Provided is a positive electrode material for a lithium battery with an atomic ratio expressed by the formula (I) Li a (M x Mn 2-x )(O 4-y Z y ) for 0.8‰¤a‰¤1.2, 0‰¤x‰¤1 and 0‰¤y‰¤1 in which M is one or more of Li, Na, K, Ca, Mg, Al, Ti, ...

The invention provides a solid oxide fuel cell stack, which comprises an upper current collector plate (1), a lower current collector plate (2) and a stack structure (3) accommodated between the upper current collector plate (1) and the lower current colle...

The invention relates to a graphene-modified lithium iron phosphate positive electrode active material and a method for preparing the same, as well as a lithium-ion secondary cell based on this positive electrode active material. The positive electrode act...