A STRUCTURAL BATTERY HALF CELL, A STRUCTURAL BATTERY AND THEIR MANUFACTURE

摘要

There is provided a battery and a battery half cell comprising at least one carbon fiber as negative electrode, said carbon fiber comprising a plurality of layers with carbon atoms having graphite structure, said plurality of layers having an ability of intercalating metal ions, said carbon fiber having a strength of at least 1 GPa and a stiffness of at least 100 GPa in the longitudinal direction of said carbon fiber, said carbon fiber is at least partially coated with at least one electrically insulating polymer layer acting as an electrolyte, wherein said insulating polymer layer is permeable for metal ions, said insulating polymer layer having a stiffness of at least 0.5 MPa, said insulating polymer layer having an ionic conductivity of at least 10-10 S/m and an electrical resistivity of at least 1010 Omegam, said insulating layer has a thickness in the interval 10-200 nm. Advantages include that it is possible to utilize thin layers of electrolytes without creating large ohmic losses, structural batteries can be made of carbon fibers.