Low-carbon and energy-efficient strategy to convert CO2 into carbons with tunable graphitization degree as lithium storage materials toward ultra-long cycle life
Publication Name
Journal of Alloys and Compounds
Abstract
Converting greenhouse gas CO2 into high-performance energy storage materials is of great significance due to its capability of simultaneously addressing environmental issues and energy crises. However, great challenges still remain for the low-carbon and energy-efficient conversion of CO2. Herein, we report an energy-efficient and time-saving strategy for converting CO2 into carbon materials by the reaction of CO2 with Mg(AlH4)2 at about 126–136 ℃ in seconds. The chemical reaction of CO2 with Mg(AlH4)2 is reported for the first time. Importantly, the graphitization degree and pore structure of as-synthesized carbon materials are found to be regulated by CO2 pressure. As a lithium storage application, the graphitization degree-dependent electrochemical performance is revealed for the carbon anodes. The highly graphitized carbon prepared at high CO2 pressure exhibits high capacity and ultra-long cycle life, delivering a high reversible capacity of 487 mAh g−1 at 1.0 A g−1 after 3500 cycles. This study develops a green and low-temperature strategy to synthesize CO2-derived carbon materials with tunable graphitization degree for energy storage.
Open Access Status
This publication is not available as open access
Volume
968
Article Number
172005
Funding Number
52072342
Funding Sponsor
National Natural Science Foundation of China