Abstract: The present invention discloses a method of preparing an electrode material for lithium-ion batteries comprising the steps of preparing a mixture of precursors taken in predefined stoichiometric ratios for synthesis of lithium iron phosphate (LiFePO4), adding niobium pentoxide as a precursor for doping of niobium at Li+ site of LiFePO4 for synthesis of niobium doped LiFePO4 and ball milling operation provides nano sized powder particles. Now, a precursor of carbon is added to said mixture of precursors for synthesizing and obtaining carbon coated niobium doped LiFePO4 nano sized powder particles. Pellets of required size are prepared and sintered. The obtained pellets are structurally characterized.

Abstract: The present invention discloses a method of preparing an electrode material for lithium-ion batteries comprising the steps of preparing a mixture of precursors taken in predefined stoichiometric ratios for synthesis of lithium iron phosphate (LiFePO4), adding niobium pentoxide as a precursor for doping of niobium at Li+ site of LiFePO4 for synthesis of niobium doped LiFePO4 and ball milling operation provides nano sized powder particles. Now, a precursor of carbon is added to said mixture of precursors for synthesizing and obtaining carbon coated niobium doped LiFePO4 nano sized powder particles. Pellets of required size are prepared and sintered. The obtained pellets are structurally characterized.

Abstract: A prismatic Zn—AgO secondary twin cell battery includes: an outer cell case of prismatic shape, wherein the outer cell case has bottom surface and a top surface with a cell case cover, an electrode assembly housed inside the outer cell case. The electrode assembly is formed by stacking a positive electrode plate and a negative electrode plate covered with a separator. The cell case cover is provided on the top/upper surface with a positive electrode terminal and a negative electrode terminal which seals the battery twin cell and an internal cell wall interposed in between the positive electrode plate and the negative electrode plate. The positive electrode plate and the negative electrode plate are coupled internally by crimping and potted to avoid inter cell leakage.