Abstract
Lithium-ion batteries (LIBs) have attracted considerable attention as environment friendly power sources for portable electronic devices. Although graphite (LiC6: 372 mAh g-1) has been used as the anode material for Li-ion batteries, the search for high rate anode materials has been actively pursued to meet the fast-growing requirements of high-power Li-ion batteries. As a promising anode candidate, TiNb2O7 (TNO) anode material with a nanoporous nature was prepared by a facile sol-gel approach. To satisfy the requirements of practical application, the hundred-gram scale synthesis of carbon coated TNO (TNO@C) have been achieved with low-cost reactants. The full cells based on high loading TNO@C anode (>13 mg/cm2) and matched LiNi0.6Mn0.2Co0.2O2 (NMC622, D50=10µm, Targray) cathode were evaluated for the 10 mins fast-charging application, delivering a high energy density of 142.8 Wh/kg (357 Wh/L) and a good energy density retention over 80% after 500 cycles.
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