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A compliant and low-expansion 2-phase micro-architectured material, with potential application to solid-state Li-ion batteries

Accepted version
Peer-reviewed

Type

Article

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Authors

Abstract

A two-phase 2D lattice material is identified that possesses both a high macroscopic compliance and a low macroscopic coefficient of thermal expansion. The macroscopic effective properties of the lattice are analysed and the features that give high macroscopic compliance and low macroscopic actuation strain are identified. A detailed case study is presented to explore the potential of the lattice for use as a composite cathode in a solid-state Li-ion battery, taking into account the swelling of the active cathode material upon lithiation. A design map is developed to reveal the competition between battery capacity and degradation due to fracture of the composite cathode. The intent is to identify promising battery topologies and compositions by overcoming the usual problems associated with cathode swell during charge and discharge.

Description

Keywords

Lithium-ion battery, Multi-phase lattice material, Composite electrode, Lattice material, All-solid-state battery

Journal Title

Journal of the Mechanics and Physics of Solids

Conference Name

Journal ISSN

0022-5096
1873-4782

Volume Title

158

Publisher

Elsevier BV
Sponsorship
This work was supported by the ERC project ‘Multilat’ and by the Faraday Institution Solbat and FutureCat (grant number FIRG007 and FIRG017, respectively). Y.Z. is now supported by Shanghai Sailing Program (Project No. 20YF1452300) and the Fundamental Research Funds for the Central Universities .