Abstract
Nanostructured metal selenides with a variety of morphologies are crucial for fabricating porous, hollow metal-oxide nanomaterials by nanoscale Kirkendall diffusion. Herein, SnSe-SnO 2 composite powders and SnSe nanospheres were synthesized via one-pot spray pyrolysis by optimizing the concentration of the Se precursor in the spray solution; these were then used to fabricate sunflower-like SnO 2 and hollow SnO 2 nanospheres, respectively, via nanoscale Kirkendall diffusion. Post-treatment of the SnSe-decorated SnO 2 under air produced sunflower-like SnO 2 , in which ray and disk florets consisting of hollow nanoplates and dense nanospheres, respectively, were present. The mean diameter of the homogeneous hollow SnO 2 nanospheres was 150 nm. The hollow morphology shortens the diffusion length, increasing the contact area between the electrolyte and voids and buffering large volume changes during repeated cycling. As anode materials for lithium-ion batteries, the hollow SnO 2 nanospheres showed excellent cycling and rate performances. The discharge capacity of the hollow SnO 2 nanospheres, after 500 cycles from 0.001 V to 3.0 V, was 1043 mA h g -1 , at a current density of 3.0 A g -1 . The hollow SnO 2 nanospheres showed a high reversible capacity of 638 mA h g -1 , even at current density as high as 10 A g -1 .
| Original language | English |
|---|---|
| Pages (from-to) | 13531-13538 |
| Number of pages | 8 |
| Journal | Nanoscale |
| Volume | 10 |
| Issue number | 28 |
| DOIs | |
| Publication status | Published - 2018 Jul 28 |
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ASJC Scopus subject areas
- Materials Science(all)
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Lithium-ion storage performances of sunflower-like and nano-sized hollow SnO 2 spheres by spray pyrolysis and the nanoscale Kirkendall effect . / Park, Gi Dae; Kim, Jong Hwa; Kang, Yun Chan.
In: Nanoscale, Vol. 10, No. 28, 28.07.2018, p. 13531-13538.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Lithium-ion storage performances of sunflower-like and nano-sized hollow SnO 2 spheres by spray pyrolysis and the nanoscale Kirkendall effect
AU - Park, Gi Dae
AU - Kim, Jong Hwa
AU - Kang, Yun Chan
PY - 2018/7/28
Y1 - 2018/7/28
N2 - Nanostructured metal selenides with a variety of morphologies are crucial for fabricating porous, hollow metal-oxide nanomaterials by nanoscale Kirkendall diffusion. Herein, SnSe-SnO 2 composite powders and SnSe nanospheres were synthesized via one-pot spray pyrolysis by optimizing the concentration of the Se precursor in the spray solution; these were then used to fabricate sunflower-like SnO 2 and hollow SnO 2 nanospheres, respectively, via nanoscale Kirkendall diffusion. Post-treatment of the SnSe-decorated SnO 2 under air produced sunflower-like SnO 2 , in which ray and disk florets consisting of hollow nanoplates and dense nanospheres, respectively, were present. The mean diameter of the homogeneous hollow SnO 2 nanospheres was 150 nm. The hollow morphology shortens the diffusion length, increasing the contact area between the electrolyte and voids and buffering large volume changes during repeated cycling. As anode materials for lithium-ion batteries, the hollow SnO 2 nanospheres showed excellent cycling and rate performances. The discharge capacity of the hollow SnO 2 nanospheres, after 500 cycles from 0.001 V to 3.0 V, was 1043 mA h g -1 , at a current density of 3.0 A g -1 . The hollow SnO 2 nanospheres showed a high reversible capacity of 638 mA h g -1 , even at current density as high as 10 A g -1 .
AB - Nanostructured metal selenides with a variety of morphologies are crucial for fabricating porous, hollow metal-oxide nanomaterials by nanoscale Kirkendall diffusion. Herein, SnSe-SnO 2 composite powders and SnSe nanospheres were synthesized via one-pot spray pyrolysis by optimizing the concentration of the Se precursor in the spray solution; these were then used to fabricate sunflower-like SnO 2 and hollow SnO 2 nanospheres, respectively, via nanoscale Kirkendall diffusion. Post-treatment of the SnSe-decorated SnO 2 under air produced sunflower-like SnO 2 , in which ray and disk florets consisting of hollow nanoplates and dense nanospheres, respectively, were present. The mean diameter of the homogeneous hollow SnO 2 nanospheres was 150 nm. The hollow morphology shortens the diffusion length, increasing the contact area between the electrolyte and voids and buffering large volume changes during repeated cycling. As anode materials for lithium-ion batteries, the hollow SnO 2 nanospheres showed excellent cycling and rate performances. The discharge capacity of the hollow SnO 2 nanospheres, after 500 cycles from 0.001 V to 3.0 V, was 1043 mA h g -1 , at a current density of 3.0 A g -1 . The hollow SnO 2 nanospheres showed a high reversible capacity of 638 mA h g -1 , even at current density as high as 10 A g -1 .
UR - http://www.scopus.com/inward/record.url?scp=85050305999&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85050305999&partnerID=8YFLogxK
U2 - 10.1039/c8nr03886d
DO - 10.1039/c8nr03886d
M3 - Article
AN - SCOPUS:85050305999
VL - 10
SP - 13531
EP - 13538
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 28
ER -