Comparison of three different industrial lignin-based porous carbon electrodes for electrochemical applications
Source abstract
Abstract
Abstract In order to fully utilize industrial lignin, a comparative study was conducted on the properties of porous carbon electrodes prepared by activating different industrial lignin as precursors. The results revealed that carbon electrodes prepared with sodium lignosulfonate (CM-S) exhibited superior specific surface area (SSA) (1,593.5 m2 g−1) and pore volume (PV) (1.03 cm3 g−1) due to the largest relative molecular mass (Mn = 4,539, Mw = 7,290), which is greater than that prepared with alkali lignin (CM-A) and kraft lignin (CM-K), and displayed a well-developed micro-mesoporous macropore hierarchy which was feasible for the efficiency of electron mobility. The electrochemical properties of materials were evaluated, and CM-S showed a mass-specific capacitance of 201 F g−1 at 0.2 A g−1 current density, along with an impressive capacitance retention rate of 54.7 % at 10 A g−1 current density, which is more potential than CM-A and CM-K (specific capacitances: 100 F g−1 and 75 F g−1 respectively). Additionally, maximum energy and power density of CM-S were measured to be 6.98 W h kg−1 and 2306 W kg−1 with excellent retention rate of 95.5 % after 10,000 charge–discharge cycles at a current density of 5 A g−1. Comparatively, sodium lignosulfonate, compared with alkali lignin and kraft lignin, emerges as a more ideal precursor material for porous carbon electrode.
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Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Conducting polymers and applications · Electrochemical sensors and biosensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou 510640 , P.R. China
School of Food Science and Engineering , South China University of Technology , Guangzhou 510640 , P.R. China
Funding
Key Project of Research and Development Plan of Guangdong Province · Science and Technology Planning Project of Guangdong Province · National Key Research and Development Program of China
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