首页|Pyrolytic gas exfoliation and template mediation inducing defective mesoporous carbon network from industrial lignin for advanced lithium-ion storage
Pyrolytic gas exfoliation and template mediation inducing defective mesoporous carbon network from industrial lignin for advanced lithium-ion storage
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NSTL
Elsevier
? 2022Enzymatic hydrolysis lignin (EHL) from the biorefinery industry has been considered an ideal carbon source to prepare high-performance carbonaceous electrodes due to its high aromaticity and abundance. However, the severe agglomeration of the directly carbonized EHL results in insufficient lithium storage sites and inferior transfer kinetics. Herein, a delicate strategy of pyrolytic gas exfoliation and template mediation through ZnCO3 and ZnC2O4 decomposition was developed to engineer the microstructure of EHL-derived carbonaceous material (ECM) at 650 °C for robust lithium storage. The mesoporous ECM with an interconnected grape-like (200 nm) network is prepared by single CO2 exfoliation and ZnO templating. Surface micropores are engineered by temporary ZnO activation at 500–650 °C. The blocky ECM with coexisting micro/mesopores is prepared by dual CO/CO2 exfoliation and ZnO templating. The tempestuous release of CO2 produces deep micropores. The developed mesoporous structure boosts fast Li-ion transportation and accessibility for defects. In addition, the nanostructured grape-like (200 nm) network exposes active surface defects and shortens the charge-diffusion distance. Thus, the mesoporous ECM displays a robust capacity (534.1 mAh·g?1 at 0.2 A·g?1), superior rate capability (323.4 mAh·g?1 at 1 A·g?1) and excellent cycling stability. The blocky ECM with coexisting micro/mesopores shows better lithium storage performance than the microporous blocky ECM prepared by ZnCl2 activation.
Wang C.、Yang D.、Zhu Y.、Yan M.、Zhang W.、Qin Y.、Qiu X.、Xi Y.
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School of Chemistry and Chemical Engineering Guangdong Provincial Engineering Research Center for Green Fine Chemicals South China University of Technology
School of Chemical Engineering and Light Industry Guangdong University of Technology
State Key Laboratory of Biobased Material and Green Papermaking Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education Qilu University of Technology (Shandong Academy of Sciences)
NSTL
Elsevier
