NOVELTY - Lithium ion battery comprises a negative electrode comprising a lithium intercalation composition, a positive electrode comprising a metal compound (Li1+xM1-yO2-zFz), and a separator between the negative electrode and the positive electrode, where after 600 cycles between 2-4.5 V, the negative electrode comprises no more than 1 wt.% of transition metals from the positive electrode.    USE - The lithium ion batteries are useful in consumer electronics, mobile communication devices, such as phones, mobile entertainment devices, such as media players and televisions, portable computers, and transportation devices, such as automobiles and fork lifts, and for medium current applications, such as hybrid vehicles, plug-in hybrid vehicles and electric vehicles.    ADVANTAGE - The lithium ion batteries have improved performance characteristic such as energy density, capacity and tap density, and improved lifetime.    DETAILED DESCRIPTION - Lithium ion battery comprises a negative electrode comprising a lithium intercalation composition, a positive electrode comprising a metal compound of formula (Li1+xM1-yO2-zFz), and a separator between the negative electrode and the positive electrode, where after 600 cycles between 2-4.5 V, the negative electrode comprises no more than 1 wt.% of transition metals from the positive electrode.    M = metal elements;    x = 0.01-0.33; and    y = x-0.2-x+0.2.    Provided that y is greater than or equal to 0, and z is 0-0.2. An INDEPENDENT CLAIM is included for a lithium ion battery comprising an electrolyte comprising lithium ions and the negative electrode comprising a lithium intercalation/alloying composition, where after cycling the battery for 20 cycles from 2-4.5 V and after discharging the battery to 98% of the discharge capacity, the negative electrode can be removed and electrochemically de-intercalated/de-alloyed with a capacity of at least 0.5% of the negative electrode capacity with the corresponding removal of lithium from the negative electrode.