Scientists Find the Potential Key to Longer-Lasting Sodium Batteries for Electric Vehicles – CleanTechnica

The Science

Lithium-ion batteries are the standard for electric vehicles, but their raw materials are costly and can have unreliable supply chains. Sodium-ion batteries are an alternative that could alleviate some of these challenges. However, the performance of these batteries declines rapidly with repeated charges and discharges. This is a major barrier to bringing these devices to the marketplace. In this study, researchers used a combination of electron microscopy and X-ray scattering to find a cause of this decline in performance: defects introduced in making the cathode material. This knowledge will help researchers design better cathodes for longer-lasting sodium-ion batteries.

The Impact

Using the insights gained from this study, battery developers may be able to create cathodes for sodium-ion batteries with virtually no defects. These new devices could cost less than current lithium-based batteries and have longer lifetimes. This new technology could lead to more affordable electric vehicles with longer driving ranges and faster charging times. Less expensive batteries could also lead to lower costs for energy storage on the electric grid.

Summary

The key to this research, by a team from Argonne National Laboratory, University of Wisconsin-Milwaukee, and Stanford University, was to combine different experimental techniques. The study examined the newly synthesized cathode materials using research tools at two Department of Energy (DOE) Office of Science user facilities: high-energy X-ray beams at the Advanced Photon Source and the analytical capabilities of the Center for Nanoscale Materials. The synthesis process involves slowly heating the cathode materials before rapidly dropping the temperature. Using transmission electron microscopy and surface X-ray diffraction to examine this material during this process in situ, scientists concluded that defects formed during the cooling-off period. These defects cause cracking of the cathode particles and a decline in performance, which only gets worse when cathodes are charged quickly or at high temperatures. Eventually, this can result in a “structural earthquake” in the cathode, leading to catastrophic battery failure.

Armed with this knowledge, battery developers can adjust the conditions during battery synthesis and control the defects in sodium-ion battery cathodes. This work leverages the capability of both user facilities to capture real-time information on transformations in materials as they happen, under controllable changes in the sample environment. These findings highlight the importance of eliminating these defects to ensure long-term stable cycling of sodium-ion batteries at higher voltages.

Funding

Funding of this research was provided by the DOE Vehicle Technologies Office. Work was performed at the Advanced Photon Source and the Center for Nanoscale Materials, both DOE Office of Science user facilities.

Publications

1. Xu, GL., et al., Native lattice strain induced structural earthquake in sodium layered oxide cathodes. Nature Communications 13, 436 (2022). [DOI: 10.1038/s41467-022-28052-x]

Related: Pivotal Battery Discovery could Impact Transportation and the Grid, Argonne National Laboratory News

Article from Department of Energy, Office of Science

SDGs, Targets, and Indicators

SDGs Addressed or Connected to the Issues Highlighted in the Article:

1. SDG 7: Affordable and Clean Energy
2. SDG 9: Industry, Innovation, and Infrastructure
3. SDG 11: Sustainable Cities and Communities
4. SDG 13: Climate Action

Specific Targets Under Those SDGs Based on the Article’s Content:

• SDG 7.2: Increase substantially the share of renewable energy in the global energy mix
• SDG 9.4: Upgrade infrastructure and retrofit industries to make them sustainable
• SDG 11.2: Provide access to safe, affordable, accessible, and sustainable transport systems for all
• SDG 13.2: Integrate climate change measures into national policies, strategies, and planning

Indicators Mentioned or Implied in the Article:

• Cost reduction of sodium-ion batteries compared to lithium-based batteries
• Increase in the lifetime of sodium-ion batteries
• Improvement in the driving range and charging times of electric vehicles
• Reduction in costs for energy storage on the electric grid

Table: SDGs, Targets, and Indicators

Based on the article, the issues highlighted are connected to multiple Sustainable Development Goals (SDGs). SDG 7 (Affordable and Clean Energy) is addressed through the potential cost reduction of sodium-ion batteries compared to lithium-based batteries, which can contribute to increasing the share of renewable energy in the global energy mix (SDG 7.2). SDG 9 (Industry, Innovation, and Infrastructure) is connected to upgrading infrastructure and retrofitting industries to make them sustainable (SDG 9.4), as the research focuses on improving the performance and lifetime of sodium-ion batteries. SDG 11 (Sustainable Cities and Communities) is relevant due to the potential impact on electric vehicles, including longer driving ranges and faster charging times, which aligns with the target of providing access to safe, affordable, accessible, and sustainable transport systems for all (SDG 11.2). Finally, SDG 13 (Climate Action) is connected to the reduction in costs for energy storage on the electric grid, which can contribute to integrating climate change measures into national policies, strategies, and planning (SDG 13.2).

Behold! This splendid article springs forth from the wellspring of knowledge, shaped by a wondrous proprietary AI technology that delved into a vast ocean of data, illuminating the path towards the Sustainable Development Goals. Remember that all rights are reserved by SDG Investors LLC, empowering us to champion progress together.

Source: cleantechnica.com

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