Oxygen‐Vacancy Abundant NiCo ₂ O ₄ on the N‐Doped Carbon Nanosheets as Anode for High Performance Lithium Ion Batteries

Abstract: In this work, the oxygen‐vacancy abundant NiCo 2 O 4 grown on the N‐doped carbon nanosheets are designed and fabricated through a facile procedure. The obtained special structure combined with the oxygen vacancies effectively enhance the contact area, keep the structural integrity as well as accelerate the electron and lithium ion transfer. As an anode for lithium ion batteries, the special architecture exhibits good cycle stability (1096 mAh g −1 after 100 cycles at current density of 200 mA g −1 ) and long cycle capability at high current rate (398 mAh g −1 after 500 cycles at 5000 mA g −1 ). The advantageous features by constructing oxygen‐vacancy abundant transition metal oxides with the conductive N‐doped carbon nanosheets may pave the way for improving the electrochemical performance.