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

doi:10.1002/anie.202013951

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 journal › Article › peer-review

106 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	5114-5120
Number of pages	7
Journal	Angewandte Chemie - International Edition
Volume	60
Issue number	10
DOIs	https://doi.org/10.1002/anie.202013951
Publication status	Published - Mar 1 2021

Keywords

hard carbon
microporous materials
sodium ion batteries
sodium storage
template synthesis

ASJC Scopus subject areas

Catalysis
Chemistry(all)

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10.1002/anie.202013951

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abstract = "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.",

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

note = "Funding Information: The authors are grateful to Dr. Toshinari Ichihashi and Prof. Yasushi Idemoto at Tokyo University of Science (TUS) for TEM measurements, to Ms. Yoko Tanaka for experimental supports, and to Prof. Hidenori Otsuka and his laboratory members at TUS for experimental assistance. This work was partly supported by MEXT program ?Elements Strategy Initiative to Form Core Research Center? (Grant No. JPMXP0112101003) and by JST through CONCERT-Japan program of SICORP (Grant No. JPMJSC17C1). Publisher Copyright: {\textcopyright} 2020 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH",

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AU - Kubota, Kei

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AU - Youn, Yong

AU - Tateyama, Yoshitaka

AU - Ando, Hideka

AU - Gotoh, Kazuma

AU - Komaba, Shinichi

N1 - Funding Information: The authors are grateful to Dr. Toshinari Ichihashi and Prof. Yasushi Idemoto at Tokyo University of Science (TUS) for TEM measurements, to Ms. Yoko Tanaka for experimental supports, and to Prof. Hidenori Otsuka and his laboratory members at TUS for experimental assistance. This work was partly supported by MEXT program ?Elements Strategy Initiative to Form Core Research Center? (Grant No. JPMXP0112101003) and by JST through CONCERT-Japan program of SICORP (Grant No. JPMJSC17C1). Publisher Copyright: © 2020 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH

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

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