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The International Journal of Life Cycle Assessment

, Volume 19, Issue 11, pp 1866–1890

First Online: 21 August 2014Received: 24 September 2013Accepted: 30 July 2014

Abstract

PurposeThe purpose of this review article is to investigate the usefulness of different types of life cycle assessment LCA studies of electrified vehicles to provide robust and relevant stakeholder information. It presents synthesized conclusions based on 79 papers. Another objective is to search for explanations to divergence and -complexity- of results found by other overviewing papers in the research field, and to compile methodological learnings. The hypothesis was that such divergence could be explained by differences in goal and scope definitions of the reviewed LCA studies.

MethodsThe review has set special attention to the goal and scope formulation of all included studies. First, completeness and clarity have been assessed in view of the ISO standard’s ISO 2006a, b recommendation for goal definition. Secondly, studies have been categorized based on technical and methodological scope, and searched for coherent conclusions.

Results and discussionComprehensive goal formulation according to the ISO standard ISO 2006a, b is absent in most reviewed studies. Few give any account of the time scope, indicating the temporal validity of results and conclusions. Furthermore, most studies focus on today’s electric vehicle technology, which is under strong development. Consequently, there is a lack of future time perspective, e.g., to advances in material processing, manufacturing of parts, and changes in electricity production. Nevertheless, robust assessment conclusions may still be identified. Most obvious is that electricity production is the main cause of environmental impact for externally chargeable vehicles. If, and only if, the charging electricity has very low emissions of fossil carbon, electric vehicles can reach their full potential in mitigating global warming. Consequently, it is surprising that almost no studies make this stipulation a main conclusion and try to convey it as a clear message to relevant stakeholders. Also, obtaining resources can be observed as a key area for future research. In mining, leakage of toxic substances from mine tailings has been highlighted. Efficient recycling, which is often assumed in LCA studies of electrified vehicles, may reduce demand for virgin resources and production energy. However, its realization remains a future challenge.

ConclusionsLCA studies with clearly stated purposes and time scope are key to stakeholder lessons and guidance. It is also necessary for quality assurance. LCA practitioners studying hybrid and electric vehicles are strongly recommended to provide comprehensive and clear goal and scope formulation in line with the ISO standard ISO 2006a, b.

KeywordsBattery Electric vehicle Hybrid LCA Meta-analysis Well-to-wheels Responsible editor: Hans-Joerg Althaus

Electronic supplementary materialThe online version of this article doi:10.1007-s11367-014-0788-0 contains supplementary material, which is available to authorized users.

An erratum to this article can be found at http:-dx.doi.org-10.1007-s11367-015-1004-6.

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Autor: Anders Nordelöf - Maarten Messagie - Anne-Marie Tillman - Maria Ljunggren Söderman - Joeri Van Mierlo

Fuente: https://link.springer.com/







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