Journal
INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT
Volume 22, Issue 1, Pages 66-81Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11367-015-0942-3
Keywords
Cascading reuse; Electric vehicles; Lead-acid battery; Lithium-ion battery; Stationary energy storage
Categories
Funding
- Golisano Institute for Sustainability
- New York State Energy Research and Development Authority (NYSERDA) [PON 18503]
- National Science Foundation Environmental Sustainability directorate [CBET-1254688]
- National Science Foundation Environmental Health and Safety of Nanomaterials directorate [CBET-1133425]
- New York State Pollution Prevention Institute
- New York Battery and Energy Storage Technology Consortium (NYBEST)
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1254688] Funding Source: National Science Foundation
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The purpose of this study was to analyze the environmental trade-offs of cascading reuse of electric vehicle (EV) lithium-ion batteries (LIBs) in stationary energy storage at automotive end-of-life. Two systems were jointly analyzed to address the consideration of stakeholder groups corresponding to both first (EV) and second life (stationary energy storage) battery applications. The environmental feasibility criterion was defined by an equivalent-functionality lead-acid (PbA) battery. A critical methodological challenge addressed was the allocation of environmental impacts associated with producing LIBs across the EV and stationary use systems. The model also tested sensitivity to parameters such as the fraction of battery cells viable for reuse, service life of refurbished cells, and PbA battery efficiency. From the perspective of EV applications, cascading reuse of an LIB in stationary energy storage can reduce net cumulative energy demand and global warming potential by 15 % under conservative estimates and by as much as 70 % in ideal refurbishment and reuse conditions. When post-EV LIB cells were compared directly to a new PbA system for stationary energy storage, the reused cells generally had lower environmental impacts, except in scenarios where very few of the initial battery cells and modules could be reused and where reliability was low (e.g., life span of 1 year or less) in the secondary application. These findings demonstrate that EV LIB reuse in stationary application has the potential for dual benefit-both from the perspective of offsetting initial manufacturing impacts by extending battery life span as well as avoiding production and use of a less-efficient PbA system. It is concluded that reuse decisions and diversion of EV LIBs toward suitable stationary applications can be based on life cycle centric studies. However, technical feasibility of these systems must still be evaluated, particularly with respect to the ability to rapidly analyze the reliability of EV LIB cells, modules, or packs for refurbishment and reuse in secondary applications.
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