Preparation And Electrochemical Properties Of Phenolic Resin / Graphene Composite Anode Materials

Phenol resin and graphene composites were prepared using the method of spray drying and simple heat treatment. On this basis, different contents of GO composites were synthetic. The morphological structural and electrochemical properties were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy (Raman), Brunauer-Emmett-Teller (BET), constant current charge discharge test, rate performance and cyclic voltammetry measurements.The results show that the phenol resin and graphene composites were prepared successfully with different heat treatment temperature. The composite prepared by PF and GO, with a GO content of 10 wt% and 30 wt%, which was denoted as PF/G-10 and PF/G-30. The PF/G were obtained by heating the materials under argon and hydrogen flow for 3h at 800℃,1000℃ and 1250℃, respectively. The PF/G-10 and PF/G-30 in LIB has the highest discharge at a temperature of 1250℃, which is 266 mAh g-1 and 303 mAh g-1 at a current density of 20 mA g-1. After 200 cycles, the capacity retention of PF/G composite particles is almost 98%, further confirming the predominance of this new material for lithium storage.Because PF/G treated at 1250℃ has the highest rate performance, under the temperature we changed the GO content of phenolic resin/graphene composites and studied the electrochemical properties of the anode materials. The reversible capacity of PF/G composites in LIB is much higher than the pure PF and RGO with typical galvanostatic charge/discharge curves. The rate capability performance of PF/G-30 is much better than other samples, a reversible capacity of 280 mAh g-1 at 20 mA g-1 after charging and discharging at 1 A g-1.