▎ 摘　　要

Rechargeable aluminum batteries (RABs) attract plenty of researchers due to their high theoretical energy density, first-rate safety performance, cheap and abundant mineral reserves. Nevertheless, how to solve the problems such as poor long-term cycle performance, low high-rate capacity, and low reversible capacity has become the key to realizing industrial production. Here we successfully prepare the selenium nanosphere@Ti3C2@graphene oxide (SSM@GO) with an initial discharge capacity of 570.34 mAh g-1 at 1 A g-1, and the discharge capacity remains 253 mAh g-1 even after about 4000 cycles. The Ti3C2 and GO layers are coated on the surface of the selenium nanosphere (SS) successfully, which have a lot of benefits to achieve higher performance. It is worth noting that the dual-channel selenium nanosphere@Ti3C2 (SSM) structure can provide the redox reaction of selenium inside the sphere and the reversible intercalation of [AlCl4]- on the sphere's outsurface at the same time, which is the key of the dual-channel strategy. This new engineering strategy has made a great breakthrough in long-term RABs. It also expands the idea for further preparing long-term stable RABs and encourages researchers to explore more excellent cathode materials of RABs.