Ultrafast all-climate aluminum-graphene battery with quarter-million cycle life.

ABSTRACT: Rechargeable aluminum-ion batteries are promising in high-power density but still face critical challenges of limited lifetime, rate capability, and cathodic capacity. We design a "trihigh tricontinuous" (3H3C) graphene film cathode with features of high quality, orientation, and channeling for local structures (3H) and continuous electron-conducting matrix, ion-diffusion highway, and electroactive mass for the whole electrode (3C). Such a cathode retains high specific capacity of around 120 mAh g^-1 at ultrahigh current density of 400 A g^-1 (charged in 1.1 s) with 91.7% retention after 250,000 cycles, surpassing all the previous batteries in terms of rate capability and cycle life. The assembled aluminum-graphene battery works well within a wide temperature range of -

SUBMITTER: Chen H 

PROVIDER: S-EPMC5733111 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature