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Electrodes consisting of LiNi_1/3Co_1/3Mn_1/3O₂, aluminum foil, conductive additives, and polyvinylidene fluoride were coated with a thin graphene oxide layer via a simple screen-printing method. The cycle performance and rate capability were tested at a cut-off voltage of 4.3 V. Results show that the capacity deceases whereas the polarization increases during the galvanostatic charge-discharge tests for primary electrodes. For the graphene-oxide-modified electrodes, the capacity decrement reduces and polarization increment rate evidently slows down. As a result, the cycle stability and rate capability are improved because the graphene oxide coating suppresses the side reactions between the LiNi_1/3Co_1/3Mn_1/3O₂ electrodes and electrolyte. The research provides an ecofriendly and highly effective strategy to improve the performance of LiNi_1/3Co_1/3Mn_1/3O₂ electrodes.