Key electrical performance evaluation of commercial graphene lithium-ion power batteries

This paper focuses on the key electrical performance evaluation of commercial graphene lithium-ion power batteries. The specific capacity, low-temperature discharge, high-temperature discharge, and internal resistance performance of graphene lithium-ion power batteries and ordinary lithium-ion power batteries are tested. Raman spectroscopy was used to qualitatively analyze graphene on the positive and negative electrodes of graphene lithium-ion power batteries. The measurement results show that compared with ordinary lithiumion power batteries, the energy density of the commercial graphene lithium-ion power battery tested in this paper is slightly higher, and there is no improvement in high and low temperature discharge performance. At low temperatures, the decrease of conductivity of graphene lithium-ion power batteries is lower than that of ordinary lithium-ion power batteries. The positive and negative electrodes of this commercial graphene lithium-ion power battery are not made of pure graphene material.