Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 6, Issue 35, Pages 16844-16848Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta05203d
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Funding
- JST A-STEP [AS2614056L]
- JSPS KAKENHI [JP16K14103, JP16K18242]
- MEXT program Elements Strategy Initiative to Form Core Research Center (since 2012)
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Non-graphitizable hard carbons are synthesized through carbonization of glucose, sucrose, maltose, cellulose, glycogen, and amylopectin. Cellulose-derived carbon delivers superior reversible sodiation capacity, and optimal carbonization for a higher capacity Na-ion battery is found to be two-step heating of cellulose at 275 degrees C and 1300-1500 degrees C in air and argon, respectively. The hard carbon delivers a higher reversible capacity of 353 mA h g(-1) in a Na cell. The 275 degrees C heating is important to regulate dehydration and cross-linkage degrees of cellulose, which affect the nano-scale structure of hard carbons. The cellulose-derived carbons deliver 523 and 290 mA h g(-1) in Li and K cells, respectively.
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