# Poly(ionic liquid)-derived N-doped carbons with hierarchical porosity for lithium and sodium ion batteries

## TL;DR

This paper presents a simple method to produce N-doped porous carbons from poly(ionic liquids) with hierarchical structures, enhancing their performance as electrodes in lithium and sodium ion batteries.

## Contribution

It introduces a novel synthesis approach for N-doped carbons with hierarchical porosity using PIL and GO-stabilized templates, improving battery electrode properties.

## Key findings

- Achieved a specific surface area of 561 m2/g in NPCs.
- Delivered 1013 mAh/g capacity in LIBs over 200 cycles.
- Maintained 204 mAh/g capacity in SIBs over 100 cycles.

## Abstract

The performance of lithium and sodium ion batteries relies notably on the accessibility to carbon electrodes of controllable porous structure and chemical composition. This work reports a facile synthesis of well-defined porous N-doped carbons (NPCs) using a poly(ionic liquid) (PIL) as precursor, and graphene oxide (GO)-stabilized poly(methyl methacrylate) (PMMA) nanoparticles as sacrificial template. The GO-stabilized PMMA nanoparticles were first prepared and then decorated by a thin PIL coating before carbonization. The resulting NPCs reached a satisfactory specific surface area of up to 561 m2/g and a hierarchically meso- and macroporous structure while keeping a nitrogen content of 2.6 wt %. Such NPCs delivered a high reversible charge/discharge capacity of 1013 mA h/g over 200 cycles at 0.4 A/g for lithium ion batteries (LIBs), and showed a good capacity of 204 mA h/g over 100 cycles at 0.1 A/g for sodium ion batteries (SIBs).

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Source: https://tomesphere.com/paper/1904.01105