Electrochemical electrodes 2 Flexible electrodes 2D material 1 2d material 1 Biocompatibility 1 Biopolymer, flexible electrode 1 Biopolymers 1 Capacity performance 1 Cathode electrodes 1 Cost effectiveness 1 Current-collector 1 Disposable electrodes 1 Electric current collectors 1 Electrochemical characteristics 1 Environmental pollutions 1 Etching 1 Etching process 1 Free standings 1 Free-standing electrode 1 Functionalized 1 Ions 1 Iron compounds 1 Kappa carrageenan 1 Lithium compounds 1 Lithium-ion batteries 1 Mechanical 1 Mercury (metal) 1 Mercury detection 1 Metal ions 1 Nanocomposites 1