High‐Performance Li‐CO₂ Battery Based on Carbon‐Free Porous Ru@QNFs Cathode

Abstract

Lithium‐carbon dioxide (Li‐CO2) batteries have attracted much attention due to their high theoretical energy density. However, due to the existance of lithium carbonate and amorphous carbon in the discharge products that are difficult to decompose, the battery shows low coulombic efficiency and poor cycle performance. Here, by adjusting the adsorption of carbon dioxide (CO2) on ruthenium (Ru) catalysts surface, this work reports an ultralow charge overpotential and long cycle life Li‐CO2 battery that consists of typical lithium metal, ternary molten salt electrolyte (TMSE), and Ru‐based cathode. Experimental results show that the Ru catalysts deposited on quartz nanofiber (QF) can suppress the four‐electron conversion of CO2 to lithium carbonate (Li2CO3). As a result, the battery shows a long‐cycle‐life of over 457 cycles at 1.0 A g−1 with a limited capacity of 500 mAh g−1Ru. Remarkably, a recorded low discharge potential of ≈3.0 V has been achieved after 35 cycles at 0.5 A g−1, with a charge potential retention of over 99%. Moreover, the battery can operate over 25 A g−1 and recover 96% potential. This battery technology paves the way for designing high‐performance rechargeable Li‐CO2 batteries with carbon neutrality.

A Li–O2/CO2 battery based on bio-inspired engineering of the Bi2S3/PVP cathode

“…The development of low-cost, high-energy, long-lived energy storage systems holds promise for the widespread use of renewable energy in power grids and cheap electric vehicles. 11–15 As the next generation of high specific energy electrochemical energy storage systems, lithium–air batteries have been widely studied in recent decades.…”

Synergistic Effect of CO2 in Accelerating the Galvanic Corrosion of Lithium/Sodium Anodes in Alkali Metal–Carbon Dioxide Batteries

“…Rechargeable alkali metal–carbon dioxide batteries, such as the Li/Na/K–CO 2 batteries, are expected as promising candidates for the next-generation electrochemical energy storage systems due to their exceptional dual functions of sustainable energy storage capability and efficient CO 2 recyclability. − During the discharging process of the alkali metal–CO 2 battery, the cathode is able to capture and reduce CO 2 to other chemicals by using the incoming electrons released from the metal anode . During the charging process, the battery operates in the reverse process in which CO 2 is released at the cathode, and the metal is deposited at the anode .…”