Parts of this thesis have been published in the following journal articles:; Supervisors' Foreword; Acknowledgments; Contents; 1 Literature Review and Research Background; 1.1 Introduction to Graphene; 1.2 Summary of Graphene Preparation Methods; 1.3 The Synthesis and Structure of Graphite Oxide; 1.4 The Formation of Reduced Graphene Oxide; 1.4.1 Thermal Annealing; 1.4.2 Chemical Reduction; 1.5 Application Prospect of Reduced Graphene; 1.5.1 Paper/Membrane-Like Materials; 1.5.1.1 Graphite Oxide Paper; 1.5.1.2 Electric-Conductive Reduced Graphene Paper; 1.5.1.3 Transparent Conducting Film

1.5.2 Energy Storage Materials1.5.2.1 Supercapacitor; 1.5.2.2 Li-Ion Cell; 1.5.3 Other Applications; 1.6 The Proposal of the Topic and the Main Research Contents; References; 2 Structural Evolution of the Thermally Reduced Graphene NanosheetsDuring Annealing; 2.1 Introduction; 2.2 Experimental; 2.2.1 Preparation of TRG; 2.2.2 Sample Characterization; 2.2.3 Electrochemical Measurements; 2.3 Results and Discussion; 2.3.1 Structural Evolution; 2.3.2 Electrochemical Performance; 2.4 Conclusions; References; 3 Hierarchical Amination of Graphene for Electrochemical Energy Storage; 3.1 Introduction

3.2 Experimental3.2.1 Preparation of Hierarchically Aminated Graphene; 3.2.2 Sample Characterization; 3.2.3 Electrochemical Measurements; 3.3 Results and Discussion; 3.3.1 The Microstructure of AGHs; 3.3.2 The Surface Chemistry of AGHs; 3.3.3 The Electrochemical Capacitance of AGH; 3.4 Conclusions; References; 4 Free-Standing Graphene Film with High Conductivity by Thermal Reduction of Self-assembled Graphene Oxide Film ; 4.1 Introduction; 4.2 Experimental; 4.3 Results and Discussion; 4.4 Conclusions; References

5 Template-Directed Macroporous 'Bubble' Graphene Film for the Application in Supercapacitors5.1 Introduction; 5.2 Experimental; 5.2.1 Synthesis of PMMA Latex Spheres; 5.2.2 Hard Template Route for Macroporous Graphene Film; 5.2.3 Structural Characterization; 5.2.4 Electrochemical Measurements; 5.3 Results and Discussion; 5.4 Conclusions; References; 6 SnO2@Graphene Composite Electrodes for the Application in Electrochemical Energy Storage; 6.1 Introduction; 6.2 Experimental; 6.2.1 Pre-graphenization: SnO2@TRG Hybirds; 6.2.2 Post-graphenization: SnO2@CRG Hybrids; 6.2.3 Sample Characterization

6.2.4 Li-Ion Battery Performance Measurements6.2.5 Supercapacitor Performance Measurements; 6.3 Results and Discussion; 6.3.1 Pre-graphenization: Structure of TRG and SnO2@TRG Hybrids; 6.3.2 Post-graphenization: Structure of SnO2@CRG Hybrids; 6.3.3 Electrochemcial Performance; 6.3.3.1 Li-Ion Battery; 6.3.3.2 Supercapacitor; 6.4 Conclusions; References; 7 Main Conclusions and Plan of Further Work; 7.1 Conclusions; 7.2 Primary Innovation Points; 7.3 Planning of Future Work