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Journal Article

Ultrathin positively charged electrode skin for durable anion-intercalation battery chemistries

MPS-Authors
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Wang,  Zhiyong       
Department of Synthetic Materials and Functional Devices (SMFD), Max Planck Institute of Microstructure Physics, Max Planck Society;

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Hashemi,  Payam
Department of Synthetic Materials and Functional Devices (SMFD), Max Planck Institute of Microstructure Physics, Max Planck Society;

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Shaygan Nia,  Ali
Department of Synthetic Materials and Functional Devices (SMFD), Max Planck Institute of Microstructure Physics, Max Planck Society;

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Feng,  Xinliang       
Department of Synthetic Materials and Functional Devices (SMFD), Max Planck Institute of Microstructure Physics, Max Planck Society;

External Resource

https://doi.org/10.1038/s41467-023-36384-5
(Publisher version)

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s41467-023-36384-5.pdf
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Citation

Sabaghi, D., Wang, Z., Bhauriyal, P., Lu, Q., Morag, A., Mikhailovia, D., et al. (2023). Ultrathin positively charged electrode skin for durable anion-intercalation battery chemistries. Nature Communications, 14: 760. doi:10.1038/s41467-023-36384-5.


Cite as: https://hdl.handle.net/21.11116/0000-000C-B7CE-E
Abstract
The anion-intercalation chemistries of graphite have the potential to construct batteries with promising energy and power breakthroughs. Here, we report the use of an ultrathin, positively charged two-dimensional poly(pyridinium salt) membrane (C2DP) as the graphite electrode skin to overcome the critical durability problem. Large-area C2DP enables the conformal coating on the graphite electrode, remarkably alleviating the electrolyte. Meanwhile, the dense face-on oriented single crystals with ultrathin thickness and cationic backbones allow C2DP with high anion-transport capability and selectivity. Such desirable anion-transport properties of C2DP prevent the cation/solvent co-intercalation into the graphite electrode and suppress the consequent structure collapse. An impressive PF6−-intercalation durability is demonstrated for the C2DP-covered graphite electrode, with capacity retention of 92.8% after 1000 cycles at 1 C and Coulombic efficiencies of > 99%. The feasibility of constructing artificial ion-regulating electrode skins with precisely customized two-dimensional polymers offers viable means to promote problematic battery chemistries.