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Angew Chem Int Ed Engl
; 60(10): 5114-5120, 2021 Mar 01.
Artículo
en Inglés
| MEDLINE
| ID: mdl-33300173
RESUMEN
Extremely high capacity hard carbon for Na-ion battery, delivering 478â mAh g-1 , is successfully synthesized by heating a freeze-dried mixture of magnesium gluconate and glucose by a MgO-template technique. Influences of synthetic conditions and nano-structures on electrochemical Na storage properties in the hard carbon are systematically studied to maximize the reversible capacity. Nano-sized MgO particles are formed in a carbon matrix prepared by pre-treatment of the mixture at 600 °C. Through acid leaching of MgO and carbonization at 1500 °C, resultant hard carbon demonstrates an extraordinarily large reversible capacity of 478â mAh g-1 with a high Coulombic efficiency of 88 % at the first cycle.