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The instability of anode materials during cycling has been greatly limiting the lifetime of aqueous rechargeable lithium batteries (ARLBs). Here, to tackle this issue, mesoporous LiTi 2 (PO 4 ) 3 @C composites with a pore size of 4 nm and a large BET surface area of 165 m 2  g −1  have been synthesized by a novel two-step approach. The ARLB with this type of LiTi 2 (PO 4 ) 3 @C anode, commercial LiMn 2 O 4  cathode and 2 M Li 2 (SO 4 ) aqueous solution (oxygen was removed) exhibited superior cycling stability (a capacity retention of 88.9% after 1200 cycles at 150 mA g −1  and 82.7% over 5500 cycles at 750 mA g −1 ) and excellent rate capability (discharge capacities of 121, 110, 90, and 80 mAh g −1  based on the mass of LiTi 2 (PO 4 ) 3  at 30, 150, 1500, and 3000 mA g −1 , respectively). As verified, the mesoporous structure, large surface area and high-quality carbon coating layer of the LiTi 2 (PO 4 ) 3 @C composite contribute to the breakthrough in achieving excellent electrochemical properties for ARLB.

Long-lived Aqueous Rechargeable Lithium Batteries Using Mesoporous LiTi2(PO4)3@C Anode