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Tag Archives: Batteries

Bob Walker’s Resignation Fuels Fuel Cell Prioritization Debate

Posted in Cleantech; Patent

Former Congressman, Robert S. Walker, resigned this month from the federal government’s Hydrogen and Fuel Cell Technical Advisory Committee (HTAC). Walker’s resignation letter was frank. The resignation was, perhaps, not surprising as a prior member had already resigned (Byron McCormick) and the HTAC’s March 2011 message to the Department of Energy was submitted with "some dismay." The stated concern is that the Obama Administration is cutting funding and publicly questioning the viability of making fuel cells a priority, suggesting they are a "distant dream." Some leaders in the electric vehicle industry have also been critical of fuel cell viability. However, other countries seem to continue to push ahead on fuel cell vehicles. So will the United States fall behind in this sector?

Nanotechnology is an integral technology for both batteries and fuel cells. 11% of the class 977 patent publications as of April 14, 2011 mention batteries, although only 4% mention fuel cells. Nevertheless, fewer fuel cell patent publications (141) mention the term in the abstract, title, or claims compared to battery patent publications (215). Both are clearly important applications of nanotechnology in the cleantech space.

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Lithium-Ion Battery Start-Ups Gain Stimulus Funding

Posted in Cleantech

If A123Systems receipt of a $249 million Department of Energy grant and later success as the largest IPO of 2009 was any indicator, battery start-ups in 2010 are likely to lead the wave of cleantech success. For example, hybrid cars are taking on an increasing portion of the automotive market and in turn, the development of efficient lithium-ion batteries is a continuing hot topic in the research world. 

As earth2tech recently highlighted in, 20 Battery Startups Hitting the Road With Lithium-ion, many battery start-up companies are currently focused on lithium-ion and some will likely succeed.

Nanotechnology, albeit small in size, is driving big impacts on advanced materials and cleantech.

Alternatives to Lead-Acid Batteries: Paper or Plastic?

Posted in Electronic Devices

Since the accidental discovery of metal-like doped polyacetylene in the 1970s, polymer battery research has been driven by the potential of low-cost and environmentally friendly power alternatives to lead-acid batteries. More recent discoveries of new conductive organic materials with higher power densities have also accelerated the the development of flexible "plastic" batteries. 

When it comes to batteries of the future, Professor Yi Cui of Stanford University may soon have us asking, "Paper or Plastic?"

Cui’s research group has recently demonstrated a highly conductive storage device formed by coating a sheet of commercially available paper with ink made of carbon nanotubes and silver nanowires.  Like ink absorbs into paper, the nanotube ink is similarly absorbed due to the small diameters of the solution processible nanomaterials.

With the potential of lasting through 40,000 charge-discharge cycles, these paper batteries may also offer a much longer lifetime than lithium batteries.