Abstract
Simple fabrication of CoMoO 4 and CoMoO 4 -C microspheres containing several tens of vacant nanorooms by spray pyrolysis is described. The successful introduction of internal nanorooms was achieved by the phase segregation of dextrin applied in the spray solution as a deformable template. These uniquely structured microspheres enabled the facile penetration of liquid electrolyte and effectively alleviated stress resulting from the huge volume change that occurs during the cycling of Li-ion storage devices. The initial discharge capacity of the CoMoO 4 microspheres with vacant nanorooms was 1235 mA h g −1 at a current density of 1 A g −1 , and its capacity retention after 100 cycles measured from the second cycle was 99%. The CoMoO 4 microspheres with vacant nanorooms showed superior cycling and rate performances compared to that of the CoMoO 4 microspheres with dense structures. The vacant nanorooms of the CoMoO 4 -C microspheres were well maintained after selenization to form CoSe 2 -MoSe 2 /C composite microspheres. The CoSe 2 -MoSe 2 /C composite microspheres with vacant nanorooms showed superior Na-ion storage performances compared to that of the carbon-free CoSe 2 -MoSe 2 microspheres with dense structures.
| Original language | English |
|---|---|
| Pages (from-to) | 665-677 |
| Number of pages | 13 |
| Journal | Chemical Engineering Journal |
| Volume | 333 |
| DOIs | |
| Publication status | Published - 2018 Feb 1 |
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Keywords
- Carbon composite
- Lithium ion batteries
- Metal chalcogenide
- Nanostructured material
- Sodium ion batteries
- Spray pyrolysis
ASJC Scopus subject areas
- Chemistry(all)
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering
Cite this
Electrochemical properties of multicomponent oxide and selenide microspheres containing Co and Mo components with several tens of vacant nanorooms synthesized by spray pyrolysis. / Kim, Jin Koo; Kim, Jong Hwa; Kang, Yun Chan.
In: Chemical Engineering Journal, Vol. 333, 01.02.2018, p. 665-677.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical properties of multicomponent oxide and selenide microspheres containing Co and Mo components with several tens of vacant nanorooms synthesized by spray pyrolysis
AU - Kim, Jin Koo
AU - Kim, Jong Hwa
AU - Kang, Yun Chan
PY - 2018/2/1
Y1 - 2018/2/1
N2 - Simple fabrication of CoMoO 4 and CoMoO 4 -C microspheres containing several tens of vacant nanorooms by spray pyrolysis is described. The successful introduction of internal nanorooms was achieved by the phase segregation of dextrin applied in the spray solution as a deformable template. These uniquely structured microspheres enabled the facile penetration of liquid electrolyte and effectively alleviated stress resulting from the huge volume change that occurs during the cycling of Li-ion storage devices. The initial discharge capacity of the CoMoO 4 microspheres with vacant nanorooms was 1235 mA h g −1 at a current density of 1 A g −1 , and its capacity retention after 100 cycles measured from the second cycle was 99%. The CoMoO 4 microspheres with vacant nanorooms showed superior cycling and rate performances compared to that of the CoMoO 4 microspheres with dense structures. The vacant nanorooms of the CoMoO 4 -C microspheres were well maintained after selenization to form CoSe 2 -MoSe 2 /C composite microspheres. The CoSe 2 -MoSe 2 /C composite microspheres with vacant nanorooms showed superior Na-ion storage performances compared to that of the carbon-free CoSe 2 -MoSe 2 microspheres with dense structures.
AB - Simple fabrication of CoMoO 4 and CoMoO 4 -C microspheres containing several tens of vacant nanorooms by spray pyrolysis is described. The successful introduction of internal nanorooms was achieved by the phase segregation of dextrin applied in the spray solution as a deformable template. These uniquely structured microspheres enabled the facile penetration of liquid electrolyte and effectively alleviated stress resulting from the huge volume change that occurs during the cycling of Li-ion storage devices. The initial discharge capacity of the CoMoO 4 microspheres with vacant nanorooms was 1235 mA h g −1 at a current density of 1 A g −1 , and its capacity retention after 100 cycles measured from the second cycle was 99%. The CoMoO 4 microspheres with vacant nanorooms showed superior cycling and rate performances compared to that of the CoMoO 4 microspheres with dense structures. The vacant nanorooms of the CoMoO 4 -C microspheres were well maintained after selenization to form CoSe 2 -MoSe 2 /C composite microspheres. The CoSe 2 -MoSe 2 /C composite microspheres with vacant nanorooms showed superior Na-ion storage performances compared to that of the carbon-free CoSe 2 -MoSe 2 microspheres with dense structures.
KW - Carbon composite
KW - Lithium ion batteries
KW - Metal chalcogenide
KW - Nanostructured material
KW - Sodium ion batteries
KW - Spray pyrolysis
UR - http://www.scopus.com/inward/record.url?scp=85041897874&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85041897874&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2017.09.169
DO - 10.1016/j.cej.2017.09.169
M3 - Article
AN - SCOPUS:85041897874
VL - 333
SP - 665
EP - 677
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -