ABSTRACT
Developing light-weight and convenient lithium-ion batteries is in line with the rapid development of the modern society. We have studied the feasibility of using LiFePO4 button cells without aluminum foil, particularly with regard to the electrochemical properties. The charge/discharge capacity and cycle stability of LiFePO4 electrodes were studied by using two methods, including Al foil and the LiFePO4 cathode-active materials without Al foil. The specific capacity as a measured criterion to investigate the influence of the current collector on the electrochemical properties of LiFePO4 was studied. It can be concluded from this paper that the LiFePO4 Li-ion batteries without current collectors can be used in the future, at least in the laboratory. This simple and potentially universal design strategy will be probably pursued in the future in the assembling of lithium batteries for portable power applications.
