Characteristics of Lithium-Gel Battery Based on a Li-Al Alloy Anode

Abstract
LiAl alloy with trace Al doping was originally introduced as the anode of a lithium-gel battery. The characteristics of the lithium-gel polymer battery which comprised such a LiAl alloy anode, cathode, and poly(vinylidene fluoride)-based gel-type polymer electrolyte were investigated. It was indicated that such a LiAl alloy anode had similar charge/discharge behavior to a pure lithium anode. Although only Al was doped, the LiAl alloy showed obvious better surface stability than pure lithium in a gel battery, which resulted in lower interfacial resistance and interior impedance of cell. Consequently, the cycling efficiency and cycleability of the LiAl alloy cell was effectively improved in comparison with the cell using pure lithium anode.