| 초록 |
Highly porous nickel chromite hollow spheres are fabricated by a hydrothermal reaction of a composite solution containing nickel, chromium ions, and polyethyl glycol for Ni-Cr/carbon microspheres, and then the subsequent thermal treatment leads to hollow microspheres caused by carbon decomposition. Nickel chromite hollow microspheres with mesoporous shell and macroporous hollow void provide remarkable rate capability and excellent capacity retention by suppressing volume expansion. Nickel chromite hollow microspheres calcined at 450 oC retain the morphology enhancing mass/charge transfer, and structural integrity effectively preventing the electrochemical decay. |
