An aqueous rechargeable lithium battery of excellent rate capability based on a nanocomposite of MoO₃ coated with PPy and LiMn₂O ₄

A nanocomposite of MoO₃ coated with polypyrrole (PPy) was prepared as an anode material for ARLBs. When nanochain LiMn₂O ₄ is used as the cathode, the ARLB can deliver an energy density of 45 Wh kg^-1 at 350 W kg^-1 and even maintain 38 Wh kg ^-1 at 6 kW kg^-1 in 0.5 M Li₂SO₄ aqueous electrolyte, corresponding to an good rate capability. In addition, its cycling behavior is greatly improved compared with the virginal MoO₃. Our findings provide valuable clues to improve the comprehensive performance of ARLBs for practical application. This unique performance demonstrates that this battery will be of great promise as a power source for large power devices such as power loading and the storage of solar and wind energies.