MgO-Template Synthesis of Extremely High Capacity Hard Carbon for Na-Ion Battery

Azusa Kamiyama, Kei Kubota, Daisuke Igarashi, Yong Youn, Yoshitaka Tateyama, Hideka Ando, Kazuma Gotoh, Shinichi Komaba

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)


Extremely high capacity hard carbon for Na-ion battery, delivering 478 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 478 mAh g−1 with a high Coulombic efficiency of 88 % at the first cycle.

Original languageEnglish
Pages (from-to)5114-5120
Number of pages7
JournalAngewandte Chemie - International Edition
Issue number10
Publication statusPublished - Mar 1 2021


  • hard carbon
  • microporous materials
  • sodium ion batteries
  • sodium storage
  • template synthesis

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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