Li-O₂ batteries gained enormous interest in last few years for their attractive theoretical energy density compared to state-of-the-art Li-ion batteries. However, insulating discharge product, Li₂O₂ causes the large over potentials upon charge resulting in a lower energy round trip efficiencies. Using an efficient bifunctional catalyst can reduce the overpotentials of oxygen reduction and evolution reactions in Li-O₂ battery. Herein, we report poly anion (tungstate) based new breathing electrode with low energy surface planes, synthesized by simple hydrothermal route. Co_0.5Mn_0.5WO₄ has demonstrated great ability to catalyze both the OER and oxygen reduction reaction (ORR) with a combined bifunctional overpotential of 0.89 V in alkaline conditions. In line with this, cobalt manganese tungstate catalyst showed excellent electrochemical performance as a cathode in Li-O₂ battery, with good rate capability and long cycle life (100 cycles at limited capacity of 1000 mAh/g). X-ray diffraction and FESEM techniques are used to confirm the reversible formation of Li₂O_x during battery cycling in 1M LiTFSi-TEGDME electrolyte. Replacing an optimum amount of Co by Mn in CoWO₄, tunes the electronic structure, enhances the bifunctional activity for lithium oxide formation-decomposition. Improved cyclability is attributed to enhanced solubility of discharged products on low energy surface planes of nano sized Co_0.5Mn_0.5WO₄.