A novel wet method of (NH4)(3)AlF6 coating was explored to enhance the electrochemical performance of Mn-based solid-solution cathode material 0.5Li(2)MnO(3)center dot 0.5LiNi(1/3)Co(1/3)Mn(1/3)O(2). The X-ray powder diffraction patterns show that the coating material is pure-phase (NH4)(3)AlF6 and both pristine and coated samples can be indexed to hexagonal alpha w-NaFeO2 layered structure with space group of R-3 m. The field-emission scanning electron microscope images and the energy dispersive X-ray spectroscopy show that (NH4)(3)AlF6 is successfully coated on the surface of active particle. The (NH4)(3)AlF6 coated electrodes exhibit improved electrochemical performance, for instance, the initial charge-discharge efficiency was promoted by 5% (NR4)(3)AlF6 coating, the 1 wt.% and 3 wt.% coated electrodes deliver elevated cycling ability which is ascribed to the lower resistance between electrode and electrolyte as indicated by AC impedance measurement at different cycles. In addition, the coated-electrodes also give enhanced rate capability particularly for! wt.% NAF-coated electrode performing surprising capacity of 143.4 mAhg(-1) at 5 C higher than that of 109.4 mAh g(-1) for pristine electrode. Furthermore, the 1 wt.% NAF-coated electrode also shows improved cycle and rate performance at 55 degrees C. 2013 Elsevier Ltd. All rights reserved.