声明
Abstract
摘要
Contents
Chapter 1 Introduction
1．1 Introduction
1．2 Biomass-based carbon materials
1．2．1 Preparation methods of biomass-based porous carbon materials
1．2．2 Amorphous carbon materials
1．2．3 Pseudo-graphitic carbon materials
1．3 Seaweed-based carbon materials
1．3．1 Introduction to seaweed
1．3．2 Seaweed derived carbon materials
1．3．3 Seaweed-based carbonaceous materials as electrochemical energy storage devices' electrodes
1．4 Supercapacitors
1．4．1 Electric double layer capacitors
1．4．2 Pseudocapacitors
1．4．3 Asymmetric SCs
1．4．4 Hybrid SCs
1．4．5 Distinguishing between pseudocapacitors， asymmetric supercapacitors and hybrid supercapacitors terminologies
1．5 Lithium ion hybrid capacitors
1．5．1 Principles of lithium ion hybrid capacitors
1．5．2 Carbon electrodes for LIHCs
1．5．3 All-Carbon Architectures
1．6 Research significance and research content of the current project
1．7 Main research contents of this project
Chapter 2 Experimental
2．1 Reagents and raw materials
2．2 Experimental instruments and equipment
2．3 Experimental methods
2．3．1 Pyrolysis of dried seaweed
2．3．2 Seaweed alkali treatment
2．3．3 Preparation of seaweed-based porous carbon (two-steps method)
2．3．4 Preparation of porous carbon from alkali treated seaweed (one-step method)
2．4．Experimental flow chart
2．5 Sample characterization equipment and test methods
2．5．1 X-ray diffraction
2．5．2 Phase distribution calculation
2．5．2 Raman spectroscopy
2．5．3 Scanning electron microscopy (SEM)
2．5．5 Specific surface area and pore size distribution test
2．5．8 Electrical conductivity
2．6 Electrochemical measurements
2．6．1 Supercapacitors
2．6．2 Lithium ion battery and lithium ion hybrid capacitor
Chapter 3 Preparation of two-steps synthesized seaweed-based porous carbons and study their performance in supercapacitors
3．1 Introduction
3．2 Results and discussion
3．2．1 Surface morphology
3．2．2 Study of surface crystallinity
3．2．3 Analysis of the pore structure
3．2．4 XRD and Raman analysis
3．2．5 Electrical conductivity
3．2．6 XPS analysis
3．2．7 Analysis of the electrochemieal performance of the samples in the aqueous media
3．2．8 Analysis of the electrochemical performance of the samples in the ionic liquid
3．3 Summary of this chapter
Chapter 4 Preparation of one-step synthesized seaweed-based porous carbons and study their performance in supercapacitors
4．1 Introduction
4．2 Results and discussion
4．2．1 Surface morphology
4．2．2 Study of surface crystallinity
4．2．3 Analysis of the pore structure
4．2．4 XRD and Raman analysis
4．2．5 XPS analysis
4．2．6 Analysis of the electrochemical performance of the samples in the aqueous media
4．2．7 Analysis of the electrochemical performance of the samples in the ionic liquid
4．3 Summary of this chapter
Chapter 5 Seaweed·derived porous carbons as lithium ion battery anode and cathode，and lithium-ion hybrid capacitor electrodes
5．1 Introduction
5．2 Results and discussion
5．2．1 Electrochemical evaluation of lithium-ion battery cathode half-cells
5．2．2 Electrochemical evaluation of Iithium-ion battery anode half-cells
5．2．3 Hybrid asymmetric lithium ion capacitors based on ASW electrodes
5．3 Summary of this chapter
Chapter 6 Conclusion
参考文献
Acknowledgments
Research results and published academic papers
Brief introduction of the author and mentor
北京化工大学;
