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  1. Research
  2. Sustainable Energy
  3. Transportation
  4. Vehicle Technologies
  5. Vehicle Electrification

Vehicle Electrification

Leading battery research that
powers today’s electric vehicles

  • Vehicle Technologies
    • Emission Control
    • Energy-Efficient Mobility Systems
    • Lightweight Materials
    • Vehicle Electrification
  • Bioenergy Technologies
  • Hydrogen & Fuel Cells
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The gas- and diesel-powered automobiles traversing today’s highways are proving a challenge to our atmosphere. According to the Environmental Protection Agency, 29 percent of greenhouse gas emissions come from the transportation sector—and a major reason why is that more than 90 percent of the fuel used to power cars and other modes of transportation is petroleum-based.

The fact is—as of 2018—transportation has been the largest and fastest-growing source of climate pollution in the nation.

The answer is decarbonization—or reducing the amount of carbon dioxide emissions into the atmosphere. For the transportation sector, a significant way to achieve decarbonization is through vehicle electrification, which is the process of powering vehicles using electricity produced from renewable energy sources such as wind energy and hydropower instead of conventional sources such as petroleum and diesel. The national goal is to make half of all new vehicles sold in 2030 electric.

PNNL and collaborators are working closely with the U.S. Department of Energy’s (DOE’s) Vehicle Technologies Office (VTO) to solve challenges surrounding vehicle electrification for today’s automakers and bring breakthrough research and development to the industry.

Challenges of vehicle electrification

A large piece of vehicle electrification involves electric vehicles powered by batteries, which are steadily gaining popularity with consumers. However, there are challenges associated with developing batteries for these vehicles, such as the need to improve affordability and to make them longer lasting and more durable.

For example, today’s state-of-the-art electric vehicles are powered by lithium-ion batteries, which typically last about 1,000 cycles—meaning they can be fully charged and discharged 1,000 times before they sufficiently lose performance and require replacement. A vast improvement in power is the emerging lithium-metal battery, which holds almost twice the energy of lithium-ion batteries. Lithium-metal batteries are lighter weight as well, offering the prospect of lighter cars that go much farther on a single charge. But, similar to other battery types, lithium-metal batteries have been plagued by less-than-desirable life spans, lasting only a fraction of the time of today’s batteries.

In addition to challenges posed by batteries, with an anticipated influx of electric vehicles by the 2030 target, concerns have arisen about whether utilities, grid planners, and cities are prepared for the impact of fast-charging vehicles on electricity infrastructure—both in large metropolitan areas and smaller communities. Rolling brownouts or even complete blackouts in most regions could become a significant problem in the relatively near future as demand increases for charging electric vehicles.

Finally—in the materials science arena—the automotive industry needs improved functionality in materials, such as higher conductivity for increased motor efficiency, electronics, and lighter-weight components that are expected to power our future electric vehicles.

Breakthroughs in vehicle electrification

To help VTO address these challenges, PNNL scientists and engineers are at the forefront of electrochemical energy storage and chemical energy storage. PNNL is currently leading the Battery500 Consortium for DOE to address the fundamental challenges that enable next-generation lithium-metal batteries for electric vehicles that have potentially double the specific energy of current batteries so the vehicles can drive longer distances, last longer, and become more affordable to the consumer.

At the behest of VTO, PNNL scientists, along with industry, academic, and other national laboratory partners, are pushing the frontiers of advanced electrode and electrolyte materials and are developing strategies to integrate materials science, electrochemistry, and cell engineering to enable lithium-metal battery technology. In the Battery500 Consortium, all new ideas and materials are validated in realistic high-energy test batteries to make sure our findings are relevant to industry applications. The prototype batteries from the consortium have already achieved 350 Wh/kg and 400 Wh/kg energy outputs and world-record cycling stabilities.

As a huge enabler toward electrifying our nation’s transportation sector, PNNL is taking a stance of “infrastructure matters.” This quickly growing research area is focusing on smart charging management through the development of advanced multi-modal analytics and predictive tools to help decision-makers—both on the vehicle and grid sides—identify technology and infrastructure needs for better integration of electric vehicles. Our researchers are taking the helm on first-ever studies that evaluate several factors, including electric trucks for delivery and long haul, as well as smart vehicle charging strategies. Studies are providing utilities and grid planners with the information to understand the impacts to the grid and planning so that our national transportation and grid infrastructures can be optimized.

To complement the electrification efforts, teams of materials researchers at PNNL are studying and developing lightweight materials that will bring forth more fuel-efficient vehicles. Additionally, they are using these materials science and manufacturing skills to improve the functionally of metal alloys—such as copper and aluminum—that result in much higher conductivity for improving the performance of electric vehicle components while reducing aspects like motor volume and weight.

 

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Facilities

Advanced Battery Facility Redox Flow Battery Laboratories Environmental Molecular Sciences Laboratory

Research Topics

Sustainable Energy Transportation Vehicle Technologies Energy Storage Materials Sciences Energy-Efficient Mobility Systems Lightweight Materials Emission Control Vehicle Electrification

Contact

Michael Kintner-Meyer
Electrical Engineer
michael.kintner-meyer@pnnl.gov
(509) 375-4306

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