Cesium Ion-Mediated Microporous Carbon for CO2 Capture and Lithium-Ion Storage

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Activated carbon has been used in a wide range of applications owing to its large specific area, facile synthesis, and low cost. The synthesis of activated carbon mostly relies on potassium hydroxide (KOH)-mediated activation which leads to the formation of micropores (<2 nm) after a washing step with acid. Here we report the preparation of activated carbon with an anomalously large surface area (3288 m(2) g(-1)), obtained by employing an activation process mediated by cesium (Cs) ions. The high affinity of the carbon lattice for Cs ions induces immense interlayer expansion upon complexation of the intercalant Cs ion with the carbon host. Furthermore, the Cs-activation process maintains the nitrogen content of the carbon source by enabling the activation process at low temperature. The large surface area and well-preserved nitrogen content of Cs-activated carbon takes advantage of its enhanced interaction with CO2 molecules (for superior CO2 capture) and lithium ions (for improved Li ion storage), respectively. The present investigation unveils a new approach toward tuning the key structural properties of activated carbon; that is, controlling the affinity of the carbon host for the intercalant ion when they engage in complex formation during the activation process.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2021-02
Language
English
Article Type
Article
Citation

CHEMNANOMAT, v.7, no.2, pp.150 - 157

ISSN
2199-692X
DOI
10.1002/cnma.202000541
URI
http://hdl.handle.net/10203/281180
Appears in Collection
CBE-Journal Papers(저널논문)
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