Hierarchically structured nanocarbon electrodes for flexible solid lithium batteries

Date

2013-09-01

Author

Wei, Di
Hiralal, Pritesh
Wang, Haolan
Ünalan, Hüsnü Emrah
Rouvala, Markku
Alexandrou, Ioannis
Andrew, Piers
Ryhaenen, Tapani
Amaratunga, Gehan A. J.

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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The ever increasing demand for storage of electrical energy in portable electronic devices and electric vehicles is driving technological improvements in rechargeable batteries. Lithium (Li) batteries have many advantages over other rechargeable battery technologies, including high specific energy and energy density, operation over a wide range of temperatures (-40 to 70 degrees C) and a low self-discharge rate, which translates into a long shelf-life (similar to 10 years) [1]. However, upon release of the first generation of rechargeable Li batteries, explosions related to the shorting of the circuit through Li dendrites bridging the anode and cathode were observed. As a result, Li metal batteries today are generally relegated to non-rechargeable primary battery applications, because the dendritic growth of Li is associated with the charging and discharging process. However, there still remain significant advantages in realizing rechargeable secondary batteries based on Li metal anodes because they possess superior electrical conductivity, higher specific energy and lower heat generation due to lower internal resistance. One of the most practical solutions is to use a solid polymer electrolyte to act as a physical barrier against dendrite growth. This may enable the use of Li metal once again in rechargeable secondary batteries [2]. Here we report a flexible and solid Li battery using a polymer electrolyte with a hierarchical and highly porous nanocarbon electrode comprising aligned multiwalled carbon nanotubes (CNTs) and carbon nanohorns (CNHs). Electrodes with high specific surface area are realized through the combination of CNHs with CNTs and provide a significant performance enhancement to the solid Li battery performance.

Subject Keywords

Renewable Energy, Sustainability and the Environment, Electrical and Electronic Engineering, General Materials Science

URI

https://hdl.handle.net/11511/40434

Journal

NANO ENERGY

DOI

https://doi.org/10.1016/j.nanoen.2013.04.004

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

D. Wei et al., “Hierarchically structured nanocarbon electrodes for flexible solid lithium batteries,” NANO ENERGY, pp. 1054–1062, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40434.