Lithium Cycling in a Self-Assembled Copper Chloride–Polyether Hybrid Electrode

Atomic-scale integration
of polyether molecules and copper­(II) chloride layers in a two-dimensional
perovskite affords, to the best of our knowledge, the first example
of extended Li+ cycling in a metal chloride electrode.
The hybrid can cycle over 200 times as a cathode in a lithium battery
with an open-circuit voltage of 3.2 V. In contrast, CuCl2 alone or the precursors to the hybrid cannot be cycled in a lithium
battery, demonstrating the importance of the layered, organic–inorganic
architecture. This work shows that appropriate organic groups can
enable Li+ cycling in inexpensive, nontoxic, metal halide
electrodes, which is promising for large-scale applications.