TY - JOUR
T1 - Easy synthesis of multi-shelled ZnO hollow spheres and their conversion into hedgehog-like ZnO hollow spheres with superior rate performance for lithium ion batteries
AU - Wu, Guanglei
AU - Jia, Zirui
AU - Cheng, Yonghong
AU - Zhang, Hongxia
AU - Zhou, Xinfeng
AU - Wu, Hongjing
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/1/15
Y1 - 2019/1/15
N2 - Herein, uniform multi-shelled ZnO hollow spheres were synthesized, especially hedgehog-like and triple-shelled ZnO hollow spheres were synthesized for the first time by a simple hydrothermal method capable of controlling the number of internal multishells, which are achieved by controlling the calcination process. Used as anodes for lithium ion batteries, the hedgehog-like ZnO hollow spheres show excellent rate capacity, good cycling performance, and high initial specific capacity. A superior capacity, up to 109 mAh g −1 with minimal irreversible capacity (i.e., coulomb efficiency of 99.1%) after 100 cycles is achieved at a current rate of 100 mA g −1 , and a capacity of 98.8 mAh g −1 is obtained at a current rate of 1 A g −1 . However, a high discharge of 253.6 mA h g −1 for the hedgehog-like ZnO hollow spheres can still be achieved when the current rate is reduced back to 100 mA g −1 .
AB - Herein, uniform multi-shelled ZnO hollow spheres were synthesized, especially hedgehog-like and triple-shelled ZnO hollow spheres were synthesized for the first time by a simple hydrothermal method capable of controlling the number of internal multishells, which are achieved by controlling the calcination process. Used as anodes for lithium ion batteries, the hedgehog-like ZnO hollow spheres show excellent rate capacity, good cycling performance, and high initial specific capacity. A superior capacity, up to 109 mAh g −1 with minimal irreversible capacity (i.e., coulomb efficiency of 99.1%) after 100 cycles is achieved at a current rate of 100 mA g −1 , and a capacity of 98.8 mAh g −1 is obtained at a current rate of 1 A g −1 . However, a high discharge of 253.6 mA h g −1 for the hedgehog-like ZnO hollow spheres can still be achieved when the current rate is reduced back to 100 mA g −1 .
KW - Hedgehog-like ZnO
KW - Lithium ion batteries
KW - Nanostructure
KW - Synthesis
UR - http://www.scopus.com/inward/record.url?scp=85053390397&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2018.09.115
DO - 10.1016/j.apsusc.2018.09.115
M3 - 文章
AN - SCOPUS:85053390397
SN - 0169-4332
VL - 464
SP - 472
EP - 478
JO - Applied Surface Science
JF - Applied Surface Science
ER -