High-rate aluminium yolk-shell nanoparticle anode for Li-ion battery with long cycle life and ultrahigh capacity.

ABSTRACT: Alloy-type anodes such as silicon and tin are gaining popularity in rechargeable Li-ion batteries, but their rate/cycling capabilities should be improved. Here by making yolk-shell nanocomposite of aluminium core (30?nm in diameter) and TiO2 shell (?3?nm in thickness), with a tunable interspace, we achieve 10?C charge/discharge rate with reversible capacity exceeding 650?mAh?g(-1) after 500 cycles, with a 3?mg?cm(-2) loading. At 1 C, the capacity is approximately 1,200?mAh?g(-1) after 500 cycles. Our one-pot synthesis route is simple and industrially scalable. This result may reverse the lagging status of aluminium among high-theoretical-capacity anodes.

SUBMITTER: Li S 

PROVIDER: S-EPMC4918313 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature