Figure 1 : Learning rates using the traditional one-factor learning curve model for lithium-ion battery storage.

From: Energy storage deployment and innovation for the clean energy transition

Figure 1

a, Learning rate of economies of scale at 17.31%. b, Experience curve approach with a learning rate of 15.47% for cumulative production. c, Learning rates for cumulative patents, amounting to 31.43%. Prices are adjusted to 2015 US dollars. PCT is Patent Cooperation Treaty, an international patent treaty to protect inventions across nations.