TY - JOUR
T1 - Electrochemical performance of carbon-encapsulated Fe3O4 nanoparticles in lithium-ion batteries
T2 - morphology and particle size effects
AU - Zhang, Yongguang
AU - Li, Yue
AU - Li, Haipeng
AU - Zhao, Yan
AU - Yin, Fuxing
AU - Bakenov, Zhumabay
PY - 2016/10/20
Y1 - 2016/10/20
N2 - Carbon-encapsulated Fe3O4 nanoparticles (Fe3O4@C) with varied microstructures were produced by controlling the relative concentrations of glucose and iron nitrate hydrate in a hydrothermal process, followed by heat treatment in Ar atmosphere. Three Fe3O4@C nanocomposites with different particle sizes (mean diameter 31.2, 45.1 and 55.3 nm) and Fe3O4 core size (26.8, 15.4 and 10.3 nm) were investigated for lithium storage performance. The Fe3O4@C nanoparticles with 15.4 nm Fe3O4 core exhibit excellent initial specific capacity (1215 mAh g−1) and significantly improved cycling performance (806 mAh g−1 after 100 cycles) and rate capability (573 mAh g−1 at current density of 1500 mA g−1), in comparison to the other Fe3O4@C composites. This superior performance is attributed to microstructural effects spawned from the pomegranate-like carbon coating architecture of the composite, the appropriate carbon content, and the optimized particle size of Fe3O4@C nanoparticles, which combined suppress the agglomeration and pulverization of Fe3O4 nanoparticle upon cycling and enhance the electrical conductivity of the Fe3O4 anode.
AB - Carbon-encapsulated Fe3O4 nanoparticles (Fe3O4@C) with varied microstructures were produced by controlling the relative concentrations of glucose and iron nitrate hydrate in a hydrothermal process, followed by heat treatment in Ar atmosphere. Three Fe3O4@C nanocomposites with different particle sizes (mean diameter 31.2, 45.1 and 55.3 nm) and Fe3O4 core size (26.8, 15.4 and 10.3 nm) were investigated for lithium storage performance. The Fe3O4@C nanoparticles with 15.4 nm Fe3O4 core exhibit excellent initial specific capacity (1215 mAh g−1) and significantly improved cycling performance (806 mAh g−1 after 100 cycles) and rate capability (573 mAh g−1 at current density of 1500 mA g−1), in comparison to the other Fe3O4@C composites. This superior performance is attributed to microstructural effects spawned from the pomegranate-like carbon coating architecture of the composite, the appropriate carbon content, and the optimized particle size of Fe3O4@C nanoparticles, which combined suppress the agglomeration and pulverization of Fe3O4 nanoparticle upon cycling and enhance the electrical conductivity of the Fe3O4 anode.
KW - Anode
KW - Carbon-encapsulated FeO nanoparticle (FeO@C) composite
KW - Lithium ion battery
KW - microstructure effects
KW - reactant concentration
UR - http://www.scopus.com/inward/record.url?scp=84987901081&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84987901081&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2016.09.054
DO - 10.1016/j.electacta.2016.09.054
M3 - Article
AN - SCOPUS:84987901081
VL - 216
SP - 475
EP - 483
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -