Accelerating ion/electron transport by engineering an indium-based heterostructure toward large and reversible lithium storage.

The high activity of the In 2 O 3 /In 2 S 3 heterostructure can be activated into homogeneous In 2 O x S 3- x nanodots, thereupon stabilizing the subsequent cycles. The In 2 O 3 /In 2 S 3 can offer a high capacity of 1140 mA h g -1 at 0.1 A g -1 after 290 cycles, and even at 1 A g -1 , it harvests a reversible capacity of 900 mA h g -1 after 600 cycles.