the second electrode (18) having been buried between the electrolyte (16) and the substrate (12).
National Renewable Energy Laboratory 02/25/2008
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
NREL ROI 07-13Licensed - only non-exclusive rights availableAvailable - Limited availability03/03/201603/07/2016

Contact NREL About This Technology

To: Erin Beaumont<>