Intro -- ABSTRACT -- POPULÄRVETENSKAPLIG SAMMANFATTNING -- ACKNOWLEDGMENT -- LIST OF PUBLICATIONS INCLUDED IN THIS THESIS -- LIST OF PUBLICATIONS NOT INCLUDED IN THIS THESIS -- ABBREVIATION -- TABLE OF CONTENTS -- 1 INTRODUCTION -- 2 ELECTRICITY ENERGY STORAGE -- 3 MATERIALS APPLIED IN ELECTRICITY ENERGY STORAGE -- 4 MECHANOCHEMISTRY APPLIED IN THE FABRICATION OF ELECTRODES -- 5 SELF-DISCHARGE STUDY OF LS/GRAPHITE HYBRID MATERIAL ELECTRODES -- 6 ELECTRODE MATERIAL CHARACTERIZATION -- 7 CONCLUSION AND FUTURE OUTLOOK -- 8 SUMMARY OF PAPERS -- REFERENCE.