1 research outputs found
Unleashing the Power and Energy of LiFePO<sub>4</sub>‑Based Redox Flow Lithium Battery with a Bifunctional Redox Mediator
Redox
flow batteries, despite great operation flexibility and scalability
for large-scale energy storage, suffer from low energy density and
relatively high cost as compared to the state-of-the-art Li-ion batteries.
Here we report a redox flow lithium battery, which operates via the
redox targeting reactions of LiFePO<sub>4</sub> with a bifunctional
redox mediator, 2,3,5,6-tetramethyl-<i>p</i>-phenylenediamine,
and presents superb energy density as the Li-ion battery and system
flexibility as the redox flow battery. The battery has achieved a
tank energy density as high as 1023 Wh/L, power density of 61 mW/cm<sup>2</sup>, and voltage efficiency of 91%. Operando X-ray absorption
near-edge structure measurements were conducted to monitor the evolution
of LiFePO<sub>4</sub>, which provides insightful information on the
redox targeting process, critical to the device operation and optimization