Life cycle assessment of greenhouse gas emissions from plug-in hybrid vehicles: implications for policy.

Plug-in hybrid electric vehicles (PHEVs), which use electricity from the grid to power a portion of travel, could play a role in reducing greenhouse gas (GHG) emissions from the transport sector. However, meaningful GHG emissions reductions with PHEVs are conditional on low-carbon electricity sources. We assess life cycle GHG emissions from PHEVs and find that they reduce GHG emissions by 32% compared to conventional vehicles, but have small reductions compared to traditional hybrids. Batteries are an important component of PHEVs, and GHGs associated with lithium-ion battery materials and production account for 2–5% of life cycle emissions from PHEVs. We consider cellulosic ethanol use and various carbon intensities of electricity. The reduced liquid fuel requirements of PHEVs could leverage limited cellulosic ethanol resources. Electricity generation infrastructure is long-lived, and technology decisions within the next decade about electricity supplies in the power sector will affect the potential for large GHG emissions reductions with PHEVs for several decades.

[1]  H. H. Wooten.  Major Uses of Land in the United States , 1953 .

[2]  Lee R. Lynd,et al.  Overview and evaluation of fuel ethanol from cellulosic biomass , 1996 .

[3]  Arpad Horvath,et al.  Economic Input–Output Models for Environmental Life-Cycle Assessment , 1998 .

[4]  S. Joshi.  Product Environmental Life‐Cycle Assessment Using Input‐Output Techniques , 1999 .

[5]  Michael Wang,et al.  Development and use of GREET 1.6 fuel-cycle model for transportation fuels and vehicle technologies. , 2001 .

[6]  R. N. Elliott,et al.  American Council for an Energy-Efficient Economy , 2002 .

[7]  Lester B. Lave,et al.  An environmental-economic evaluation of hybrid electric vehicles: Toyota's Prius vs. its conventional internal combustion engine Corolla , 2002 .

[8]  M. Noguer,et al.  Climate change 2001: The scientific basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change , 2002 .

[9]  Heather L MacLean,et al.  Life cycle assessment of automobile/fuel options. , 2003, Environmental science & technology.

[10]  C. Boyden Gray,et al.  The Future of Energy Policy , 2003 .

[11]  Gjalt Huppes,et al.  System boundary selection in life-cycle inventories using hybrid approaches. , 2004, Environmental science & technology.

[12]  N. Demirdöven,et al.  Hybrid Cars Now, Fuel Cell Cars Later , 2004, Science.

[13]  Matthias Finkbeiner,et al.  Life cycle assessment of lightweight and end-of-life scenarios for generic compact class passenger vehicles , 2004 .

[14]  Willett Kempton,et al.  Vehicle-to-grid power fundamentals: Calculating capacity and net revenue , 2005 .

[15]  A. Faaij,et al.  Ethanol from lignocellulosic biomass: techno-economic performance in short-, middle- and long-term , 2005 .

[16]  Gerald L. Kulcinski,et al.  US electric industry response to carbon constraint: a life-cycle assessment of supply side alternatives , 2005 .

[17]  C. Rydh,et al.  Energy analysis of batteries in photovoltaic systems. Part I: Performance and energy requirements , 2005 .

[18]  W Michael Griffin,et al.  Modeling switchgrass derived cellulosic ethanol distribution in the United States. , 2006, Environmental science & technology.

[19]  Andrew D. Jones,et al.  Supporting Online Material for: Ethanol Can Contribute To Energy and Environmental Goals , 2006 .

[20]  Mark A. Delucchi,et al.  A Retail and Lifecycle Cost Analysis of Hybrid Electric Vehicles , 2006 .

[21]  M Granger Morgan.  Don't Grandfather Coal Plants , 2006, Science.

[22]  D. Tilman,et al.  Carbon-Negative Biofuels from Low-Input High-Diversity Grassland Biomass , 2006, Science.

[23]  H. S. Matthews,et al.  Comparative life-cycle air emissions of coal, domestic natural gas, LNG, and SNG for electricity generation. , 2007, Environmental science & technology.

[24]  Mark Z. Jacobson,et al.  Large CO2 reductions via offshore wind power matched to inherent storage in energy end‐uses , 2007 .

[25]  Shiva Habibi,et al.  Environmental implications of municipal solid waste-derived ethanol. , 2007, Environmental science & technology.

[26]  A. Frank.  Plug-in hybrid vehicles for a sustainable future , 2007 .

[27]  Andrew F. Burke,et al.  Batteries and Ultracapacitors for Electric, Hybrid, and Fuel Cell Vehicles , 2007, Proceedings of the IEEE.

[28]  R. Perrin,et al.  Net energy of cellulosic ethanol from switchgrass , 2008, Proceedings of the National Academy of Sciences.

[29]  Craig H Stephan,et al.  Environmental and energy implications of plug-in hybrid-electric vehicles. , 2008, Environmental science & technology.

[30]  Thomas H. Bradley,et al.  Design, demonstrations and sustainability impact assessments for plug-in hybrid electric vehicles , 2009 .