TY - JOUR
T1 - Uniquely structured iron hydroxide-carbon nanospheres with yolk-shell and hollow structures and their excellent lithium-ion storage performances
AU - Kim, Ju Hyeong
AU - Park, Gi Dae
AU - Yang, Su Hyun
AU - Hong, Jeong Hoo
AU - Kim, Jin Koo
AU - Kang, Yun Chan
N1 - Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1A2C2088047 and 2020R1A4A2002854).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/3/15
Y1 - 2021/3/15
N2 - Rationally designed transition metal compound-carbon composites have been widely studied as anode materials for high-efficiency alkali metal-ion batteries. In this study, iron hydroxide-carbon composite nanospheres with yolk-shell and hollow structures were successfully synthesized by a facile in-situ precipitation method using NaOH solution to confirm the effects of morphological control as well as compositing with carbon material on the electrochemical properties for lithium-ion storage. To prepare the yolk-shell and hollow structured iron nitrate-carbon composite precursor nanospheres, “vacuum heat-treatment” and “drop-and-dry” processes were employed, respectively. The graphitic carbon matrix and internal void space provided electronic conductivity and structural durability, respectively, during the repeated discharge and charge processes. Correspondingly, when applied as anodes for lithium-ion batteries, the yolk-shell and hollow structured iron hydroxide-carbon nanospheres delivered extraordinary rate performances and long-term cycle stabilities, revealing reversible discharge capacities of 504 and 442 mA h g−1 for 400 cycles at a current density of 5 A g−1, respectively. In addition, based on the results of various in-situ and ex-situ analyses, the reversible conversion reaction of iron hydroxide with lithium ions could be approximated by the following reaction: Fe(OH)3 + 3Li+ + 3e− ↔ Fe + 3Li(OH).
AB - Rationally designed transition metal compound-carbon composites have been widely studied as anode materials for high-efficiency alkali metal-ion batteries. In this study, iron hydroxide-carbon composite nanospheres with yolk-shell and hollow structures were successfully synthesized by a facile in-situ precipitation method using NaOH solution to confirm the effects of morphological control as well as compositing with carbon material on the electrochemical properties for lithium-ion storage. To prepare the yolk-shell and hollow structured iron nitrate-carbon composite precursor nanospheres, “vacuum heat-treatment” and “drop-and-dry” processes were employed, respectively. The graphitic carbon matrix and internal void space provided electronic conductivity and structural durability, respectively, during the repeated discharge and charge processes. Correspondingly, when applied as anodes for lithium-ion batteries, the yolk-shell and hollow structured iron hydroxide-carbon nanospheres delivered extraordinary rate performances and long-term cycle stabilities, revealing reversible discharge capacities of 504 and 442 mA h g−1 for 400 cycles at a current density of 5 A g−1, respectively. In addition, based on the results of various in-situ and ex-situ analyses, the reversible conversion reaction of iron hydroxide with lithium ions could be approximated by the following reaction: Fe(OH)3 + 3Li+ + 3e− ↔ Fe + 3Li(OH).
KW - Anode materials
KW - Hollow carbon nanospheres
KW - In-situ precipitation
KW - Iron hydroxide
KW - Lithium-ion batteries
UR - http://www.scopus.com/inward/record.url?scp=85097650091&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2020.148637
DO - 10.1016/j.apsusc.2020.148637
M3 - Article
AN - SCOPUS:85097650091
SN - 0169-4332
VL - 542
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 148637
ER -