One-step solution combustion synthesis of CuO/Cu2O/C anode for long cycle life Li-ion batteries

By Xu, Chunxiao; Manukyan, Khachatur V.; Adams, Ryan A.; Pol, Vilas G.; Chen, Pengwan; Varma, Arvind
Published in Carbon 2019

Abstract

Using glucose (C6H12O6) and copper nitrate (Cu(NO3)2) as fuel and oxidizing agent respectively, CuO/Cu2O/C composites with different carbon contents were successfully prepared by the solution combustion synthesis method. The as-obtained CuO/Cu2O nanoparticles exhibited uniform spherical morphology and, by changing the amount of fuel and ambient temperature, carbon was synthesized in-situ with content ranging from 3 to 36 wt%. The electrochemical performance of the CuO/Cu2O/C anode in Li-ion batteries was investigated systematically, demonstrating >400 mAh g?1 capacity at 20 mA g?1 current density and highly stable cycling performance with capacity 260 mAh g?1 after 600 cycles at current density 0.2 A g?1. This performance is attributed to the synergistic effect of anodes porous structure, conducting carbon coating and two-component CuO/Cu2O structure. Owing to the inexpensive and facile solution combustion synthesis method and the resulting high electrochemical performance, the CuO/Cu2O/Carbon composite is a promising anode material for application in Li-ion batteries.

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