Nutty Carbon: Morphology Replicating Hard Carbon from Walnut Shell for Na Ion Battery Anode

ACS Omega
Malik WahidSatishchandra Ogale

Abstract

Efficient Na ion intercalation/deintercalation in the semigraphitic lattice of a hard carbon derived from the walnut shell is demonstrated. High-temperature (1000 °C) pyrolysis of walnut shells under an inert atmosphere yields a hard carbon with a low surface area (59 m2 g-1) and a large interplanar c axis separation of 0.39-0.36 nm as compared to 0.32 nm for graphite, suitable for Na ion intercalation/deintercalation. A stable reversible capacity of 257 mAh g-1 is observed at a current density of 50 mA g-1 for such nutshell-derived carbon (NDC) with an impressive rate performance. No loss of electrochemical performance is observed for high current cycling (100 mA g-1 → 2 A g-1 → 100 mA g-1). Additionally, the NDC shows remarkably stable electrochemical performance up to 300 charge-discharge cycles at 100 mA g-1 with a minimal drop in capacity.

References

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Citations

Mar 6, 2019·ChemSusChem·Purna Chandra RathJeng-Kuei Chang
May 21, 2020·Frontiers in Plant Science·Nannan XiaoNotburga Gierlinger
Jun 1, 2021·Frontiers in Neural Circuits·Kelly L L WongGeorge J Augustine
Jan 16, 2022·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·M Anne SawhneyJenny Baker

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Methods Mentioned

BETA
X-ray
ESR

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