Tunable Electronic Properties of Free-standing Fe-doped GaN Nanowires as High-capacity Anode of Lithium-ion Batteries

摘要: Abstract As an electrode in lithium-ion batteries (LIBs), gallium nitride (GaN) suffers from inferior conductivity and unsatisfied capacity performance. Although nanostructure designing carbon coating strategies have been adopted to address this concern, improved Li+ storage performance remains highly desirable. In work, Fe doping strategy was as-prepared GaN via chemical vapor deposition. enhanced electrical charge-transfer efficiency. Results showed that the covalent of into nanowires provided abundant nanochannels realized efficient ionic transfer reduced diffusion barrier. These covalently doped nanowire arrays exhibited capacities up 612.3 mAh g−1 at 0.1 A after 200 cycles 338.2 5.0 500 cycles. Density functional theory calculations confirmed crystal band structures were tuned intensively enhance efficiency The electron density a significant reference for rational construction beyond.