NOVELTY - An electrode comprises electronically active material (EAM) in nanoparticulate form and a matrix.    USE - As an electrode such as cathode and anode for rechargeable lithium battery (claimed) which is used in computer, cars and electro bicycles.    ADVANTAGE - The electrode has enhanced cycle stability; has increased shelf-life; provides low or reduced matrix content and high matrix conductivity at large mechanical stability; and provides battery which can be stored under conditions corresponding to 3-4 days at 30 degrees C.    DETAILED DESCRIPTION - An electrode comprises electronically active material (EAM) in nanoparticulate form and a matrix, where prior to the first charging or discharging, the EAM is LixH2-xV3O8 (where x is 0.1-1.5 (preferably 0.5-1.5, especially close to 1), where at least 1 of the 3 V-atoms in the formula unit has the oxidation state 4+. INDEPENDENT CLAIMS are included for the following:    (1) producing a particle based, especially a fiber based electrode material involving preparing an electronically active precursor material comprising dispersion, where the dispersion comprises a soluble lithium source and a hydroxide source, especially lithium hydroxide, an at least partially organic substance that is water soluble and that mixed with electronically active material can be pyrolized, an electronically active material (EAM), and graphene oxide, separating the solid electronically active precursor material from the liquid phase, drying the electronically active precursor material, and pyrolizing the electronically active precursor material to yield an active electrode material;    (2) producing battery involving placing electrode in a cell and covering with at least one separator, and filling the cell with electrolyte, where the cell is completed with a lithium anode and tightly closed;    (3) improving the battery involving storing the battery under conditions corresponding to 3-4 days at 30 degrees C; and    (4) charging battery involving performing a fast cyclovoltammetric step at 1.6-2.8 V and a galvanostatic step at 2.8-4.1 V.