New nano-engineering strategy shows potential for improved advanced energy storage

New nano-engineering strategy shows potential for improved advanced energy storage
Novel material nanoarchitecture enables the development of new-generation high-energy batteries beyond Li-ion chemistry Credit: University of Technology Sydney

The rapid development of renewable energy resources has triggered tremendous demands in large-scale, cost-efficient and high-energy-density stationary energy storage systems.

Lithium ion batteries (LIBs) have many advantages but there are much more abundant metallic elements available such as sodium, potassium, zinc and aluminum.

These elements have similar chemistries to lithium and have recently been extensively investigated, including (SIBs), potassium-ion batteries (PIBs), zinc-ion batteries (ZIBs), and aluminum-ion batteries (AIBs). Despite promising aspects relating to redox potential and density the development of these beyond-LIBs has been impeded by the lack of suitable electrode materials

New research led by Professor Guoxiu Wang from the University of Technology Sydney, and published in Nature Communications, describes a strategy using interface strain engineering in a 2-D graphene nanomaterial to produce a new type of cathode. Strain engineering is the process of tuning a material's properties by altering its mechanical or structural attributes.

"Beyond- are promising candidates for high-energy-density, low-cost and large-scale energy storage applications. However, the main challenge lies in the development of suitable electrode materials," " Professor Wang, Director of the UTS Centre for Clean Energy Technology, said.

"This research demonstrates a new type of zero-strain cathodes for reversible intercalation of beyond-Li+ ions (Na+, K+, Zn2+, Al3+) through interface strain engineering of a 2-D multilayered VOPO4-graphene heterostructure.

When applied as cathodes in K+-ion batteries, we achieved a high specific capacity of 160 mA h g-1 and a large of ~570 W h kg-1, presenting the best reported performance to date. Moreover, the as-prepared 2-D multilayered heterostructure can also be extended as cathodes for high-performance Na+, Zn2+, and Al3+-ion batteries.

The researchers say this work heralds a promising strategy to utilize strain engineering of 2-D materials for advanced energy storage applications.

"The strategy of strain engineering could be extended to many other nanomaterials for rational design of electrode materials towards high energy storage applications beyond lithium-ion chemistry," Professor Wang said.


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More information: Pan Xiong et al, Strain engineering of two-dimensional multilayered heterostructures for beyond-lithium-based rechargeable batteries, Nature Communications (2020). DOI: 10.1038/s41467-020-17014-w
Journal information: Nature Communications

Citation: New nano-engineering strategy shows potential for improved advanced energy storage (2020, July 6) retrieved 7 August 2020 from https://phys.org/news/2020-07-nano-engineering-strategy-potential-advanced-energy.html
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