Abstract
Se-impregnated hollow carbon (C-Se) microspheres were studied as cathode materials for Li-Se batteries. Hollow carbon microspheres containing micro- and mesopores were prepared by SnO2 leaching in the core-shell-structured SnO2@C composite microspheres prepared by one-pot spray pyrolysis. The mean size of the empty cores and the mean shell thickness of the hollow carbon microspheres were 490 and 90 nm, respectively. Metallic Se was impregnated into the hollow carbon microspheres by vapor inclusion. The Se content in the C-Se microspheres was measured by thermogravimetric analysis (TGA) to be 59.5 wt%. The discharge capacities of the C-Se microspheres in the 2nd and 1,000th cycles at a constant current density of 0.5 A g−1 were 603 and 525 mA h g−1, respectively, and the capacity retention measured from the 2nd cycle was 87%. The capacity retention of the C-Se microspheres measured from the 10th cycle was almost 100%. The structural stability of the C-Se composite microspheres during repeated Li-insertion and desertion process resulted in excellent Li-ion storage performance.
| Original language | English |
|---|---|
| Pages (from-to) | 198-206 |
| Number of pages | 9 |
| Journal | Carbon |
| Volume | 111 |
| DOIs | |
| Publication status | Published - 2017 Jan 1 |
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ASJC Scopus subject areas
- Chemistry(all)
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Selenium-impregnated hollow carbon microspheres as efficient cathode materials for lithium-selenium batteries. / Hong, Young Jun; Kang, Yun Chan.
In: Carbon, Vol. 111, 01.01.2017, p. 198-206.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Selenium-impregnated hollow carbon microspheres as efficient cathode materials for lithium-selenium batteries
AU - Hong, Young Jun
AU - Kang, Yun Chan
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Se-impregnated hollow carbon (C-Se) microspheres were studied as cathode materials for Li-Se batteries. Hollow carbon microspheres containing micro- and mesopores were prepared by SnO2 leaching in the core-shell-structured SnO2@C composite microspheres prepared by one-pot spray pyrolysis. The mean size of the empty cores and the mean shell thickness of the hollow carbon microspheres were 490 and 90 nm, respectively. Metallic Se was impregnated into the hollow carbon microspheres by vapor inclusion. The Se content in the C-Se microspheres was measured by thermogravimetric analysis (TGA) to be 59.5 wt%. The discharge capacities of the C-Se microspheres in the 2nd and 1,000th cycles at a constant current density of 0.5 A g−1 were 603 and 525 mA h g−1, respectively, and the capacity retention measured from the 2nd cycle was 87%. The capacity retention of the C-Se microspheres measured from the 10th cycle was almost 100%. The structural stability of the C-Se composite microspheres during repeated Li-insertion and desertion process resulted in excellent Li-ion storage performance.
AB - Se-impregnated hollow carbon (C-Se) microspheres were studied as cathode materials for Li-Se batteries. Hollow carbon microspheres containing micro- and mesopores were prepared by SnO2 leaching in the core-shell-structured SnO2@C composite microspheres prepared by one-pot spray pyrolysis. The mean size of the empty cores and the mean shell thickness of the hollow carbon microspheres were 490 and 90 nm, respectively. Metallic Se was impregnated into the hollow carbon microspheres by vapor inclusion. The Se content in the C-Se microspheres was measured by thermogravimetric analysis (TGA) to be 59.5 wt%. The discharge capacities of the C-Se microspheres in the 2nd and 1,000th cycles at a constant current density of 0.5 A g−1 were 603 and 525 mA h g−1, respectively, and the capacity retention measured from the 2nd cycle was 87%. The capacity retention of the C-Se microspheres measured from the 10th cycle was almost 100%. The structural stability of the C-Se composite microspheres during repeated Li-insertion and desertion process resulted in excellent Li-ion storage performance.
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UR - http://www.scopus.com/inward/citedby.url?scp=84989321785&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2016.09.069
DO - 10.1016/j.carbon.2016.09.069
M3 - Article
AN - SCOPUS:84989321785
VL - 111
SP - 198
EP - 206
JO - Carbon
JF - Carbon
SN - 0008-6223
ER -