NOVELTY - A lithium battery (100), comprises: an anode (102); a cathode (104) located opposite to the anode; a separator (106) located between the anode and cathode, where the anode, cathode and the separator commonly define a containing region (110); and an electrolyte solution (108) located in the containing region, and comprising an organic solvent, a lithium salt and an additive, where the additive comprises a maleimide-based compound; and a hydroxyl-containing species (I) (0.05-5 wt.%), having a molecular weight of less than 1000.    USE - As lithium battery (claimed) useful in portable electronic products such as digital cameras, mobile phones, and notebook computers.    ADVANTAGE - In the present lithium battery, since the maleimide-based compound and the hydroxyl-containing species are contained in the mixing additive of the electrolyte solution, the mixing additive has an electrochemical reaction to form a special substance on an electrode surface to mitigate decomposition of the electrolyte solution on the electrode surface. Thus, loss of capacity during charge-discharge cycles of the lithium battery can be reduced and this effectively increases the battery capacity, and the battery characteristics can thus be improved. Moreover, the method for fabricating the lithium battery solves conventional problems of high water content in the battery, and an environment with high dryness and low moisture content is not necessary for fabrication. The lithium battery can be fabricated under a specific humidity condition which improves the capacity of the lithium battery. The method can be integrated with the existing fabrication process, and has a simple fabrication process and formulation. In addition, the battery performance can be effectively improved even without applying a high-precision drying plant, so that the fabrication cost of the battery is effectively reduced, and competitiveness is improved.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for fabricating the lithium battery, involving: separating an anode and a cathode by a separator to fabricate a battery jelly-roll under a dew point of -5 to 15 degrees C, where the anode, cathode and the separator commonly define a containing region; and filling an electrolyte solution in the containing region, where the electrolyte solution comprises an organic solvent, a lithium salt, and an additive comprising a maleimide-based compound.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of a lithium battery.    Lithium battery (100)    Anode (102)    Cathode (104)    Separator (106)    Electrolyte solution (108)    Containing region (110)    Package structure (112)