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DOE OSTI · 1889496

Vertically assembled nanosheet networks for high-density thick battery electrodes

Ju, Zhengyu·King, Steven T.·Xu, Xiao·Zhang, Xiao·Raigama, Kasun U.·Takeuchi, Kenneth J.·Marschilok, Amy C.·Wang, Lei·Takeuchi, Esther S.·Yu, Guihua
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Abstract

As one of the prevailing energy storage systems, lithium-ion batteries (LIBs) have become an essential pillar in electric vehicles (EVs) during the past decade, contributing significantly to a carbon-neutral future. However, the complete transition to electric vehicles requires LIBs with yet higher energy and power densities. Here, we propose an effective methodology via controlled nanosheet self-assembly to prepare low-tortuosity yet high-density and high-toughness thick electrodes. By introducing a delicate densification in a three-dimensionally interconnected nanosheet network to maintain its vertical architecture, facile electron and ion transports are enabled despite their high packing density. This dense and thick electrode is capable of delivering a high volumetric capacity >1,600 mAh cm −3 , with an areal capacity up to 32 mAh cm −2 , which is among the best reported in the literature. The high-performance electrodes with superior mechanical and electrochemical properties demonstrated in this work provide a potentially universal methodology in designing advanced battery electrodes with versatile anisotropic properties.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYassemblyhigh-densitylithium-ion batterylow-tortuositynanosheets

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Ju, Zhengyu, King, Steven T., Xu, Xiao, Zhang, Xiao, Raigama, Kasun U., Takeuchi, Kenneth J., Marschilok, Amy C., Wang, Lei, Takeuchi, Esther S., Yu, Guihua. 2022-09-26. Vertically assembled nanosheet networks for high-density thick battery electrodes. https://doi.org/10.1073/pnas.2212777119

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