Nickel-promoted Electrocatalytic Graphitization of Biochars for Energy Storage: Mechanistic Understanding using Multi-scale Approaches |
| |
| Authors: | Dr Shijie Li Dr Xue Han Prof Dr Wei-Li Song Prof Dr Zhe Wang Prof Dr Yan-li Zhu Prof Dr Shuqiang Jiao |
| |
| Institution: | 1. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081 P. R. China;2. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 P. R. China;3. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081 P. R. China |
| |
| Abstract: | Owing to high-efficiency and scalable advantages of electrolysis in molten salts, electrochemical conversion of carbonaceous resources into graphitic products is a sustainable route for achieving high value-added carbon. To understand the complicated kinetics of converting amorphous carbon (e.g. carbonized lignin-biochar) into highly graphitic carbon, herein this study reports the key processing parameters (addition of Ni, temperature and time) and multi-scale approach of nickel-boosted electrochemical graphitization-catalysis processes in molten calcium chloride. Upon both experiments and modellings, multi-scale analysis that ranges from nanoscale atomic reaction to macroscale cell reveal the multi-field evolution in the electrolysis cell, mechanism of electrochemical reaction kinetics as well as pathway of nickel-boosted graphitization and tubulization. The results of as-achieved controllable processing regions and multi-scale approaches provide a rational strategy of manipulating electrochemical graphitization processes and utilizing the converted biomass resources for high value-added use. |
| |
| Keywords: | Electrochemical Conversion Electrolysis Molten Salt Multi-Scale Approach Potassium-Ion Batteries |
|
|
