Microalgae are one of the promising feedstocks for biorefinery,contributing significantly to net-zero emissions through carbon capture and utilization.However,the disposal of microalgal byproducts from the manufacturi...Microalgae are one of the promising feedstocks for biorefinery,contributing significantly to net-zero emissions through carbon capture and utilization.However,the disposal of microalgal byproducts from the manufacturing process causes additional environmental pollution,thus,a new application strategy is required.In this study,the Tetraselmis suecica byproduct from the carotenoid extraction process was carbonized and converted into biochar.The converted biochar was proved to be nitrogen-doped biochar(NDB),up to 4.69%,with a specific surface area of 206.59m^(2)/g andwas used as an electrode for a supercapacitor.The NDB electrode(NDB-E)in half-cell showed a maximum specific capacitance of 191 F/g.In a full-cell test,the NDB-E exhibited a high energy density of 7.396 Wh/kg and a high-power density of 18,100 W/kg,and maintained specific capacity of 95.5%after charge and discharge of 10,000 cycles.In conclusion,our study demonstrated that the carotenoid-extracted microalgal byproducts are a useful resource for the supercapacitor production.This approach is the first to convert T.suecica into active materials for supercapacitors.展开更多
基金supported by the National Research Foundation of Korea(NRF)grant funded by Ministry of Science,ICT(Nos.2018M3A7B4070990,2020R1A2C2103137,2020R1F1A1076359,and 2022R1C1C2011696)the Education(Nos.2020R1A2C2103137 and 2020R1F1A1076359)Materials,Components&Equipment Research Program funded by the Gyeonggi Province。
文摘Microalgae are one of the promising feedstocks for biorefinery,contributing significantly to net-zero emissions through carbon capture and utilization.However,the disposal of microalgal byproducts from the manufacturing process causes additional environmental pollution,thus,a new application strategy is required.In this study,the Tetraselmis suecica byproduct from the carotenoid extraction process was carbonized and converted into biochar.The converted biochar was proved to be nitrogen-doped biochar(NDB),up to 4.69%,with a specific surface area of 206.59m^(2)/g andwas used as an electrode for a supercapacitor.The NDB electrode(NDB-E)in half-cell showed a maximum specific capacitance of 191 F/g.In a full-cell test,the NDB-E exhibited a high energy density of 7.396 Wh/kg and a high-power density of 18,100 W/kg,and maintained specific capacity of 95.5%after charge and discharge of 10,000 cycles.In conclusion,our study demonstrated that the carotenoid-extracted microalgal byproducts are a useful resource for the supercapacitor production.This approach is the first to convert T.suecica into active materials for supercapacitors.
