Linh T. Le & Louis Ting

Mentor: Don Green

Technology Entrepreneurship Prof Chuck Eesley, Stanford University

� Introduction � Prototype Description

� Differentiators � Apply Feedbacks on Working Prototype

Supercapacitor Advantages §  Higher specific power (~100x

batteries) §  Rapid charge/discharge times §  Millions of charge/discharge cycles §  State of charge indication §  Efficiencies (98%) §  Stable performance §  Perform well at extreme temperatures

BatteryX Sketch

Simon et al., Nature Materials, 2008

1) Increase Performance

2) Reduce Cost

Graphene Discovery

First Roll to Roll

Graphene � Novel Properties •  Electrically conductive •  Optically transparent •  Mechanically strong & conformal •  High surface area •  Chemically & electrochemically

inert

� Diverse Production Methods •  $50/kg anticipated in 3 years for

graphite-derived

� Inkjet-Printed Graphene Micropatterns •  Electrodes for cheap, flexible energy

storage & generation devices

3D Assembly with Inkjet-Printed 2D Graphene Nanosheets

Micropatterns Inkjet-Printed Graphene

[1] Stoller, 2008; [2] Vivekchand, 2008; [3] Wang, 2009

Ti Foil Current

Collector Teflon Block