Lithium manganese aluminum oxide-based full Li-ion battery using carbon fibers as current collectors

Herein, Li-ion battery using carbon fibers instead of conventional aluminum/copper foils as the current collectors is assembled. To achieve the binder-free environment, LiMn_0.97Al_0.03O₂-based fiber type cathode is prepared directly via a two-step strategy involving electroplating and hydrothermal method by forming active materials on the individual carbon fiber. Cu₆Sn₅-based fiber type anode is prepared directly via electroplating and subsequent heat treatment. The resulting LiMn_0.97Al_0.03O₂|Cu₆Sn₅ Li-ion battery using carbon fiber as the current collector functions at about 3 V, with an initial capacity of 180 mAh g^?1 (based on the cathode). The capacity retention is 90 % after 150 cycles. In particular, the battery using phosphate-modified LiMn_0.97Al_0.03O₂-based fiber type electrode demonstrates a better cycling and high rate performance compared to the unmodified counterpart.