Abstract
Highly dispersed ZnO nanoparticles were prepared by a versatile and scalable sol-gel synthetic technique. High-resolution transmission electronic microscopy (HRTEM) showed that the as-prepared ZnO nanoparticles are spherical in shape and exhibit a uniform particle size distribution with the average size of about 7 nm. Electrochemical properties of the resulting ZnO were evaluated by galvanostatic discharge/charge cycling as anode for lithium-ion battery. A reversible capacity of 1652 mAh g−1 was delivered at the initial cycle and a capacity of 318 mAh g−1 was remained after 100 cycles. Furthermore, the system could deliver a reversible capacity of 229 mAh g−1 even at a high current density of 1.5 C. This outstanding electrochemical performance could be attributed to the nano-sized features of highly dispersed ZnO particles allowing for the better accommodation of large strains caused by particle expansion/shrinkage along with providing shorter diffusion paths for Li+ ions upon insertion/deinsertion.
Original language | English |
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Pages (from-to) | 1387-1393 |
Number of pages | 7 |
Journal | Ionics |
Volume | 22 |
Issue number | 8 |
DOIs | |
Publication status | Published - Aug 1 2016 |
Externally published | Yes |
Keywords
- Anode
- Highly dispersed ZnO nanoparticles
- Lithium ion battery
- Sol-gel
ASJC Scopus subject areas
- Chemical Engineering(all)
- Materials Science(all)
- Engineering(all)
- Physics and Astronomy(all)